I like that mate - I might create a playlist and collect them in one place

@@ThinkingandTinkering A playlist is a very good idea!

lol - we are a nation of tinkerers mate lol

What a good story. How about a half Dutch, half English Australia?

@@ThinkingandTinkering im Irish and i agree 100% with ya. and i also noticed that alot of Canadian guy's do alot of electronic videos too. but i don't understand why we don't see more Irish guy's on you tube coz ya wouldn't believe how many guys tinker about in their sheds making and fixing all sorts of things. (but then again most eccentric people are sort of shy)

My Mother's from near The Zouder Zea!! Opposite the Friesland Isles, Although, I am not too sure about if there's Any Zea, left, bearing in mind how efficient the Dutch are at Reclaiming Land!! (* I Always suggest that we get Dutch Engineers in, when we are having problems with 'Flooding' here in the UK, but up to now, no one will take me seriously!! Dankje. XxX

Hi, great comment. This video is to explain some basic principles to viewers. The 100 ohm resistor you mentioned is not needed in this low voltage application. The capacitor won't be killed easily here. Those ancient vibrator relays have a dead weight tuned to low Hz. They look like those tall earlier telephone relays. Modern Electro mechanical Relays are not specified for million cycles. May be 50k. These mechanical relays will not operate at 200 Hz because of the physical limitation. Open and close times around 10 msec each. 200 cycles per minute is already considered very high. Even these we have use special relays. Regards.

Thank you mate and thank you for taking the time to say so - all the best

I agree - I did this because it is exactly the basics of current modern inverters

No that's false. You read Books on electric engineering pre 60s and you will find much more useful info than today. And they admitted to not being able to account for energy in a closed system that would blow up devices This is Maxwell and Teslas Math... Today it's all lies in every science

@@cassdroid2183 That's Exactly what is being said!! I hope you realise that you are agreeing, despite what you said in the first paragraph that you wrote?! Namaste 🙏 Andrea and Critter Family. XxX

Well done m8🙂

Good job! Rescued one myself, also (membrane keypad was corroded, so I wired in some pushbuttons for the necessary functions). Pain cave made me LOL

I just love that story mate - well done you and thank you for sharing

Much less these days, but you'll certainly piss off Hams for quite a ways away.

Make it inside a microwave.

if you really wanted to do this you just put it in a can like they used to - this was used in car radios

Absolutely, RM-S! radio inside the passenger compartment, aerial on the fender, but DC generator commutator , voltage regulator contacts, distributor points all potentially causing noise. Spark suppression was in a field all its own. Solutions are out there, our fathers and grandpa's had it all down pat.

yeah, i just replaced a voltage regulator on an 1950ies hanomag, the old one is still jumping along at 16V, I now may hook it up to an old transformer and make myself a variable AC powersupply.

cheers mate and have a great day

There are so many ways to make Ac current. I found another on u-tube. Lookup : Ruhmkorff Induktor with elektrolytic Interrupter. Basicly two dissimilar electrodes in a weak acid add about 30volts Dc and it oscilates.

I know the kind you mean mate and I love them

We have always called those dynamos

Many machine shops use them especially when there's no 3 phase incoming mains available & needed to power 3 phase equipment. Simply use a 3 phase motor (large enough to handle the electical load [i.e. 20 or more% greater than the load]) and presto....you're in business.

awesome mate

I agree mate

cheers mate and yes you could

lol - cheers mate

I do cover quite a bit of ground that's for sure - cheers mate

Glad you enjoyed it

It's a pretty cheap and easy thing to make mate - give it a go and share the output

Wow, thanks and yes once it was the height of tech - ah how things have changed lol

Glad you enjoyed it

Yup... 1957 Chevy from my youth... remember that HV step up arraignment pretty well.... and waiting for the radio to "warm up" before it would start to output audio...

lol - exactly where I got the circuit from - I just cut out all the stabilising stuff

it's sort of where we are heading with this mate - I like the mechanical version because it shows the logic and operation in a way that can be 'seen'

I love old tech mate - it teaches us so much in a clear way about what we are doing now

it was quite an arc lol

You like arcs.... Make a capacitance charger.. I ran it with 2 (used for Browns gas generator I have) Put 2pieces of charcoal and put them under water in a bucket. Nature of capacitance charger allows you to pull the charcoal apart increasing the arc back and forth. I'm not too skilled but piss easy to make just caps and bridge rectifier. I used it for a Alchemy experiment making Iron. 2 Carbon molecules + 2 Oxygen make "a type of" stainless steal Human resonance. Org

@@cassdroid2183 sounds really interesting . You should make a video mate

cheers mate

sure would like to see how easy your inverter was to make.

I think so too mate - cheers

I am afraid it can't switch fast enough

lol - pretty much the plan here mate lol

lol - cheers mate - I got the idea from Picasso

lol - for sure

for sure mate

Thank you! Cheers!

wouldn't that mean you need 10 12 volt batteries to run a 120 volt appliance instead of running 1 battery through a relay and a transformer, that cost half a battery and don't need to be charged?

@@williamburdon6993 Yes, it means you need more batteries. However, in the long run it'd be way more efficient as there would be no power lost transforming the voltage or powering a relay. If you're stepping up the voltage you're going to need the battery to provide a lot of current. For every 1amp of 120v you're going to need 10amps of 12v from the battery and that isn't including transformer losses. Current demand is what results in a voltage drop and more current means more power lost due to resistance that becomes heat. Yes, 10 batteries are going to need charging for 10x longer but 1 battery is going to need charging 10x more frequently, thus reducing its lifespan by 10x. Whichever way you look at it, it's always more efficient to start with a higher voltage and use it as it is.

I agree the real answer is to change the equipment used to DC - after all most of it I DC already and ac is really only used to transport then changed back to DC for loads of things

True, this was common technology. My Dad told me about working on the Vampire (1950's, one of the first jet fighters, used in the RAF and RAAF, amongst others) that employed this to obtain high voltage.

I believe they were called dynamotors mate

compositor... condenser???

@@jbodden6977 condenser, where did that mp come from

awesome

yes you could

I... accidentally deleted the reply I typed. Trying to recreate it from memory: Looking at this circuit, I don't think an H-bridge is even necessary! You just need some way to generate a square wave at the desired frequency (555 timer?), and use it to somehow switch your high-amperage DC side (Preferably with something less noisy than the improvised contactor shown, one DC SSR should be enough, in other words, as long as it can handle the power. Needs to be pretty powerful, though.). This eg. 0-12V square wave side goes through a transformer, and the AC coming out the other side has the same peak-to-peak swing, multiplied by whatever the step-up factor of the transformer is (-6 to +6V for a 1:1 transformer, -60 to +60V for a 10:1 transformer, etc.). Voltage is relative, so you can redefine your "zero" freely between the sides of the transformer. The only actual output it produces is the difference between its output terminals, and that only cares about the difference between the input terminals. The "average" of both sides can be completely different (as long as you don't connect between them)! Super clever stuff! Keep in mind that the peak voltage of an AC square wave and the RMS voltage are different, though! You'll need to do some unexpected mathematics when selecting your component values if you want to provide comparable 'voltage' to a traditional sine-wave AC grid! That said, if you need AC at a voltage you can easily achieve for DC, an H-bridge might make more sense. I think this is more for producing bootleg (square-wave or otherwise malformed, but correct frequency and VA) "mains voltage" AC, as you would in some sort of emergency or off-grid power system (as he said, you won't be running any delicate electronics off of this, and some kind of motors might also be unhappy. It should run lights and heaters intended for mains voltage though, and maybe other stuff too! Keep in mind that the power supplies used in 'mains voltage' LED lights vary greatly. Some won't mind it at all, some might not work, some could even break, it all depends on the specific circuit used. No idea how fluorescents work, but they have a lot of electronics behind the scenes too, as well as being scary high-voltage gas-discharge tubes, so I would be afraid to try them with power sources they weren't designed for. Keep in mind I'm not an expert, I just like to read/watch things like this. The books I have don't really talk about AC stuff a lot, and even less about non-sine waves, so I may have the wrong idea about any or all of this. Stay safe!

I used a DIN rail relay because it easy to see but Omicron make relays in the order of a pound or so with 100,000,000 fillips - and I din't get that wrong - they switch with that order of life - but the noise is an issue unless you put a piece of felt around it - An SSR can't switch fast enough.

Thanks to both , in terms of frequency i had thought arduino could be used to create the frequency for 50 a second. In terms of step up i got hold of a 240 to 12 AC transformer and was hoping to go in with the 12. For ssd not being fast enough, i could be mixing things up but i think the idea is a single one would only handle a half AC cycle but doing the H bridge would give you both half cycles (yes, square form). There are ssd on ebay for high amperage (i thought i would target to use half the max rated amperaje). I am also not a specialist, just dabbling and never enough time to finish things but this one i want to finish one day, i have a second 240 to 12v AC transformer, not sure of wattage now but its a 16kg beast 😅. Overall to use with a hot plate not electronics. All part of a wider thing... Damn the castles in the air and not enough time...

@@TheBlackadder-Edmund That all sounds good, except the use of a microcontroller as a frequency generator. As it's going to be exposed to whatever electromagnetic noise this inverter makes, and whatever poor-quality power source it's connected to, and the sudden power drops on the DC side from the AC side being connected to a load, I would be worried about a microcontroller potentially crashing here -- keep in mind that, if it crashes while generating a PWM square wave, there's a 50-50 chance of essentially shorting your DC supply across the transformer. Maybe I'm just overcautious, though.

Yes it's called an ac voltage regulator and they are really energy hogs but some older small commercial hydro plants sold them to customers for sensitive computer equipment in the 70s 80s and 90s

I am sorry mate - I get your point and don't disagree but there is a lot to be learnt from this tech is what I think and I get the impression there is a degree of discounting that in what you are saying

@@ThinkingandTinkering unlike your video on magnet amplifiers, I think this technology is better consigned to the history books, particularly due to its poor efficiency and it's potential for generating EMI. You may be interested to know, that my first amateur radio was an old Pye Cambridge am mobile transceiver. ( I still have it). This was of the benefaction that used OC23 power transistors for the inverter that generated the high voltage power for the transmitter valves The output stage was a QQV310. As the internal chassis, was punched out for a valve FM modulator, I latter added this stage allowing the transmitter to transmit either AM or The new fangled FM. By the time I retired the Cambridge it was something of a hybrid. It used a integrated circuit connected to the if to demodulate the FM signals. It had a dual gate MOSFET receiver front end amp an first mixer, and a CMOS CD series crystal switching stage, that used pin diodes, to allow the receiver to scan at a whole 10 channels of the amateur 2m band. The whole thing required about 10 Amps from the 12 volt supply to give about 6 watts on AM and about 10 watts on FM. It was the size of a suit case. Today, far greater functionality can be achieved in the size an old cigarette packet.

lol - My pleasure mate! - I love it too

lol - now that's the truth lol

cheers mate

Sine wave... Rather than running the fet as a voltage controlled variable resister. You may be able to run it as a class D amplifier. Loads of circuit examples of such. But pretty much a pwm signal that ramps up and down in duty, switching a fet between off and on... followed by a low pass filter that blocks the pwm switching frequency, but allows f of Sine wave through.

@@stevecummins324 yes, this is what I meant, it pumps the switching frequency into a transformer to achieve the best possible 220vAC wave as possible with the purest possible sine wave as a result.

@@stevetobias4890 the inductance of the transformer input coil will itself act somewhat as a low pass filter. Add a capacitor across it if you want to further lower the maximum frequency it'll pass. (LC low pass filter if you wanted to calculate values, rather than determine experimentally) Pwm signal frequency at least double the output frequency. And low pass filter cut off f between pwm and output frequency. Higher pwm frequency won't make for cleaner output... But will allow small component values to used in the low pass.Most FETs can cope with 1kHz pwm speed and that's more than enough for a 50/60hz output. Pwm signal could be generated by a Sine wave oscilator circuit, a voltage comparator and a ramp waveform generator of 1khz frequency. *but* arduino probably easiest.

@@stevecummins324 thank you Steve (great name by the way) 👍

awesome mate - sounds like a good project

oh the output of this is useable mate - I think you might mean stable - but the answer to your question is yes - it would still be a square wave

That would mean running the motor very slowly. Accurate speed control would be difficult, I think running it at a normal higher speed and gearing it down...it would take 100's:1 ratio such as a worm drive.

@@nil5221 yes, maybe a modified timer motor, just throwing some ideas out there, thanks for the great videos.

they did that mate they were motor - gen sets or dynamotors

yes - I am not sure on what the output will be. like but you can pretty much use anything - it just gets better with better selection of components but pretty much anything will do

no 0 I don't think so

I am sorry mate - I have to disagree with a part of that - this was a predominant tech and issues like lifetime were overcome to a degree - so I can't agree with the 'in a pinch' argument - plus there is a lot to be learnt by looking at how they did it and making it to give you a hands on feel of what is involved in inverters

@@ThinkingandTinkering Relay contacts are rated in 100's of 1000's and chattering at 50 times a sec is not "normal working conditions". They would wear out quick smart.

as you no doubt have gathered from my posts, I really do not like relays.

I am sorry mate - that's not right they are rated in the millions of flips - the one I used is rated at 100 million flips Moicron do ones with higher ratings

lol - no I got that - but it's like anything to my mind - useful for some stuff

lol - that is awesome mate and thanks for the cap tip

you could mate on both counts

Yes but how to get high DC voltage when you've only got a 12v battery? A step-up transformer needs AC (or pulsed DC in this case)

@@nil5221 For that, we don't worry about output frequency - you can also use a spark, that's what Tesla did.

if you have never done it try taking a strip light down to an overhead HV supply line - it will just light up - it's quite awesome

@@ThinkingandTinkering I have Tesla coils for that kind of fun.

A quick patent search will show you that original electric clocks ran on earth batteries

good enough mate lol - cheers

Would you do a clip on hydrogen technology, I believe it is the future of energy.

a capacitor in parallel with the relay coil will do it mate thought you would need a DPDT relay as you would need to connect the output to a different switch to help prevent frequency drift

Let us know when you get that done