How to make your own relay 

"...you can buy it for 2$ but it doesn't teach you anything..." this man speak truth

Very neat job. I like using parts salvaged from equipment and electronics that would otherwise go to landfill.

I built a similar one recently, however used 12 turns of 18AWG wire, as I wanted to have a current controlled switch. Old reed relay from a dead burglar alarm sensor was the donor for reed and former, and it now lives in the car, where it monitors the current flow to the trailer light relay block, so that I can easily see, using one LED if the lights on the trailer are functional, as it will operate if the 21W lamp bulbs are on, but not for the 5W side markers. Thus can see at least one brake light is connected, and the turn signals are working. Yes you buy the trailer module and wire it in, but this one was made entirely of old salvaged relays, and a salvaged industrial logic plug in unit, with wires from old ATX power supplies for the sense wires from existing car lights, and then more to provide the outputs. 4 relays, and 10 wires to connect, with a long one fed through the existing loom to the battery, where it is fused with a 15A fuse. Fault green salvaged LED wil lnot light, as it is fed fron the current sense relay and at the front of the car. Reed relays are current or magnetism driven, you can use a few turns of high current, or hundreds to thousands of turns of low current, though if you want to have it operate off say 5V at 1mA you will need a lot of copper wire, as you need ot get the right number of turns on, and keep resistance low enough to operate off 5V.

Is this man a treasure or what? Bloody hell! I could listen to him all day long and never get bored.

Tvoja schopnosť improvizovať ma neprestáva fascinovať, parádna robota!

"a czech man is single handedly reviving his country's manufacturing industry" haha, Very Nice video! I never would've thought of doing something like that funny thing is that yesterday our driers reed switch activated water drainage broke

So this was why that crazy finger cutter wire short video happened!

Might be ugly but it's still a nice experience in making your own parts. Before I started watching, I expected building a relay with a moving armature from the grounds up - but using a reed switch makes things a lot simpler. Nice video :)

Btw. your videos are what made me repair my vintage Tesla car radio and cassette player. I would not be confident to do it, but when I see your videos, it gives me confidence that even an absolute amateur without any formal training in electronics can do it. It was a success, I replaced the C319 condenser by botching in two other condensers in parallel, fixing the problem. They were of same age, type and together gave the correct capacity. I used logical reasoning to determine where in the circuit the issue most likely is and limited my search to a couple of condensers as they were the main suspects. I was lucky to be able to use the other channel as reference when working, because with these vintage components, measured values tend to drift.

I also come from the old school of fix it before replace it. Example is my neighbor came by to see what I was up to working in my garage and he was amazed I had my small trucks alternator torn apart on the bench and was replacing the bearings and brush assembly along with new internal voltage regulator. The old unit was constantly fluctuating from 12.8 to 14.8 v and causing all the lights to pulse up and down. I told him all the parts were only 20% the cost of a new unit and takes about a hour to do the entire job. Saved $160.00, I call that a win...

you just might be the only survivor in the zombie apocalypse

re: you're really reliable for useful and fun videos. thanks! (for real!)

With the loss of local electronics stores, I've been making my own components and salvaging others wherever possible. It does help that I'm also a hoarder and typically have the parts I need with enough looking :D

Last line was gold!😂

Thank you for every video that you make.

Great repair, clever way of using the sandpaper to remove the teeth of the gear wheel.

Awesome, good work.

Great idea. Great topic.

Well done!

I love your videos. Great channel! Thank you ☺

Nice work.

Just recently I was doing the opposite - salvaging reed switch from an old reed relay to be used in fridge door beeper

Niiiiiiccccce of you to relay this information to us, reedly useful.👍😏

Ingenious.

About two weeks ago i also broke a thin wire while repairing a high voltage transformer from an insulator tester, and it was on the 1000v side, i repaired just like you did and it worked just fine. Next time try to fix your "wire donator unwinder" to something, it makes the things easier, i duct tape mine to a speaker lol 😂 it worked out.

Sir i like you work very much. And like you english also. You are my teacher.

Čistě profesionální práce

Necessity is the mother of invention.

Have you seen any of my passive crossovers for "hifi" speakers? I also wound the coils and sometimes I had to solder two pieces of wire, because I did not have one that would be long enough. Especially for beefy thick coils for the woofer driver circuit. Of course I do not use any circuit boards and just botch all components to the rear wall of the speaker cabinet, connect all the wires "in the air", so it resembles a "birds nest". On first, second and third look, it looks just like a tangled mess of wires sticking out of seemingly randomly fixed components inside the back of the cabinet. I fix them using hot glue as well as plastic zip ties connected to metal bars that are fixed by screws. I place the coils always 90° offset if possible, to avoid any interference and make sure that there is no iron nearby that would affect them, unless it is an iron core coil (I cut up and old washing machine motor to get two iron cores and wound wire from old transformers to make the coils. They had the correct impedance and DC resistance was even better than I expected (by 0,2 Ohms). I could not care less about how the whole crossover looks, as long as it works and is hidden inside the cabinet. I am pretty confident it will keep on working for decades to come, or unless the electrolytic condensers dry out. Due to cost reasons I could not use only film condensers, as their price rises quickly to unacceptable levels as their capacity increases. And they tend to get physically large too.

I an also salvaging and keeping parts - so i am glad to have at least 250 relay in stock 😇

Thanks

Nice bro

the idea of using a tube from a pen is great. Man, you sound like a pope reading a psalm in a church.

Awesome !

Have you ever rewound field coils for an ac motor? I'd love to know more about how the slots with each groups of coils get wired up

oh, doggo! we missed 🤗

2:57 very true!

we need the cat

When i saw the short for this, I know it's gonna be a new video

Oldukça yaratıcı. Peki reed anahtar için manyetik alanın doğrultusu doğru mu? Yoksa dikine olsa daha mı iyi olur? Reed röleler genelde ne kadar akım taşıyabilir?

A DOG ? !! You upgraded the cat? If I ever end-up on a deserted island with some left-overs of an airplane with a broken radio, I want to be there with you ! and.... Angelina Jolie... maybe

Danke!

3:32.. It would be really cool to see you use a white stripe on the drill bit chuck to have a sensor on some sort of like Arduino board calculating the amount of turns for you as the drill Chuck spins. Just have the white stripe pass a tachometer type sensor and count the revolutions it makes for you on a computer screen or something.

Could you make a video about winding transformers?

The CatCulator suite of software needs to be a phone app.

😸😸😸

Question: what is the moving part in this relay? thanks for the video.

👍

Your winding me up 😂

Can you please show us where did you use this relay!? In your multimeter !? Thanks

❤

How much current this relay can support ?

2:50 "Insulation to small. Dodgy!!!"

Hight current contactors are expensive. You can do it yourselt fraction of a cost!

Ty jsi z Česka?

@2:57 Here is the dog.

Actually, I think it's beautiful. MacGyverizm at its best.

I think your calculator needs a bit more resolution still :D

The dog, definitely dodgy....

Aah, im a hoarder like you myself😂

need to build a turns counter.

the moral of this story is. You should always have duct tape for any situation.

I want proof the dog didn't eat the cat! He looks very guilty.

Show

Make high current toggle one without reed switch 😆

I always start over when the wire breaks. [Yeah right]

Why is he singing?

Super dodgy!

not that useful.... 🤤

Great work, never buy what you can make yourself 👍

Sir i like you work very much. And like you english also. You are my teacher.