The painting gift is so extraordinarily sweet and kind. You should be proud of your impact Dave.

Thumbnail at 12:24 thank me later!

Each ruler is a decryption key - all you need now are top secret documents to use them on! The holes reveal the plaintext.

WARNING: Apply to input (FEED) jack only! Applying to output jack will overload your device. 26:13

I like rulers that don't have the 0 at the end, because when it inevitably gets damaged on the ends, you can still use it!

fyi: The City Köln is internationally known as Cologne

I actually really like the painting. I know a lot of people online are super harsh on art that isn't some renaissance grade piece of art. But I myself really like abstract art. I love the texture on it was well :D I also like Dave's voice :D It grows on you, it's quite comforting.

first "dc/dc" module pointed at looked like just a common-mode filter

Ref 12:24, when I was in the USAF in the early '80s, we had special processing equipment in what we called 'the vertical drawers' in a 19" rack. If our detachment was overrun by anyone, the on-duty equipment operator was to set off the built-in mini shape charge that would blow a hole through the set of circuit cards in the vertical drawers. The cards were wire-wrapped so there wouldn't be any circuit board bits that might be possible to reassemble by the bad guys. P.S. Apex is still selling those 'DANGER' switches on their eBay store. $40, +$5 shipping.

Them bike lights have a clue as to where to fit them, they're called "TireFlies"............ :P (Hint: They attach to the valve stem on the wheels!!)

Those flashers screw onto the valves.....centrifugal force turns them on....

The red explosive devised can be found in the WW2 B24 liberators. They are used to destroy the very early auto pilot

Hey Dave, I work as an ASIC designer at Nokia (formerly Alcatel-Lucent), and that board (or at least its form factor) looks quite familiar to me. I'll ask around to see what it's purpose was. Seems to be the processor platform for either a core/edge IP router or for a fixed access (DSL/PON) street cabinet. Wouldn't be surprised if those 2 other heat sinks had some Xilinx FPGA's underneath them. I'm sure our board teams will be honoured to be featured on this channel. As you said, these systems take a huge amount of effort to design, but no one really gets to see their (beautiful) guts :)

That meter had to be a troll, you just can't escape it... But it's awesome that you showed it

As an old Air Force Radio Repairman, that 50 Ohm dummy load made me laugh.

The alcatel lucent device at the start is a line card, It'll go in a router chassis. Each line card will have it's own processor and memory to be used by the device to perform packet forwarding for the interfaces on that line card.

Hi Dave, Thanks a lot for showing off my ReflowR. I hope you try the test PCB soon, I am sure you will be impressed (even with the scraper/squeegee). The key to getting the “thermals” right is the proper ramp and soaking times, this ensures the entire board heats evenly and thoroughly. Looking forward to you trying it out. p.s. You can also now find it on tindie.

The two flashing lights at 21:29 look like they go on the bike tire fill valves. Probably activate when the spring of the switch is forced out from centripetal force.

29:00 Nice asbestos block - scratch n sniff!

My mom watches your videos because she fell in love with your voice ... i mean it creeps me out but i suppose its flattering xD

oh, it's a pacifier, I was not aware that dummy is the Australian and British English word for a pacifier. I felt a bit lost for a moment there.

Loved the video, Dave. And I ABSOLUTELY LOVE this channel. I'm not an electrical engineer, nor do I have anything but a rudimentary understanding of the subject, but your channel has helped me to become very interested in it and to learn more about a subject I might not have otherwise given any thought to. I hope soon to buy a kit of some sort and start getting some hands on experience and take my interest a bit further. Just wanted to say thanks for taking the time to make these and sharing your love of science and electrical engineering with all of us. Wishing you all the best.

I've grown quite comfortable watching a lot of channels at 1.25x, but I HAD to go back to 1.00 for eevblog.

I just love how you start your mail videos holding a huge knife😂 love your channel, keep up the good work!!

I've got one of those self-destruct boxes too - new off that auction site. It is a WW2 US unit to allow air crews to destroy radios, bomb sites, and the like before leaving an aircraft over opposition territory. Mine is just wired as two push buttons in series. Saw it - couldn't not have it.

Hi bro! I've had a go at reflow in a frying pan and it seemed to go fairly well. I took my time to get the soak time etc about right and it reflowed nicely. No board cooking at all.

The hotplate reflow method is actually the preferred method for some of the smaller maker shops because it works so well and is very economical. I think either Adafruit or Sparkfun use it exclusively for their limited-run in-house boards, having paid several thousand $ for a professional reflow oven and being disappointed with the results. I remember reading and a good tutorial on the process on one of their sites. I use a ceramic griddle to reflow the boards I sell on Tindie and am very happy with the results. I might actually pick a reflowR up as it would be nice to have the thermal profiles available.

Cutting towards yourself only really presents a danger when you have to put enough force on the knife, that if it were to slip, would cause you to stab yourself. Dragging a large, sharp (I hope!) knife through clear packing tape is really not very dangerous, unless you fall on it or something...

My grandpa always told me “You should always cut towards yourself so if you screw up you won’t have to live with the embarrassment”🤷‍♂️

I worked in an AT&T central office for ten years, but I'm retired now. I don't know about that exact cards, but we had to plug cards similar to that into the racks. Some of the cards we handled were worth many thousands of dollars each!

Interesting is that specific Core 2 Duo is a mobile SKU, it's a T7400 intended usually for laptops and similar stuff.

Haha. I was checking the links in the description section.The link to the ABC book was kind of funny. I got links to books about ABS. That was the only typo. The Bee Math ruler caught my attention since I was a mathematics major. Especially the third ruler about integration and differentiation

"I'm cutting towards myself because it triggers people". You're laugh certainly triggered my laugh Dave 😂

The box shown in the thumbnail pic is a IFF radio destruct push button module used on WWII Boeing B-17 bomber. it was mounted on the cockpit instrument panel so either the pilot or copilot could get to it in the event of a crash landing in enemy territory to destroy the radio gear.

At 30:00 has the earth pin of the IEC socket been cut off? Considering the device is enclosed in metal I would hope its earthed!

That knife is so Australian...

Always glad to see kickstarter advertising go to waste :)

Wow, dave didn't see the thread to stick them on the valves, and not even the bigger thread to take them apart...

I want what this guy is on...he has so much energy and enthusiasm. ;)

Regarding the Craigs / AMIS translator at the end, I actually had a job programming these, back in 1985! They were available as a hand-held computers (HHC), without the translation software, and you could load them with your own custom software. The platform was a 6502 clone, and development was made on Apple ][ computers. You had something like 2 or 4K of nonvolatile RAM, and the ROM chips were 4K. You had to use very clever tricks to shoehorn programs and data into it (I managed to squeeze a 10,000 number table into a 4k chip, WITH the program to expand it - and this was before LZW became widespread…). The HHC we worked on were used in the life insurance industry, where agents printed out (there was a thermal printer available for those HHCs) tables of benefits for the clients they visited. The machines were programmed in Forth, which actually produces code that is even more compact than assembler. Our job was to reverse-engineer a competitor’s product (the insurance company was pissed that they asked a fortune to update the insurance rate tables), so for this, we wrote a Forth decompiler that decoded the ROMS and spewed forth compilable code. We had lots of shits and giggle looking at the "source" code as it was very inconsistent, like if written by a committee of monkeys, which made out job of rewriting the custom software a lot easier, as we could hand-code programs that were a lot smaller. Oh, that inductor you wonder about is simply to produce the high-voltage for the fluorescent display.

That 50ohm dummy load is just perfect. Where can I get one?

That package from Ingrid was so sweet!

For painting- Follow along some Bob Ross videos. He tells you which paints you'll need and it's easy to get the materials. Landscape painting is really easy to do.

Those flashers, go on the tubes, on the fill valves. I also, wnet back and watched all of the video, in the archive! Enjoyable days!!!

The green light things are valve stem covers for a bike, light up so help people see you or just for fun.

There is a 555 Relaxing Station and a 777 Relaxing Station, both in Clovis, CA. They are massage parlors. "Under construction since 1868" apparently is a very old joke; don't ask me what it comes from.

Thank you for reminding me about that Cleveland video 😂😂

I do love your mailbag segments especially when you receive retro gear... I'd love to see more dedicated retro teardown videos.. HINT 😂 Cheers, Carl .... A newbie electronics enthusiast who grew up in the 80s 😬

"you don't need a qualifications to do electronics at all." I loved it. I am also a zoology student and dev regularly.i love this channel ❤️❤️.keep it up.

Having absolutely no memory of Fresno is almost certain proof that you have in fact been there.

I don't pirate my cable TV. I sometimes yell "ARRRRR" at the screen though... All my piracy is over the internet, not the TV! :P

Your voice is the best Dave! Even better in 2x speed.

The inverter in the Italian translator is most certainly to supply the AC voltage for the VFD filaments.

Don't feel bad about being late with the kickstarter, many of us save mailbags for months or years until we're sitting around with nothing to do. Here I am watching this for the first time 3 years later.

We haven't seen Sagan for ages... would be lovely to see him again!

That painting made me hungry, now i want some salad and fried eggs!

Honestly Fresno has the best interstate exit system I've seen. Though I've only stayed for a couple days and didn't see much traffic.

Dave, I must say; I do love you and your videos. You are a wonderful person with a life changing amount of information to give. Thank you. And about that voice of yours. It was the thing that made me stop my KZfaq surfing and watch your channel more and of course subscribe to it. I don't what is the allure of it; but you do have it. :D Thank You again!

The ABC basic connections book failed rather badly after he was unable to deliver it to backers.

Dave, the card you were questioning about at around 1:20 is a DSU/CSU T1/E1/J1 quad port Wan expansion card made for what appears to be an IP edge router.

Googling any names or numbers on it is always a good start.

Haha... like the cheat sheet rulers... My Casio FX82A stil has Xc=1/2pi Fc written inside the battery cover in case I couldn't remember it in the exam 30 years ago...

I love those IC insertion holders at the end, Wouldn't it be brilliant to have those in production for home projects or even for a better ic holder, production costs would kill it before it got off the ground. Fantastic idea though.

I wouldn't salvage things off of that board. I would use it as is. I wish I had one just like it! (the Alcatel Lucent board) Probably boot linux on it.

I love the Reflow Heater. I do this with a crepes hot plate from the supermarket. Works fine for me and I think this heater should do it's job too.

I've always said I have no artistic talent, but I've learned since that its more of a lack of artistic creativity. I had an art teacher that was amazed by my ability to draw out extremely detailed drawings without having a picture for reference, but I can stare at the paper for hours and not think of a single thing to draw. If someone just constantly told me what to do, I'd be a great artist, but great artists tend to be creative as well, so I don't expect to ever really be much of an artist.

Hey Hey EEV :) am Polish living in UK and still i got the nose to sniff some good Electronic Videos :) Keep on doing it mate You just one of the Kind :)

I have that exact alarm clock! The sound quality sucks, and the rotary switch is dodgy.... But I LOVE the start-low and ramp up alarm, and the per-day alarm schedule!

I have the American Innovations alarm clock, cost $60 new in 2009 and it still works today. The only thing I dislike about it is that goddamned wheelyknob on top that you have to crank like an old model T car to set the time.

Trezor teardown, very interesting! When suddenly some enveloppe shows up and Dave does not want to open the Trezor any longer. DO NOT SEND STUFF TO EEVBLOG MAILBAG THAT IS NOT INTENDED TO BE TEARED OPEN. Tjeezzz

you say no one likes your voice but i do i could listen to you all day

At 41:22 - About the light green bodge board. This appears to be taking the place of a fourth language ROM slot. I think this because the keyboard has L1, L2, L3 and L4 (four languages?) but there are only three language ROM connectors seen.

Dave, the Tireflys work on centrifugal force. They have a weighted spring in them thtat contacts a plate when it moves, either from shock or centrifugal force. arnd as Grayfox below said, these are valve caps for tires.

That is a BaseBand Unit for processing RF from/to cell towers.

Ingrid, you ain't alone, I am also here for entertainment.

Your voice, it grows on people.. at first it was a bit annoying, now it's beautiful, soothing +++ It's like growing into a new taste in music :) Keep it up !

Thanks to you, I repaired a broken TFT screen by replacing some caps.

"You couldn't sell this on ebay, probably even if it worked" ... eh I'd pay $200 - $400 for it "obsolete" ... its still good for things... I'm sure some tech enthusiast/hacker would love one of those to toss linux on and admire it while it does servery things or something. Maybe get those T1 cards working in linux somehow and run it as some pbx thing maybe?

Hi Dave, those lime green Fireflys can be screwed onto bicycle valve stems. As the wheels rotate, the movement activates the flashers. Enjoy your vids. Here in Houston Texas... Jim K

That basic connections book is very nice, although I still prefer something like a phone app, such as ElectroDroid which gives you categorized lists of components and I think some let you search for what you're looking for, much easier/faster trying to find something.

Adafeuit or it's founder has detailed instructions for doing reflow soldering using a kitchen (electrical) skillet. This kickstarted box is basically the same technique in a cruder form factor but with automation.

Although I don't recognize the Alcatel/Lucent board exactly, I have worked for a project for them at 1997-1999 and that kind of boards look familiar. If it is a board from that project (or similar) it was (is) used for (fixed) phone telecom centers/operating centrales (not sure if the translation is correct), thus as expected not for end consumers. Lucent delivered many to Japan. Most devices like these served as multiplexers and other processing for telephone lines. I don't know how many have been made, but similar boards like these, I have seen (and worked with) in Neuremburg, Germany. There was a room with thousands of these boards connected together in 'walls' like 5 meters, 3-5 rows high full of such devices. In the development room in Netherlands we had hundreds of these kind of boards. Btw, I'm a software engineer, so forgive my lack of knowledge or not checking details about the boards I worked with.

Is anyone here an aficionado? Is anyone here playing along at home?

Judging by E1/T1 ports this Alcatel Lucent thing is a cellular RBS site router. And yeah, it basically puts oldschool GSM E1/T1 traffic through GE. Propably it can also support 3G and LTE traffic.

The note and painting from Ingrid is awesome. Looks like you have the touch my friend.

This is the 60th year NuK's been in business, and there is a website where you can order custom soothers. He probably got that one direct since NuK is based in Germany. The fibrous insulation in the ReflowR (Product of South Africa) is Roxul.

Interesting the ROM configuration on that translator. I have found amongst my spare parts an EEPROM that was in a similar holder, but it was not for any translators.

I'm way behind on your channel. Need to go back and watch episodes I missed. congrats on passing 1000 episodes.

Those safety flashers appear to be something you screw onto the air valve on your tire. They flash when the car is rolling.

According to the patent (US6467939) for those bike flashers, you're supposed to screw them onto the valve stem on your tires and the rotational motion of the wheels should make them light up. That is a pretty neat concept, but makes me wonder how they implented the blinkenlight circuit in such a small device. As far as I can tell from the diagrams, most of the device is just occupied by a spring and small weight which acts as the switch when it spins. All the patent says is it uses an IC on a PCB, yet it goes into great detail about how the springy contacts turn it on. I'm guessing some sort of astable oscillator combined with a single shot to limit how long it's turned on for, but I dunno how they'd fit caps sufficiently large to produce an RC time constant long enough to keep it on that long or give it that low of a blinking frequency. Guess I need to read up on tiny blinkenlights solutions now cuz this has piqued my curiosity.

Now, now, now...Detroit has been making a major comeback...Matter of fact was just there the other day for lunch and amazing. The "D" has come a long way...it has a LONG way to go, but at least they are making the comeback!

Love how he almost cuts himself with the razor blade knife but never comes close with the Bowie.

Greetings from Cleveland, Ohio!

22:00 You put them on the valve caps or as valve caps on the wheels. The spinning keeps them on so you get nice big circle of lights.

Oh. and it's worth noting that RAM is ECC registered DDR2. You need an Intel Xeon or Core2 processor on the LGA-771 OR BGA/PGA-478B platform to be able to take advantage of the error correction. Pentiums will boot on this RAM but the ECC module will be disabled on the RAM.

Those green flashing tingny are maid to stick in your ears while biking at night 😁.

29:03 looks like the refractory lining in my 2000 deg F dental burnout furnace.

Love the plug in ROMs. Pity it didn't catch on for the 8 and 16 bit computing world.

The engine control unit in my 1988 Chevrolet S10 has its air/fuel tables burned into a UV EPROM in a very similar carrier/socket arrangement.

That blade server is most likely a trunk card for a main frame ip phone system. Such as 3 com makes a phone system server that has a blade server like that but its for trunking