I need to spin a tiny dc motor using a tiny13.
I built what I think is an H-bridge suitable for
this by freeform wiring together 6 transistors.
I'm using an H-bridge since I will want to change
direction of this motor as well as it's speed.
Please look over this circuit (sorry for the crudity
of my drawing) and see if it looks OK to you.
The transistors are shown dead-bug style and
the top two are pn2907 and the bottom 4 are
I'm thinking this should work...but it does not :(
I wrote a small program that is setting pin 5 high
for a second..then pause .25 sec then pin 6 high
for a second then pause .25 and repeat. I know the pins
are changing correctly by using a simple LED probe.
But the output polarity of the bridge is not changing.
I'm thinking maybe a transistor is bad but I thought
I'd post this here before I build another one as it takes
a while to solder that tiny mess together :)