blastfromthepast

Forum discussion tagged with blastfromthepast.
  1. M

    How do I make 12v (car battery) into 4.5v

    I bought a Digital Car Compass with Time. It uses 3 AAA batteries as normal power source but I want to use the car battery to power it so I dont need to change the batteries. How would I make the circuit. What would I need from radio shack to make this work without setting my car on fire or...