Thanks. That answer was exactly what I was looking for. I should be building one either this weekend or next weekend.
ugh. I still don't know which transistor to use though. I have a BitChar-G. PNP or NPN? I read through this thread a couple of times, but I don't remember seeing that it uses the same one as yours. Which transistor did you use for your MicroSizers one? I'm pretty sure it would be the same as that one.