Motion sensing LED Quantum Bits


Posted on Feb 6, 2014

The circuit works like this: Normally the LED is powered dimly through R1 and R3. SW1 is the spring and wire based accelerometer I mentioned earlier. When SW1 is closed, C2 quickly charges up (at a rate defined by R2) and is discharged through R3 and the LED. The battery normally has a high internal resistance, and C1 is used to counteract that wh


Motion sensing LED Quantum Bits
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en SW1 is closed. Change R3 to set the max current through the LED. Change R1 to set the normal "steady" brightness of the LED. Change C2 and R2 to vary the length of time the LED is bright. And make C1 large enough that it`s voltage doesn`t change too much when SW1 is closed briefly.




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