Build this Variable Constant Current Supply. LED light tester, Christmas lights and much more

Подписаться 159 тыс.

Просмотров 11 тыс.

50% 1

This Variable Constant Current Source has a multitude of uses and is cheap and easy to builf.
I work in collaboration with:
The Electronics Channel (with Carlos and Detlef)
/ @theelectronicschannel
Gran Canaria Uncovered
/ @grancanariauncovered (with Detlef and Julie. Not electronics related)
Det Builds Stuff - / @detbuildsstuff (Detlef)
Retro Upgrade - / @retroupgrade (Carlos)
For All Your PCB needs: free $5 discount coupon
www.pcbway.com...
Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission.
TEST METERS
ANENG AN8009 MULITIMETER
s.click.aliexp...
amzn.to/4da4Q7h
amzn.to/4fsjkkm
amzn.to/3yuf03q
amzn.to/4fwQOOD
www.banggood.c...
KAIWEETS HT118E MULTIMETER
s.click.aliexp...
amzn.to/3yC0ZRe
amzn.to/3SHIEcy
www.banggood.c...
VC480C+ MILLIOHM METER
s.click.aliexp...
amzn.to/46Gg1Cm
amzn.to/3YwUjyn
MESR-100 ESR METER
amzn.to/3yxQ0Zd
amzn.to/3WSr73A
s.click.aliexp...
XC6013L CAPACITOR METER
s.click.aliexp...
amzn.to/4cf2lzm
amzn.to/4dw9cp5
TM-902C TEMPERATURE METER
s.click.aliexp...
amzn.to/4fAz44L
amzn.to/4fBxD69
LCR-T4 COMPONENT ANALYZER
s.click.aliexp...
www.banggood.c...
amzn.to/3X4rOHv
amzn.to/3Agcj6h
FNB58 USB ANALYZER
s.click.aliexp...
amzn.to/3MgBFnn
amzn.to/4dyLU1H
www.banggood.c...
PCI POST ANALYZER
s.click.aliexp...
amzn.to/4dd8ihw
amzn.to/3LTpeO7
TL460S PLUS PCI_E ANALYZER
s.click.aliexp...
amzn.to/3WEsdi6
TOOLTOP ET120MC2 SCOPE
s.click.aliexp...
amzn.to/4dCaz5L
amzn.to/4dxOYLt
FNIRSI 1014D SCOPE
s.click.aliexp...
amzn.to/3AdZqK1
www.banggood.c...
NPS3010W 30V 10A PSU
s.click.aliexp...
amzn.to/4dzl2yM
T12 STATION WITH M8 9501 HANDLE
s.click.aliexp...
amzn.to/46E73W6
M8 9501 HANDLE
s.click.aliexp...
YIHUA 982 Soldering Station C210/C245
s.click.aliexp...
FNIRSI HS-02 PORTABLE SOLDERING C210/C245
s.click.aliexp...
amzn.to/3Yv7Ma5
QUICK 861DW
s.click.aliexp...
amzn.to/3WDF4B5
amzn.to/4ci7rdW
PROS'KIT SS-331H
s.click.aliexp...
INFIRAY P2 PRO IR CAMERA + MACRO LENS
s.click.aliexp...
www.banggood.c...
amzn.to/4coSRle
amzn.to/4coSV4s
TOOLTOP ET13S THERMAL CAMERA METER
s.click.aliexp...
ET13S MACRO LENS
s.click.aliexp...
OPTICAL MICROSCOPE
s.click.aliexp...
usa.banggood.c...
amzn.to/4dzBA9G
TOMLOV TM4K AF FLEX
amzn.to/3LY0YKs
tomlov.com/pro...
TL866 II+ PROGRAMMER
s.click.aliexp...
amzn.to/3SGKL05
CH341 PROGRAMMER
s.click.aliexp...
NC-559-ASM FLUX
s.click.aliexp...
DESOLDER BRAID (I use size 8045)
s.click.aliexp...
s.click.aliexp...
HX-T100 SOLDER (0.6MM)
s.click.aliexp...
ESD-11 TWEEZERS
s.click.aliexp...
Learn Electronics Repair is now on Discord! Come and join the fun, it's free.
/ discord
If you would like to support this channel
You can send donations
www.paypal.com...
You can subscribe to Patreon
/ learnelectronicsrepair
Or you can click Join to become a channel member
Thank you
Richard

Опубликовано:

29 сен 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 26

@mikepanchaud1 10 месяцев назад

That's great. If you don't have spare probes you can use old plastic pen barrels with some 'hot snot' to fix the wires in. It could also be used as an led tester.

@willthecat3861 10 месяцев назад

I've done that and it works; but, I could never bring myself to use them. (I like the manufactured probes... even the cheap ones.)

@Lightrunner. 10 месяцев назад

Nice Tool Richard and pointed sharp measurements 👍👍👍👍👍👍👍

@darrenwardell3079 8 месяцев назад

Absolutely brilliant video. Very well explained and i have learnt so much👍👍

@turnipofentropy4674 10 месяцев назад

Excellent. Great videos Rich. Many thanks.

@willthecat3861 10 месяцев назад

I doubt the needles will stay in those terminal blocks. (Spot weld to the regular metal probe tips?)

@LearnElectronicsRepair 10 месяцев назад

I agree after using this a little while - solder them on using some flux and leaded solder, they attach no problem. I then put the terminal blockes on over the soldered joints anyway for a bit of extra stability

@sigworth223 9 месяцев назад

I don't understand. Why is the reference voltage 1.25? How did he come up with that number?

@bobweiram6321 10 месяцев назад

So it's a variable diode tester?

@LearnElectronicsRepair 10 месяцев назад

Could be. Good for LEDs connected in serial such as Xmas lights, high wattage LEDs etc. Also could use it when fault finding to 'switch on' transistors, mosfets, enable chips etc etc. I'll bet it has more uses than that too 😉

@cuanhogan4330 9 месяцев назад

A needle fits great into a banana plug connector, in the centre of the "cross" on the connector.. fits snug with no soldering

@tonysheerness2427 10 месяцев назад

Sewing machine needles would fit better as they have a thicker shank. Another good practical next to nothing project.

@justmc62 10 месяцев назад

Fantastic tutorial Rich .. love these DIY devices .. As always I appreciate all that you share with us .. On a side note ... you mentioned in the past that you would prepare an Op-Amp tutorial .. hope that is still in the works ... 😎

@TheElectronicDilettante 10 месяцев назад

Awesome build!! As you were mentioning potential applications and voltages, how difficult will it be to add a “preset voltage “feature to the tool?

@sanjaydivekar 9 месяцев назад

Very good👍

@andrew_koala2974 9 месяцев назад

Fund the smallest connector block possible - and there are some quite tiny variants available - then remove the brass connector away from the plastic insulation.. After the sewing needle is fitted - put some heat shrink over the brass connector -- the result is a neater appearance. It is in such a method I replaced the thermal fuse in our Freezer. Thus it was not necessary to crimp the thermal fuse into the wiring that feeds the Freezer Defrost element -- This method also makes it very simple to replace the thermal fuse if required in the future. No stuffing around with crimps and a crimping tool = Just a very small brass insert and a very small screwdriver - and of course some heat-shrink tubing

@SkippiiKai 9 месяцев назад

Speaking of soldering onto probe leads I recently soldered small alligator/crocodile clamps straight onto a number of my test probes, set back a bit (1 or 2 cm) so you still have the pointy tip, but also can use them to clamp into anything. One of the mods I ever did to my multimeters (along with a little plug and charger circuit for the battery.)

@knightwar3 9 месяцев назад

So this "short tracer" can be used for testing leds without worrying about the current from the bench psu that's nice i need to build the second version too. Great content as always

@80SWoods 10 месяцев назад

I really like this. Unlike commercial probing devices, a sewing needle hole is basically self healing as it’s so narrow.

@GiC7 10 месяцев назад

Thanks, great project. Be blessed

@RetroUpgrade 10 месяцев назад

Told you it would solder 🤣😂, benefit being poor and a cheapskate 😋 you test things like this Btw i usually use Shewing machine needles instead they are usually sharp and more resistant to breaking and they have a flat side so you can solder even easier . de circuit its self is really useful :) now make one for LED TV lights 😝 300V+ should be interesting XDD

@kriswillems5661 10 месяцев назад

Another interesting circuit is the "2 transistor current source".

@t1d100 10 месяцев назад

👍👍👍

@andymouse 10 месяцев назад

If you only have access to a fixed supply on your repair bench this would be invaluable but if you have a variable supply you can set voltage and current with that and then the nice little hack to make pointy probes comes in handy as thats a nice idea, very quick and clean to make and Bingo !! job's a good 'un....cheers.

@LearnElectronicsRepair 10 месяцев назад

@andymouse A bench PSU won't do this. I have three of them but the main issues are that A: you can't set the current this low for things like testing LEDs and B: even if you can set the current low enough, the output capacitors on the bench PSU will discharge into the device under test and kill things like LEDs before the current limiter can even do anything to help

@andymouse 10 месяцев назад

Good point !! yeah a couple of mA not possible at least not with mine...cheers.@@LearnElectronicsRepair