FLED-based solar engines
The original FLED-based SE uses a flashing LED to drive a type 1 solar engine (you`ll note that it`s just like the Zener-based SE, but with a FLED in the star...
The dual slope-sampling solar engine
The dual slope-sampling solar engine. Yet another interesting design from the fertile mind of Wilf Rigter If you had time to experiment with the ALF type SE cir...
The 1381-based solar engine
The 1381 solar engine uses a 1381* voltage detector (a.k.a., a voltage supervisor) IC to drive a voltage-based (type 1) solar engine. The 1381 is normally u...