I need help on a circuit, it has to output +3 and -3 volts. I have a current regulates power supply that i adjusted to +3v. I realise I can get -3V by reversing the positive and negative leads.
This is what I am trying to accomplish:
I was hoping to use transistors instead of relays for this. So when pin 9 on the arduino is high, it outputs +3 and when pin 8 on the arduino is HIGH it outputs -3V. And when neither pin is high the power supply is not connected to the device.
I am not sure how to do this.