Let's Make Robots!

TIP122

Too high voltage drops across different TIP-based motor drivers?

So, I needed to drive a couple of mystery motors I've harvest from a "electric shaving kit". I had a big motor, extracted from the electric razor and a tiny motor extracted from the nose pliers.

My needs:

big motor -- drive it one way; small motor -- drive it both directions

Case 1: Handling the big motor