Hey guys, another question for you geniuses on the forum.
I'm making a small robot controlled by an attiny, driven by two 3v motors. (Their no-load current consumption is 0.2 - 0.4 amps) The whole thing is going to be mounted on a 2x AA battery pack, to supply power and hold everything together. I have the attiny controlling the motors with NPN transistors with an external 5v power supply for the attiny. I've even gotten the whole thing running (on a breadboard) with just the onboard 2.8 - 3v power supply, but there comes my problem. I have the attiny turning the motors on and off at intervals of 1 second. The motors won't start though, at least not by themselves. If I turn them a bit, they'll keep going until the attiny stops them, and then when the attiny tries to turn them on again I have to help. The batteries can turn the motors easily without circuitry, and it works if the attiny has a 5v power supply, so what's my problem? Is the 3v (3v is probably a bit optimistic) output from the attiny to the transistors to low to start the motors? Because I want this to be a small robot, I don't really want to add any more batteries. In series and they would overpower the motors anyway. Can anyone offer any help? Thanks. Geekyd00d.