Zener Diode Tester - Part 1. The build.

[@markusallport1276]

I found this video by accident, but I also find it intriguing. I say this because on ALI Express I found a 0-30v Adjustable power supply kit, as well as the digital meter used in this video, and the 18650 battery supplies! I built mine around 2020 during Covid. To my surprise 4 years later, I find this video! The differences between the two are small. Yours is more compact, whereas mine is 1.5 larger than yours. They both work the same, less circuitry for me to mess with, and it also has both volt and current adjustments mounted on the outside of the case. Your mA adjust is calculated, mine is not so exact. But for the over all function and voltages involved, there isn't much to concern myself with. I 3D printed a custom case for mine. I love your projects! I believe I found your channel last year some time and have been periodically rummaging thru your videos looking for new projects to play around with. Thank you for the lessons and projects, it's a gift to many that someone with your knowledge is sharing what you have.

[@electronicsoldandnew]

My pleasure. Hope you continue to enjoy the channel

[@ljy17]

Great stuff. Just the kinda stuff I like to watch! The more component testers you build the better!!

[@electronicsoldandnew]

ljy17 : glad you like it. I’ve got a few more in mind.

[@ljy17]

Electronics Old and New by M Caldeira I look forward to these videos. If I could request, a lithium battery internal resistance meter or a constant current adjustable dummy load would be great.

[@standishgeezer]

Love it! A simple but effective piece of test equipment that doesn't cost a fortune. Thanks.....off to look at Part 2

[@electronicsoldandnew]

Have fun.

[@anandadesilva6558]

The best labeling job ever!

[@electronicsoldandnew]

😊

[@rickwise9910]

Excellent device, excellent video! It isn't clear in the schematic, but you mentioned in Part 2 that the input ground and output ground are the same in the booster module. If you got a module in which they were isolated, the meter wouldn't work.

[@mickblackmore290]

Thank you, I built this It works just fantastic.

[@electronicsoldandnew]

👍

[@johnshidler5482]

Thank you very much for making this video, Your very thoughtful presentation was very watchable for me (Perhaps, my wife would not like it) and understandable !!! I am going to watch all your videos and I hope to see a lot more. John, NS5Z

[@mariusz17772]

Diody led też można testować. Można sprawdzić jakim napięciem zasilić taką diodę. Test zener diode Test led diode

[@whoisntwhoisit2126]

Lol. Love how the warning is completely obfuscated at the end. Awesome video thanks you very much! Will definitely be making one! Why bring the voltage down to 25v if its capable of more? Why not run it at max and be able to read a couple more values? I would think how quick and low current it is that should not hurt anything? Also anyone know of a booster that does 3.7-4.2 to ~100v? I cant seem to find even 60v+ without going to 10v input. Thanks!

[@vernonbosshard9317]

Need to build one for a microwave oven HV diode, it has a 3 volt fwd drop.

[@coltronex]

With a bit of modification perhaps silicon or Schottky diodes too,good project worth building IMHO,regards Colin.

[@electronicsoldandnew]

you're probably better off with the diode checker on a multimeter for those as the resolution is better, but it will work.

[@jaytee3472]

sir may i know the name of the booster module of up to 80vdc/125vc. i cannot find this module.

[@electronicsoldandnew]

It's listed in the description of part 2 video: kzbin.info/www/bejne/javVaImLjchojNk

[@donaldfilbert4832]

As you said: Brilliant !! ;)

[@electronicsoldandnew]

👍

[@BjornV78]

Nice and handy tester. Do you also have a video of the audio dummy load tester that you use for testing amplifiers ? I have searched in your video's but can't find it.

[@electronicsoldandnew]

I didn’t do a video at the time, I’m afraid.

[@goyetskalikot]

Can it be also used for LED strips for testing?

[@electronicsoldandnew]

Up to a number of leds in series that add up to about 30v, yes. For actual strips that have a number of leds in parallel, no. You need much more current for that.

[@MUHAMMADYAWARIFRAHEEM]

What ic use in voltmeter ?i want to build the voltmeter

[@electronicsoldandnew]

MUHAMMAD YAWAR IFRAHEEM : it’s a module as is explained in the video,. Not a discrete IC.

[@MUHAMMADYAWARIFRAHEEM]

@@electronicsoldandnew ok sir

[@alfredneumann4692]

Its interesting, what modules are available on the market. Awesome tester!

[@electronicsoldandnew]

Alfred Neumann : yes, in most cases it’s not worth building some modules as they are available at incredible low prices.

[@lelandclayton5462]

I am so building this for my bench. Much faster then trying to use a curve tracer / octopus on the scope.

[@electronicsoldandnew]

Yes it is and a curve tracer is quite a bit more expensive to get hold of.

[@harryshector]

You might want to be a little cautious about the means of connection, if you increase the test voltage supply. 100 volts might tingle.

[@electronicsoldandnew]

Gar Suitor : yep, I know. If I do increase the test range to those levels I’ll put in safer sockets and definitely not remove the caps.

[@harryshector]

Grayhill clips mated to banana jacks might work. The conductive surfaces are still exposed, but you don't have to touch them with power applied.

[@josfrankena4891]

Great project! Building one for myself. I made a much better schematic 😉 with real images of the used components. Want me to send it to you?

[@electronicsoldandnew]

I don’t actually need it, but it’s a good document to have 😊 I’ve been using this tool for some time now.