Thanks for the replies - I just realized that I titled this "Normally Open" transistor when I meant normally closed. Sorry for the confusion. What I'm trying to do is essentially keep the Pump Controller shorted to ground in all cases except when the microcontroller signals the transistor. I've done similar things with relays before, but I was hoping to accomplish this with a much smaller transistor, if possible. Over the weekend, I got a a J112 JFET transistor, which seems to function as a normally-closed transistor (which is what I want). This seems to work when I use the following circuit. However, I've seen a couple references online to JFETs not being regularly used anymore. I was wondering what the drawback is to JFETs, as I haven't come across a clear answer so far.
