Need A Bit Of Transistor Help...
March 11, 2010
Okay... I'm going to try to explain this the best I can...
I'm working on bypassing some switches in an RC remote, SPST switches I'm told. (See this thread for info about the switch http://letsmakerobots.com/node/17951)
I've got two wires soldered to the switch, and when I touch them together, the RC car goes forward as planned.
Now, what I want to do is use a transistor (I have both NPN and PNP) to automate the "touching of the wires" via my Arduino.
Problem is... If I use an NPN I know how to send a positive signal down the base (set pin to HIGH) but the negative leads don't get a negative charge from the switch... at least I don't think so.
If I use a PNP, which I think I should be, I don't know how to send a negative signal down through the pin, if that's even possible.
I hope I've made this understandable enough.
If you know anything that could help me... I'd greatly appreciate it.