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It's weird that primarily 50% of the time the purple test point is the only color to have this issue, why purple? Part> https://www.mouser.com/datasheet/2/215/Keystone_Electronics_04082019_5190TR-5199TR-1551357.pdf

My friend has a broken blue snowball microphone and its powers by a mini USB cable plugged into a computer, the mini USB connector somehow broke off the board and has been rattling around its casing, I opened it up and found where its supposed to be connected, is this saveable? could I just...

I have a 3 tier reptile tank, but apparently there are not other things to heat them other than lamps an mats. Needless to say I need to know if there is a way to build a circuit (or buy) one that can also regulate the temperature output with an accuracy of 1+/- degree. I basically am going to...