5V USB Adapter Repaired
Using this adapter with my Magnifier glass since very long time. I was inspecting one PCB for dry solder & found LED in magnifier glass was on & off in a short interval. Checked Magnifier with another adapter it works perfect.
Opened adapter for inspection.
Everything seems Ok with no physical damage, no dry solder.
At the time of opening the adapter one wire connected to plug pin was fell down. So I thought I found the culprit.
Replaced both the wires & put this circuit on power, but same problem.
Now checked all the parts on cold testing found one capacitor suspected which show no reading on cold check. (Not charging, Discharging).
I checked circuit on the power without capacitor, LED on Magnifier is light up, but flickering. So I replaced the capacitor from my salvaged parts box.
After replacing the capacitor, I connected circuit on power with magnifier attached to it.
Checked for few minutes & packed the Adapter.
Now it is working fine.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on Aroma Diffuser Heater Repaired
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Waleed Rishmawi
October 19, 2024 at 5:17 pm
Good job. Have a blessed day
YogeshPanchal
October 20, 2024 at 10:01 pm
Thank you! waleed
Albert van Bemmelen
October 19, 2024 at 6:38 pm
Glad that you were able to find the small but very important culprit in your 5v-usb-adapter to fix it!
These small e-caps are in a way like small memory cells that kind of memorize any applied dc voltage level for a period of time.
That is in fact also the way how I used it in my old article: https://jestineyong.com/diy-fully-automated-light-controlled-fan-regulator/.
Without this tiny e-cap also that entire Fan controller adapter project wouldn't have worked at all!
YogeshPanchal
October 20, 2024 at 10:11 pm
Thanks!Albert,
Automated Light control is very precise work project by you.i was bit confused that time because in schematic none of capacitors shows Polarity.
Parasuraman S
October 19, 2024 at 9:59 pm
Very good job there, dear Yogesh bai! Well done!
YogeshPanchal
October 20, 2024 at 10:12 pm
Thank you! Sir
Mrk J
October 20, 2024 at 3:47 am
Yogesh well done.
YogeshPanchal
October 20, 2024 at 10:12 pm
Thanks! Mark
Imoudu.O
October 21, 2024 at 4:13 am
Good job man!! i guess magnifier is not battery power too.
YogeshPanchal
October 21, 2024 at 3:19 pm
Imoudu.O,
Thanks!
Yes,it was supported Battery but i modified it.