TRex Jr Motor Driver and FA 130 motors
March 2, 2010
I just got these products and I am trying to build an RC controlled robot. I have the TRex Jr controller and the Tamiya dual gear box with FA 130 motors. I hooked the TRex up to my reciever and configured it. I did a test with the LEDs and everything seemed to be working fine and I was getting a 5 V signal out of both motor outputs. When I hook up the FA 130 motors (with .1 uF capactiors across the leads) the drive LEDs flicker and the motors make a high pitched noise and do not turn. When I hook the motors directly up to a power source they turn normally. I realize the FA 130 motors are designed for 3 V operation but I was under the impression they would work fine with a 5V input and just have a shorter lifetime.
I am clueless as to why my motors aren't working. I know these motors have high current draw but the TRex Jr is supposed to be able to supply 2.5A to each motor which is above stall current for these motors. Does anyone have any suggestions?