Solarbotics motor question
November 19, 2008
My robot is going to compete in a competition that will require it to compete in different competitions. For one competition, it has to be very efficient, and basically keep following a black line longer than everyone else. Another competition that it has to compete in is a tug of war. The rule is, it cannot change its hardware in between competitions. Naturally, for the endurance competition, you want to hook up a smaller voltage to the motor. But I was thinking of using the following circuit in order to give the motor more voltage for the tug of war competition:
It is actually a simplified circuit. There really is a microcontroller and h-bridge in there, but this schematic should give everyone an idea of what I'm trying to do. In endurance mode, the robot will run off of the 3.3V regulator. But for the tug of war, the relay will kick in and give the motor 9V. The diode will keep the 9V battery from shorting directly to the 3.3V regulator. We plan on using the 5V solarbotics motors.
And now, we finally get to my question. My question is...Has anyone ever ran those solarbotics motors at a voltage higher than 5V? And if so, how long did they last? I've done a similar scheme with huge motors for my solar boat. They were 24V motors, and they were able to withstand 36V across them. But I am unsure about the quality of the solarbotics motors. Thanks in advance for any info anyone can give me.