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MOBY is my first solar roller and uses a 1381 Solar Engine. It uses a 1381 J , 2N3904, 2N3906, 2.2 K resistor and 0.33 F capacitor. The 1381 J triggers when the voltage across the capacitor is 2.97 volts.
cool solar roller, im trying to make a symet with a FLED solar engine! nice job too!
You might want to check out some of Solarbotics kits, I think they have several like this. Here's one such kit, for example.
How do you make this I will like to make one. I do have a sizable PVC laying around. Thnx.