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I'm thinking of making the $50 robot, and I was wondering about making a few changes
Also, with the DC motors, they need 6-12V, and (with no load) a current of 0.3 A. Their speed is 18,400 RPM and they have 69.2g.-cm torque (at 12V).
The MCU has an input voltage of 2-5V (step-up regulator makes it 5V) so will I need another power source for the motors?
If anyone could reccomend another similar MCU (based on ATmega168 chip, motor drivers/H-bridges, I/O ports for sonar.
it is about 10$ cheaper for a motor than for a servo