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I always triple check polarity.
Thats why incidents like these are very rare for me :P
PS. How could you not know which one is positivie?? On 100% they are color coded!
Codex4041365167d@Gregozor2121 I wouldnt know that, same reason that I will never be able to work with resistors unless somebody else labels it for me.
That is one of the few reasons Im not working with electronics. Im mentally capable of taking the necessary steps but everything is color coded and Im colorblind.
Sorry to heat that you are colorblind...
I dont use resistors color code, too much hassle. I just use multimeter to check their value.
I dont trust colors, i always check voltages with multimeter because sometimes i manage to switch colors by accident 😥. (Thats how i fried my sdr dongle... , I used 2 usb female ports and one of them had inverted leads...)
Well fucked a power bank in similar situation, made a led something one day and didn't finish, next day I looked at it and plugged it to a Chinese 4 lipo power bank....
Open the stuff... Used a copper wire as sprint and didn't isolate it, shot circuited everything.
Well... Got 4 new lipos for my collection. Lesson learned... Not just check but finish a project or scrap it in the same day.
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