Please pardon my ignorance, I'm still trying to wrap my head around this problem. I have built a circuit that will allow me to control distribution of voltage from a single external power supply to one or more of four test units using the pins of an Arduino to control the switching. The circuit looks like this:
The power supply positive and negative are connected at J1 and J2 with the units being attached at J3-J10. S1 and S2 are used for interacting with the user and are not relevant this question. The Arduino is a MICRO that is being powered by a wall wart that provides 5V and 2A.
I find that when the circuit is sitting idle, none of the Arduino pins attached to the transistors are LOW (the LOW state at the transistor allows voltage to flow at the FET), but the power supply attached is on, I see a slowly building voltage at any of the output pairs (J3 and J4, etc.).
I did not see this when the circuit was in the breadboard and I've triple checked and resoldered many of my connections to be sure everything is hooked up correctly. I'm sure that I'm missing a very simple answer to my question, but it alludes me. Any help or clarification would be most helpful. Feel free to ask for any other information you might need.
