Building an eBay power filter kit (with schematic).

Рет қаралды 190,711

Күн бұрын

This is a very common kit on eBay intended for use with audio amplifiers to filter out mains borne noise. It looks as though it's been copied from another design, but with the usual flaws introduced during the interpretation. Particularly with regard to separation, current carrying path, pad sizing for mechanical strength and a possible swap of MOVs for class Y filter caps.
It's quite easy to build with basic tools but will need mounted in a suitable enclosure (often the amplifier itself) with insulated pillars due to a slight design issue with live to ground clearance.
This module might find applications inside other equipment sensitive to mains borne transients and noise. Keep in mind you can buy fully compliant inline filter modules for equipment from local electronic suppliers for professional applications.
I may have described the common mode choke completely back to front. Let me know your thoughts on that.
Here's a search link for the kits:-
www.ebay.com/sch/i.html?_from...
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.com/coffee.htm
This also keeps the channel independent of KZfaq's advertising algorithms allowing it to be a bit more dangerous and naughty.

Пікірлер: 637

@ElmerFuddGun 4 жыл бұрын

Getting the parts orientated in the same direction *isn't just about aesthetics* but actually makes circuit checking and diagnoses so much easier when you don't need to turn the board around, etc. It is a good habit to learn.

@shanejohns7901 Жыл бұрын

It also helps when it comes to odd noises and interferences generated due to imbalances in the circuit. It becomes an even greater concern at the microchip level, where the distances are much smaller.

@Rileypotts107 4 жыл бұрын

I'm autistic too! Thank you for providing me mental comfort with your videos. Videos like yours really help to calm me down.

@Quick_Fix 4 жыл бұрын

Don't worry, there aren't many non-autistic-y engineers (and IT guys) around; it's almost mandatory. 😋

@barthonhoff5547 4 жыл бұрын

Now it is confirmed by the expert Big Clive, I am autistic as well! Why need other experts?

@BlackEpyon 4 жыл бұрын

Technical fields like this tend to draw in those in the autistic spectrum. We just think differently.

@railgap 3 жыл бұрын

**raises hand** - but understand; most smart people are on the spectrum to some degree. Part of autism is - generally speaking - I/O processing abilities that neurotypicals cannot even comprehend, let alone actually accomplish. ;)

@Sharklops 4 жыл бұрын

"Fit it in whichever holes come closest" That's just a good life lesson right there.

@MrV1NC3N7V3G4 4 жыл бұрын

About cutting the lead too short: 12:36 "Not to worry" 13:07 "Not to worry. I'm not bothered." 15:57 "I'm not too bothered by that." (It's really bothering him lol!)

@mumbaiverve2307 2 жыл бұрын

It bothers me too when it happens to me :D

@wojomojo 4 жыл бұрын

I love how you create monetizable videos using the cheapest items imaginable and a healthy dose of knowledge and care.

@railgap 3 жыл бұрын

except they aren't monetized! send him $ via Patreon or whatever!

@paulcabrelli1863 4 жыл бұрын

For me as a newbie to electronics this was absolutely fascinating. I just loved the explanation as to how the circuit worked with the components and also your analysis of the components used. Love your channel. :)

@deadbeef16 4 жыл бұрын

I love your soldering style. If one has mastered the art of steady hands, it is so much easier and efficient.

@stevenbirch 4 жыл бұрын

I enjoyed the water-tank analogy for the filter cap - I shall definitely use that when explaining EMC filters to the hydraulics engineers at work!

@rambo1152 4 жыл бұрын

Do plumbers use electrical analogies? Seems only fair really.

@COBARHORSE1 4 жыл бұрын

Your hydraulics engineers will understand capacitors as accumulators.

@juststeve5542 4 жыл бұрын

I want a live demonstration of its operation... In AC of course. (I don't think this should be done inside!).

@geoffreykeane4072 4 жыл бұрын

I once got shown a “circuit board” as used on an oil refinery control system. They didn’t use electricity they used air. The board was two plates bonded together. The “traces” were tubes embossed between the plates. Capacitors were implemented using tiny bellows. Resistors were little Venturi. I can’t remember all the details (this was early eighties) but it still amazes me.

@Anvilshock 4 жыл бұрын

@@geoffreykeane4072 Many appliances in EX (explosive hazard) atmospheres run on compressed air indeed. There's a whole range of sensors, regulators, and actuators run entirely on the flow and pressure of not electrons but good old bellows stuffing. I worked with them in chemical industry myself. Fun stuff.

@ColinTimmins 4 жыл бұрын

I miss the old printer paper, folding it over and tearing the sides off with the holes. Simple satisfaction...

@Kineth1 4 жыл бұрын

Not to mention: The ability to print right past the bottom of the page with no margin. Remember when you could print a banner on any old printer and not have to tape together 17 sheets?

@tncorgi92 4 жыл бұрын

The computer facility I worked at ran through so much fanfold paper that we saved the torn off edges in a big box to use as packing material.

@daicekube 4 жыл бұрын

Mmmm... Memories of elder times... Formaline we used to call those tear-off strips with holes that fed into the tractors. And the striped paper 132 or 148 character wide I think, 48 lines long unless it was the "Yankee-format". That paper had pink stripes, not blue, and 72 lines if I remember correctly. At least ours did. Did a lot of off-line printing when I was young. Running six big bulky Sperry Univac line printers fed by, would you believe, Datapoint 2200-series computers and stand alone tape stations. Then came the lasers and the fun went out of it.

@NOOTSMAZDAS 3 жыл бұрын

My grandpa still has some 😂

@ravencrovax 2 жыл бұрын

I remember fan-fold printer paper and I am only 38... Wait. That is actually pretty ancient these days, isn't it?

@ThereIsOnly1ArcNinja 4 жыл бұрын

"You won't know this - unless you're very old." - I feel a sudden ache to my back... ;-)

@DanafoxyVixen 4 жыл бұрын

The day power company's switch to charging households for Apparent Power and crappy power factor will be an interesting day indeed

@james10739 4 жыл бұрын

Ya I have checked a lot of things and on several things with compressors i have improved the power factor with a capacitor across the compressor just because and because i am working on doing some off grid stuff but like my xbox and Samsung tv are around a .6 power factor which is bot great but i have a cheap 65 inch tv in the living room and it is like .98 or something real high which is surprising because its cheap

@fulkthered 4 жыл бұрын

There's going to have to be a radical redesign of electrical devices.Right now too many electronics are drawing microamps on standby mode.Dave Jones at eevblog just did a video about how much power something as simple as smoke detectors are eating up.

@uK8cvPAq 4 жыл бұрын

@@james10739 A lot of the big TV's are coming with built in power factor correction these days even the cheaper ones, the PFC designs are becoming more standardized and use an IC, MOSFET and inductor (basically a boost stage timed with the mains waveform before the big DC filter capacitor).

@mrb692 4 жыл бұрын

Okurka With an atrocious power factor, even microamps would add up if charged by apparent power

@databanks 4 жыл бұрын

@@chaosflower4892 Depends what the price of power is in your local area, what provider you're with, what particular price plan you're on, even what time of the day.

@vezzosetto 4 жыл бұрын

I love how you explain everything in great detail!

@CTCTraining1 4 жыл бұрын

Hmm, fan-fold printer paper, yes .... also like punched paper tape sprocket holes! From the days when bugs were wildlife which may cause your software to fail. :-)

@richardbrobeck2384 4 жыл бұрын

yes indeed

@mikeweller9933 4 жыл бұрын

Fan fold, still made still used in many different sizes.

@tinplategeek1058 4 жыл бұрын

I worked with fan-fold paper in the 80's. Use to print bank statements on high speed metal belt printers which meant a full box of paper didn't last too long. Always great fun when the paper wouldn't stack again on exit from the print mechanism and you had to hand fold the paper without tearing or getting dirt on it. And we also used punch cards for program initiation and daily parameter changes. Oh the good old days.

@edgeeffect 4 жыл бұрын

Still got a big box of it in my office today to go with my Epson FX-100

@Mark1024MAK 4 жыл бұрын

Hours of “fun” when a fan fold dot matrix line printer ends up with misaligned paper and the toothed drive wheels shred the edges of the paper... Or when something disturbs the output pile and it then settles down folding the paper the wrong way round... but you have to sort out the resulting mess!

@Tyler_0_ 4 жыл бұрын

A common mode choke works in the opposite manner that you showed; the fields cancel with normal differential AC current flow, and the fields add in the case of common mode current.

@westinthewest 4 жыл бұрын

@@stargazer7644 I'm with Tyler on this. The fields add in the case of common mode current. This creates a magnetic field, and that very field opposes the flow of the current which created it. That's how I understand inductance to work. I think it's Lenz's law.

@Tyler_0_ 4 жыл бұрын

@@stargazer7644 Yes, that is what it does, what I explained was the magnetic fields created in the choke core.

@justpaulo 4 жыл бұрын

Agree. www.researchgate.net/figure/Inductive-choke-a-Differential-mode-b-Common-mode_fig2_251990299

@Mark1024MAK 4 жыл бұрын

Or to put it more simply, any induced magnetic field causes a corresponding EMF (voltage) which opposes the current flow. With this application, the mains current produces two different magnetic fields each of which has the same strength, hence they cancel one another out, so no resulting EMF.

@railgap 3 жыл бұрын

I was going to comment on this. He had the concept right, but was wrong about when the inductance "activates" as it were. And of course, those chokes can be wired as differential or common mode, and in a few COTS EMI filters (Corcom etc) there is one of each, although differential mode is usually accomplished with two inductors not coupled for some reason I have had too little coffee this AM to recollect... also, printer paper: I got to use actual teletypes in the USAF. I'm not that old, our site was slow to get updated hardware. I was shocked when I got there in 1981 to see 1950s comms, 1960s compute and 1970s crypto. O_O

@romanbriggs2457 4 жыл бұрын

I like the way you solder! I've watched your channel for years, and I picked up your technique. It's not often that I need to solder at work, but I always get strange looks when I do it your way

@davidv1289 4 жыл бұрын

OH NOOOO! Genuine Rifa capacitors - the scourge of old test equipment. Hope they have changed the type of plastic used for the outer shell. Great explanations of common mode choke and X cap function. Thank you Clive.

@Anvilshock 4 жыл бұрын

The choke explanation is the wrong way round, though. It's the induction from common mode noise that is _in_ phase; the induction from regular LN AC is out of phase.

@Mark1024MAK 4 жыл бұрын

David V - Did you “enjoy” the smelly smoke from some failed Rifa paper insulated capacitors then 🤣

@tcmtech7515 4 жыл бұрын

@@Anvilshock Yep, he did it backwards.

@davidv1289 4 жыл бұрын

@@Mark1024MAK Nooooo! I just had one fail (missed it during inspection after purchase) in an HP 4262A LCR meter. I had to remove all cards and clean them and the chassis to get rid of the stink. There was this yellow film.................

@Mark1024MAK 4 жыл бұрын

David V - some 1980s computers are renowned for their old Rifa X2 capacitors going pop and filling rooms with their distinctive horrible smell. If you don’t clean up any of the gunk that gets on a nearby heatsink, it will continue to stink every time it is on long enough for the heatsink to heat up....

@mohsins.3851 4 жыл бұрын

Big fan of your disassembles (and your videos in general), please do more of them :)

@TheBaldr 4 жыл бұрын

Nothing like tearing the edges off the printer paper...only to tear the document itself and having to reprint it.

@AnnaVannieuwenhuyse 4 жыл бұрын

this is a mood

@TheMixedupstuff 4 жыл бұрын

The unique noise in unforgettable.

@TheEPROM9 4 жыл бұрын

I use to do that all the time

@TechGorilla1987 4 жыл бұрын

Or as in my case - not being able to turn in an assignment because of the nobbly bits on the edges.

@Mark1024MAK 4 жыл бұрын

@dantuck5242 4 жыл бұрын

Terrible filter. Hooked to my tap and now my water just tastes like sine waves

@yeet1337 4 жыл бұрын

But you do feel all the new and refreshing energy, right?

@Thirdbase9 4 жыл бұрын

Funny mine taste like cosine waves.

@BenCos2018 4 жыл бұрын

lol

@bluerizlagirl 4 жыл бұрын

@@Thirdbase9 Don't worry, it's just a phase.....

@eugenepolan1750 4 жыл бұрын

I agree! I built one up and used it to replace the filter in my Hoover, but now dust and dirt blow out as fast as they get sucked in.

@FCWW87 Жыл бұрын

“I shall connect it to the mains, and see if it goes bang!” I know that because the video is posted, it didn’t go bang in too bad of a way. I still love that he has a sense of humor around electricity, all while giving her great respect as well.

@tin2001 4 жыл бұрын

When my brother did his high school work experience at the computer shop I was working for..... First job we had him do was hook up an old dot matrix printer, load some tractor feed paper, and run a DOS program I'd written that printed out his list of tasks for the week... I had intentionally introduced a short pause between every character to make it print slow, so it took about 10 minutes to print... Which is roughly how long it took him to figure out how to feed the paper in.

@jbigroup5070 4 жыл бұрын

The good branded MCBs have the skirt to prevent the busbar from being inserted behind the clamp, saw this well over a year ago when replacing consumer units. Good vid Clive. 👍

@sincerelyyours7538 4 жыл бұрын

I do envy your finger dexterity - something I once had as a young technician. Age and chemo have a way of damaging the nerves in one's fingers. I use various clamping devices now to prevent finger cramps more than to hold things for soldering, but after a 40 year career in electronics I'm thankful I'm still in the game. I could have used this power filter kit 30 years ago when computers were much more sensitive to transient spikes.

@philipspencer1834 4 жыл бұрын

Big Clive.... excellent video. I love your style of presentation. Most diverting. Thank you 😊

@johnbravo7542 4 жыл бұрын

Clive,you got that unintentional ASMR going,with your voice and the way you do things,it is great :)

@DavidBTB 4 жыл бұрын

Clive just called me, "Very old." Now I know it's true.

@Rvannly 4 жыл бұрын

Just bought a Chinese CNC 6040 machine. Found a very similar board in it. Has a very similar layout and components, minus one capacitor but added discharge resistor. Thanks for the video bigclive

@Abhorsen6930 4 жыл бұрын

Oh you bring back so many memories of the fan-fold dot matrix printer paper... Of course, the printers were massive as well...

@klarahfenderson1374 3 жыл бұрын

Okidata still makes 'em that way. I got a used 420 (though they're available new for a hefty sum). Thing weighs 20 lbs.

@mysock351C 4 жыл бұрын

Having the skirt at the bottom of the clamp is a nice feature. Had a set without those little aprons and lost track of how many times I've screwed one of the terminals down and then the wire just falls right out.

@bigclivedotcom 4 жыл бұрын

That's the big problem with the circuit breakers. They're locked in position, so you can't tell they missed the busbar.

@wilfredswinkels 4 жыл бұрын

Finally! common mode noise well explained! noise on both "input's" cancelled out by the coil. Thank you. I learned something. :-)

@techydog7854 4 жыл бұрын

How well would mini Babybel cheese work in place of the MOVs?

@daanwilmer 4 жыл бұрын

Regular or light mini Babybel cheese?

@vcolinc 4 жыл бұрын

It's funny you ask, because this is exactly what was used in the olden days before they were invented!

@allancopland1768 4 жыл бұрын

The easy way to find out is to try some.

@beeboopopper6825 4 жыл бұрын

Watching some of your other videos Clive, I saw those side cutting snips you use. I bought two, and they are fantastic little tools, terrific value, and really handy. They cut fingernails too lol.

@bluerizlagirl 4 жыл бұрын

There is only one thing you need to learn about lead-free solder: A _good_ joint made with lead-free solder looks _exactly the same_ as a _bad_ joint made with lead-free solder.

@frankowalker4662 4 жыл бұрын

Sprocket fed fan-fold paper, I still use it sometimes with my 9 pin dot matrix printer and Amiga.

@ColinJonesPonder 4 жыл бұрын

Hey! I've used fan-fold printer paper at home! 😂 Oddly enough, I have a photo of my daughter (now 21, then about 3) on my cork board, printed with a dot matrix printer on fan-fold paper.

@tin2001 4 жыл бұрын

Colour or mono?

@juststeve5542 4 жыл бұрын

I think I threw an FX80 printer out within the last 5 years.

@alanjones3873 4 жыл бұрын

Yes, your soldering dexterity is awesome!

@ozzstars_cars 4 жыл бұрын

Nicely done Clive

@Barty.Crowell 4 жыл бұрын

I'm kinda disappointed you didn't connect the Earth connection

@johncrowerdoe5527 4 жыл бұрын

@@vobbertbecking3598 The MOVs will still catch high surges exceeding 2x470V .

@TheDutchGuyOnYT Ай бұрын

😂

@samuellourenco1050 4 жыл бұрын

Learned a lot watching this video, Clive!

@thehappylittlefoxakabenji8154 4 жыл бұрын

its always the way I have soldered stuff even resistors and diodes if you linger with the soldering iron the component can get very hot if your holding the component flat to the board from the other side ! I learned to solder quickly !

@CrazySparkie63 4 жыл бұрын

Thankyou so much Clive for making me feel old with your various reference's, but then I realised that I was biting off pieces of Mum's 60/40 rosin cored solder (and chewing it) before you was a sparkle in your daddy's ballbag!

@Gameboygenius 4 жыл бұрын

"We must ban leaded solder because the kids are eating it!"

@jasonkuehl639 2 жыл бұрын

Every time Clive mentions the bandoliered components, I wonder if a dot matrix printer could be modified to feed pieces into a diy automatic soldering system. I think this is the first time I've heard him reference fanfold paper, though...I can't even begin to think of how many boxes of it I must have bought back in my early computer days. Suddenly I feel like I'm ancient. Thanks Clive! 😆😆

@johndododoe1411 Жыл бұрын

Most of the bandoliered components are more like 8mm films than 8" paper. So the sprocket is much smaller.

@LORD-xg2ks 4 жыл бұрын

"Take this off briefly so I can just slip it in. MMMMM"

@gregorythomas333 4 жыл бұрын

Just the tip...and only for a minute

@I_am_Allan 4 жыл бұрын

The "mmmmm" was what made me laugh.

@AlanLiefting 4 жыл бұрын

Can you explain what it means? lol

@tomelner 4 жыл бұрын

Nearly spat my morning coffee out.

@CanadairCL44 4 жыл бұрын

And just mash it in to any random hole!

@raymondmucklow3793 4 жыл бұрын

It never gets old your assembly videos. Cheers from unusually warm kansas, and congratulations to the Chief's for the superbowl win. Cheers.

@kevinh96 4 жыл бұрын

Company I work for still uses industrial dot matrix printers and fan fold paper for invoicing, I have the joy of listening to them screeching away in the next room every night.

@mpf_agundipsht3619 2 жыл бұрын

Used to use a hand cranked resistor cutter/former machine when i worked PTH, Also worked and maintained the wave solder machine and racks and did QC on the finished products

@fuzzy1dk 4 жыл бұрын

properly soldered the solder wicks through and solder both sides. if it is big concern you could just mount the components on the opposite side

@Anvilshock 4 жыл бұрын

Good point!

@robodock23 4 жыл бұрын

You really have a grudge on them for those small pads😂. Keep it up man love your videos!!

@bigclivedotcom 4 жыл бұрын

Small pads and pointlessly thin tracks. Things that make PCBs less reliable.

@victortitov1740 2 жыл бұрын

i do too. I work as a lab equipment repairman, and lab equipment boards are notorious for having inadequately tiny pads connected to inadequately thin tracks, that together with inadequately narrow holes in the pads and the use if these pads as free vias makes replacing blown components a true nightmare.

@and7barton 4 жыл бұрын

Those side-cutters are brilliant. They are also perfect for effortlessly trimming your toe-nails.

@Anvilshock 4 жыл бұрын

In fact, I've used them to trim claws of pets who needed a little help wit that. The cutters are so sharp that they cut with ease. This makes the whole procedure faster and also reduces the forces transmitted by grabbing the claw until it's cut, all to reduce the discomfort for the critter.

@denislostinlondon199 4 жыл бұрын

I was taught to put components into a PCB with all the markings in the same direction. It makes fault finding easier. I passed the Radio Communications General Certificate a couple of years before satellites made it obsolete. That dates me as much as my bus pass.

@dashcamandy2242 4 жыл бұрын

It's nice to see a cameo appearance from Alice1101983! The clearance (or lack thereof) between the traces and screw holes is quite concerning... I miss fan-feed dot matrix printers... Somewhat. Sure, they were noisy as heck, and slow, but the ribbons were cheap and the printers had some actual weight to them. I remember my ImageWriter II used to cause the table it was on to shake during printing.

@Chris_Grossman 4 жыл бұрын

Your magnetic flux flow is wrong. When the magnetic fluxes oppose, they cancel and the inductor does nothing. This is the normal operation. When the magnetic fluxes add it has inductance that oppses the current flow. This is the state that attenuates a common mode current.

@WolfgangMahringer 4 жыл бұрын

Exactly what I thought...

@daveansell1970 4 жыл бұрын

I thought that was wrong too. If current flows in opposite directions the field should cancel so inductance is small, common mode the field will add so inductance is large.

@jyvben1520 4 жыл бұрын

@BrackynMor need the car, maybe the new tesla truck which looks a bit like ...

@sleeptyper 4 жыл бұрын

@@jyvben1520 A flying locomotive will do too, as long as it can reach 88 miles per hour.

@andreasdill4329 4 жыл бұрын

Just wanted to write the same, but you explained it already perfectly.

@asvarien 4 жыл бұрын

When placing components onto a board, if you spread the legs of the component slighty it will hold itself to the board without falling out making it much easier to solder.

@johndododoe1411 Жыл бұрын

Not always possible, depending on the legs. Of cause SMD makes this easier as they don't face down during soldering.

@cqix 4 жыл бұрын

That's how we learned to solder: Start with phone connectors, then go quickly to 5 pin + DIN connectors to solder on wires. The process then is a combination of swear, hate and soldering. But in the end you know how to solder.

@jijzer3284 4 жыл бұрын

@BrackynMor that is the only way to learn it

@cqix 4 жыл бұрын

@BrackynMor Not had that issue so far. But I know of the difference between a good and bad solder wire and especially solder iron.

@s8wc3 4 жыл бұрын

At least here in Australia element14 still sends their packing slips on fan-fold paper printed with a genuine 9 pin dot matrix printer. Nice.

@rich1051414 4 жыл бұрын

That common mode choke would also take the edge off of choppy modified sine wave AC, which can make audio equipment annoyingly buzzy. Though I don't know how much edge it would take off, doesn't seem like it has a very high inductance. It would still do something though, as the inductance of the choke would resist the sharp voltage(current) rise of a stair stepped waveform to some degree.

@Gameboygenius 4 жыл бұрын

Wouldn't do much exactly because it's a common mode choke but the modified sine is a differential mode signal.

@stephenbell9257 4 жыл бұрын

It won't have much effect on audio equipment. Common-mode chokes really only affect noise in the range 100kHz through 30MHz, which may help reduce audible noise on an AM radio or a SW radio.

@railgap 3 жыл бұрын

There seems to be enough combined reactance - although some series independent inductances would be very helpful - to significantly reduce the hash from ubiquitous cheap phase angle dimmers, the bane of HF / DX radio operators / listeners the world over. They and other industrial hash are why many hams choose to move to the boonies to pursue their hobbies. Most houses, and certainly all businesses, street lights, etc, etc, are hella noisy both in radiated and line conducted noise.

@testbenchdude 4 жыл бұрын

I was taught to snip and then solder by the Navy (as well as many other useless soldering techniques, like forming perfect hooks for joining wires). Even though it has been many years since then, and I also prefer to solder and then snip, it still triggers me. Like somehow that tiny little bit of exposed copper is going to doom us all. Thanks, Navy. And ahh yeah, that continuous sheet of printer paper. So cool. I remember when my dad splurged for the micro-perf stuff for our 24-pin dot matrix. My school reports looked so good. :)

@petehiggins33 4 жыл бұрын

When I worked in the Aerospace industry the rule was always cut first and solder later to avoid mechanical shock of cutting the wire from cracking the joint. It's rather difficult to repair a bad joint in a satellite 35,000 km up in the air. Of course it's all surface mount now.

@CollinBaillie 5 ай бұрын

Would solder, snip and re-solder work? Just because it would be so much harder to keep components in place with snipped leads.

@chrisw1462 4 жыл бұрын

You solder _so_ much better than most KZfaqrs.. Every time I see someone feed several inches of solder into a 1/4 watt resistor joint, I groan to myself. Then they move something while the joint is cooling and you can see the solder crystallize, and a Peanuts(tm)-esq "Arrggh!" escapes into the real world. Don't get me wrong, it doesn't bother me so much that they screwed up their own project. I _do_ care that some large number of viewers are going to see it and think it's a good solder joint.

@DrJugne 4 жыл бұрын

If the soldering life and neutral on the wrong side bother you, you could just populate the board from the designated solder side, it is symetric. Furthermore, to get a ‘thicker’ earth connection just add solder to the non-screen-printed copper on the PCB.

@00Skyfox 4 жыл бұрын

I printed on tractor feed fan fold printer paper just yesterday. I was doing a test print from my Commodore 64 of a spreadsheet I was working on, and with green bar paper no less!

@braeburnhilliard8340 4 жыл бұрын

I should have known the other video was only about a minute long that this one was going to be good! Be sure to slip it in nice and easy!

@whitcwa 4 жыл бұрын

Not only do I remember fan fold paper, but fan fold punched paper tape was used when I took my first programming classes.

@samb3706 4 жыл бұрын

The wide area in the earth conductor provides shunt capacitance from the two x2 capacitor to earth. I do not know what the capacitance line to ground is, but it is a clever circuit trick!

@clownhands 2 жыл бұрын

The bigclive Vulcan death grip is the most important soldering flex on KZfaq

@Chlorate299 4 жыл бұрын

Big Clive soldering things together is kind of like the electronics version of Bob Ross. Can we send him more of these kits? This is quite theraputic.

@shanejohns7901 Жыл бұрын

Let's hope he doesn't get stuck with a hairdo that he doesn't like just to resemble his logo image. Or in Clive's case, perhaps his beard.

@steverpcb 4 жыл бұрын

Commen mode chokes work like the + and - of balanced line, a video explaining about balanced line would be great :)

@Sloxx701 4 жыл бұрын

Definitely check that common mode choke because sometimes cheap ones from China are made of aluminum and just coated to look like copper, and it will have quite different characteristics than an actual copper choke.

@PurityVendetta 4 жыл бұрын

I liked fan fold paper printers. When I was at uni I could print out assignments in one of two long continuous scrolls. I'd then physically cut and paste edit it on my bedroom floor. Perhaps not to everyone's taste but it just suited the way I liked to work with a full overview. One the subject of work wear I use those military surplus British AFV type flame retardent ones. Essentially armoured vehicle overalls. So many useful pockets and all zipped. I buy then big enough to go over thermals in the winter and to be a bit baggy in the summer. My partner who does all the welding and fabrication swears by them as she creates a lot of sparks and fire 😊

@matthewweaver1123 4 жыл бұрын

Hey Clive, I should have done a shot everytime you pointed out the small solder pads 😆

@nutsnproud6932 Жыл бұрын

I might build one of those kits just to hear the bang when I sort out the caps with pliers.

@mikehibbett3301 2 жыл бұрын

21 minutes in, when you are soldering the screw terminal, I notice you are using all five fingers to hold the pcb. I remember a few years ago a software engineer watching me soldering a PCB at work. He quietly said "You are using all five fingers..." I smiled, but I was also surprised that yea, I was. I forgot it's just a skill we have. I guess it's like touch typing.

@combowumble 3 жыл бұрын

Clive! At 35 I know exactly what fan-fold printer paper is. They were still using it in the computer lab when I was in elementary (or primary, if you prefer that term) school in the '90s!

@tcmtech7515 4 жыл бұрын

You explained the common-mode choke filter backwards. In normal operation the two windings cancel each others flux out thus giving a very low impedance. When in common-mode filtering they work together to create the high impedance to the high frequency noise signals.

@samfisher1890 4 жыл бұрын

Love these vids

@giulianofiorotto3529 4 жыл бұрын

it would be awesome to see a proper pcb design using those components!

@steveoffer2917 4 жыл бұрын

1) Thank you the excellent review. 2) I would have liked to see if it passed test & tag for both normal and medical areas. 3) I would have liked to see common & differential mode transfer functions with movs & alternative caps.

@bigclivedotcom 4 жыл бұрын

It wouldn't pass any test because of the proximity of the live track to the mounting hole.

@that_teegor 4 жыл бұрын

Very old, me. Speaking of fan fold- There was a live stream a few years back where Tom Scott and crew printed the comments from a live stream and fed the result directly into a shredder. I do wonder how many viewers had ever seen a dot matrix printer before.

@richardbrobeck2384 4 жыл бұрын

I was going to say the caps on the paper reminds me of film for film projector

@pulesjet 4 жыл бұрын

Those are pretty much a Must if your employing a Buck or Boost circuit for circuits requiring low noise.

@artiem5262 4 жыл бұрын

11:35 -- someone who has done this for a long, long time! holding the soldering iron in one hand, and in the other hand holding both the solder and the board... And again at 13:50, holding board, component, and solder in one hand. I'm with you on leaded solder -- the only whiskers I want are on my face!

@DasAntiNaziBroetchen 4 жыл бұрын

What's the problem exactly?

@nickpelov 4 жыл бұрын

bedides cspacitive load there is a bit of inductance in series with the two caps, so it's a bit more complex than that.

@adventure_F0x 4 жыл бұрын

Anyone working at Argos will be well acquainted with the fan fold printer paper, was still being used when I was there a few years back, love the stuff

@AureliusR 3 жыл бұрын

Alice is one of my favourite ebay sellers. And other sellers have figured that out and name their shops similarly, you have to be sure it's the original alice.

@zackstewart4109 4 жыл бұрын

I did my own little time and motion study with your solder technique vs the standard and I could build circuits faster your way. I don't do it any more though, I'm paid by the hour :)

@michaellitscher9456 4 жыл бұрын

Using MOVs between neutral, ground, and hot is pretty common in the USA inside of cheap power strips that claim to provide protection against power spikes. They are sacrificial, and I don't know how much of a voltage spike they can withstand before letting the magic smoke out.

@wiedapp Жыл бұрын

I might be a little late to the party, but for what you do on your channel, I couldn't suppress a little snicker when you said you misidentified the MOVs for some Y-CAPs at first...😂😉

@davidfalconer8913 2 жыл бұрын

Handy tip ( ? ) .... when taking apart discarded microwave ovens ( for all manner of useful stuff ) , there is almost always a FREE filter board near to the cable inlet ( this will save you £ 2-55 ! ! ) ... FYI a ( brittle ! ) magnetron magnet can be stuffed onto a wood broom handle with a plastic spray can top screwed into the end of the handle ( this protects the brittle magnet from knocks ) ... MOST USEFUL to pick up dropped steel wood screws / drill bits / nails from your floor / DRIVEWAY ( tried - n - tested ) ....

@Pippy626 Жыл бұрын

Love the videos and I’m the same way the components have to be the same direction.

@keithmiller1982 4 жыл бұрын

When I first saw you solder that way I thought "so, I'm not the only one that does it that way." Now based on your comment at 14:05, maybe it is weird.

@Scotty916 3 жыл бұрын

Would it be possible to show the filter in action with 2 channels on an oscilloscope? Maybe purposely introduce line noise and see how well it works?

@MrWarwick15 4 жыл бұрын

Cool! Thanks Clive. Rich.

@tobiasjames6949 Жыл бұрын

A filter circuit board like this really should be a single layer copper design, so you can see and thus know there is correct gaps

@JanCiger 4 жыл бұрын

+bigclivedotcom BigClive, those MOVs are there to protect against mains transients. A capacitor won't do that. It is a common solution in mains power supplies. However, a very good idea is to put a fuse in series because if the MOV eventually fails, you have a dead short to ground, as you have mentioned too.

@railgap 3 жыл бұрын

Not IF, but WHEN. Every time even a small surge turns on the MOVs even for a split instant, every firing results in the loss of a small amount of the active surface area on one of the junctions. (I used to know the details, it's look-up-able, but the manufacturer's don't talk much about life degradation effects in their literature) so over time, all MOVs eventually fail in normal service. Ergo, all MOV-protected circtuits should include fuses, because when MOVs do fal, they sometimes fail shorted. Don't make the line cord or circuit traces your fuse.

@bm830810 4 жыл бұрын

@7:38 I think you explained the opposite, In differential mode the current counteract, flux would be zero and hence no voltage drop on the inductor,

@bigclivedotcom 4 жыл бұрын

I think I did. I'll address that in a future video.

@drewf64 4 жыл бұрын

I was about to comment the same. Where the magnetic fields from the windings cancel there is no impedance and therefore no power dissipation in the choke. If they add (common mode) you get impedance.

@twotone3070 4 жыл бұрын

@new name As I understand it, under normal circumstances the field created by each coil cancel each other out and hence produce no back EMF as the voltage rises and falls. If noise is introduced, the difference between the fields in the inductor will be the effect of the noise. This magnetic field as it rises and falls will induce a back EMF opposing the very voltage that caused it.

@LailaKumaki 4 жыл бұрын

Americans might know that printer paper better as "tractor-feed" printer paper. People thought the sprocket wheels looked like tractor wheels for some reason. That style of printer was commonly available well into the 90s, so it isn't just for the old and wisened to remember.

@felixcosty 4 жыл бұрын

Bigclive just slipping it in, with a nice satisfying sound. 3:24

@patrickjmorgan 4 жыл бұрын

Toe-Guard (the piece of aluminum that supposed to stop people inadvertently falling down lift hoist way) - except if they are impatient and as happend some years ago in a hotel in Scotland, didnt live to tell the tale.

@smithaustin2009 4 жыл бұрын

Clive, any chance you could do an ELI5 of power factor or "power factor for dummies" type video? Or maybe just as a side note in any given video? The term comes up a lot, and I understand that it's a comparison of apparent vs. real power, but I think some of us could benefit from a simplified explanation of WHY there's a difference in apparent and real power and where it comes from.

@gavinward1758 4 жыл бұрын

I ordered some 100W linear COB LED floodlights off AliExpress (I don't think you've featured this particular type in your video) - the first lot I bought had two 30W drivers (so not really 100W). The next batch had an empty space in the back where the drivers used to be and instead used 100W COB LEDs driven directly off mains voltage - the kind where all the components are covered in that rubbery coating. These ones all failed, some in days, some in weeks. When I went to order replacement LED modules to repair them, I noticed there were two extra components that weren't on the ones that failed - those very metal oxide varistors. Wish you could still get the ones with the drivers really. I'd have a lot more faith that they'll still be working in five years. Also they don't flicker.