Wow, at that price you could afford new motors and a bigger battery.
Yes but it would work and let me get on with this.
POOP - it's on backorder at robotshop canada.
Maybe a better idea is to get the adafruit shield which specs 4.5V and just stick a resistor or power diode in to drop a volt. At least then I can use the shield for a future project with the more traditional motors.
You will need to make something custom for such low voltages.
Actually, no: the 4.5V minimum is for the Vcc supplies. After allowing for the drop across the Darlingtons, a 754410 or LM293 should output about 2-3V less than Vcc (depending on current draw). So a 5-6V supply should be about right for a 3V motor.
However, there’s a good chance that a 3V motor will draw more current than those 16-pin chips can safely supply: I’ve seen complaints about this from people who tried to use motor shields to control 3V toy vehicle motors. Especially when they didn’t add heatsinks.
oopsie, the little pololu driver board worked a treat but the poor little car can't move under the weight of the 2 AAs for the motor, a 9V for the arduino, the arduino and the shield. I'll try adding a battery I guess or some fresh alkaline AAs. So far I'm happy that it LOOKS the part anyway!