Exactly - the main requirements are this:Well, the circuit I posted doesn't compensate for battery voltage droop either, but molecool would like it if it did.
- The circuit should only run the motor if the battery polarity is negative to input A and positive to input B. If inverse the motor should not run (basically as if I put a diode in series but without the forward voltage loss).
- There should be as little forward voltage drop as possible - preferably less than -0.05V.
- The AAA's initial 1.5V should be maintained as long as possible, which is why I thought the integrated joule thief was such a cool idea (if it could work).
- Finally, the components should be pretty cheap and commonly available.
Hey, nothing like a good challenge! ;-)