ok..i bought this 9v touch switch kit just today.. assembled it and saw how it worked... pretty fine.. i might just wanna connect it to my pc and use it as a power button i tried to connect the sensor itself to the power switch pins but it wouldn't on unless i use some wire to touch it or if i wet my finger b4 i touch it, i'm guessing theres too much resistance on my finger to activate it so i thought there must be some way on the circuit where it would have a sufficient amount of current and voltage going thru momentarily when i touch the sensor... any one have an idea where i can make a pc power button out of this circuit? R1 - 10k ohm R2 - 4.7m R3 - 47k R4=R7 - 33k R5=R8 - 5.6k R6 - 2.2k R9 - 56k R10 - 1k D1=D2=D3 - 1N4148 all transistors are general purpose npn transistors
This circuit relies on sufficiently low resistance in your finger to turn Q1 on. I assume the kit came with a small pcb with tracks etched on it to use as the "touch" sensor. It may need to be cleaned first. Also you can try "shorting out R1 to see if that will be enough to allow sufficient current to turn on Q1
