Shake Light Circuit

209

03:13:07

Shake coil voltage source is fed into a bridge rectifier that charge a capacitor. The LED is controlled by a current source set which is set by the 40 ohm resistor (current through the 40 ohm resistor causes a voltage that turns on the lower NPN transistor which turns off the upper transistor. when the upper transistor turns off the lower also turns off which turns the upper back on keeping a constant current flowing through the LED. 

published 7 years ago

alexpu

7 years ago

This is great, the only thing I wonder is can a person really shake at 60 Hz? I would think 5-7 Hz is more realistic.

alexpu

7 years ago

The change appears to have minimal effect on the circuit.

kstarkey

6 years ago

Good point I'll change it on mine

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