Yes, I made a mistake on the circuit I popped out of my head.
+---------+---+----------+---------+ | | | + + | 3V bat--- | | - - | 10K | ^ Vf 50 >| ___ | + Sch PNP |- -|___|-+ === | /| | GND | | | | | | +-------+----------+ .-. | | | | | | | | | | 47 | + | '-' | | | | | - | | | --- 3 Volt PV | V -> | | | - | | | | GND | | | | === | + GND | +------------------+
And don't ask me how to invert the PNP around in that program. I gave up trying..
I forgot in the last circuit about the emitter lifting .
Yes, JF, I made a mistake.. But In any case this will work with a
3 Volt PV.. and a 1N5817 type Schotty will work for this. How ever, since it's obvious that a single PV isn't going to do s*it to aid in charging or supplying power for a solar device like this, it's only assume that a multi-cell unit would be in use.
The original posting was to simply use a PR, (Photo Resistor) to switch. I am offering both here with one device.
Jamie