Build Your Own Arcade Controls Forum

Main => Main Forum => Topic started by: Timoe on February 24, 2007, 07:05:52 pm

Title: Wiring Switches to a PCB that is expecting potentiometers?
Post by: Timoe on February 24, 2007, 07:05:52 pm

I am hacking a Logitech Wheel.  I'd like to hook up the analog R3 & L3 shifter paddles to regular switches on a Happ up/down shifter.

I have seen the attached diagram but I cant make heads or tales of it.  Can you help me to understand?  Do I really attach a 5k and 50k resistor to both the NC and NO contacts on the cherry microswitch?

Title: Re: Wiring Switches to a PCB that is expecting potentiometers?
Post by: BobA on February 24, 2007, 07:34:32 pm

If you trace the circuit and see that when you close the switch you change the side of the Input that the majority of the resistance is on.  When you open the switch the resistance swings over to the other side of the Input.  You are making an analog input into basically a 2 postion device.  I think that is the purpose of this circuit and what you want to accomplish. Closing the switch puts the pot to one end and opening the switch puts the  pot over to the other end.