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1/4 w is more than ok since those are high value resistors, so the current will be smalltransistor is ok too and the switch is just for powering the amplifier board assembly, it can work just as well without it.this is my e- mail adress email@example.com
Variable Low Voltage Load Tester
mine work's pretty much ok, i guess it depends on switch
how to make led's pulse on ...View Instructable »
that switch has 1 or 2 common pins (depending if is 1 or two channels) and all the other pins are for selection the switch makes a connection between common and one of the other pins (it is better if you have a multimeeter and check using continuity mode) , you first need to understand how this switch works (you can search online for a diagram) and then connect the the red wire with crocodile clip on the common pin and next connect the other 3 wires (3.3v 5v and 12v) to any other pins on the same channel let me know if u need more help (i will also post some more pictures)
Simple LED Torch
Arduino "Blink To Talk" using Charlieplexing
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