Ok I know this isn't arduino related but I thought I might be able to get some help here.
I constructed this four transistor H-bridge on a breadboard.
I used two pnp and two npn transistors. Also four 1K-ohm resistors
I'm certain it is properly built, because I have two leds (in both directions) in place of the motor terminals.
When one input is set high (opposite set low) one led lights up and when the other input is set high (opposite set low), the other led lights up instead. This tells me it is functioning properly.
However, when I replace the testing leds with a motor it doesn't work!! Why is this??
The motor I am using is a standard worm drive motor. I also tried it with a few of my other model airplane motors and nothing works!
What's wrong here??