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Motion sensored LED Schematic

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alexhofmans

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Hey, im trying to make a children's night light that when you rock it it turns on an LED light and stays on for a minute and then turns off. 8-O I have very little knowledge of electronics and circuitry but i was hoping someone could tell me how to do this or point me in the direction of a schematic of it?

any help would be greatly appreciated :grin:
 

hai here is the circuit diagram you can use any npn ransistors for example C945, C828, C1383, D1383
https://obrazki.elektroda.pl/4560758300_1367466185.png

R1,R4 68K,,,,,,,, R2,R3 use to set timing of led's flash or cange the value of capacitor...
usually capacitors can be used of 10uf and R2,R3 also 10K...
 

The simple multivibrator circuit posted simply flashes the LED on and off over and over. You do not want that.
 

The simplest solution is probably a tilt switch wired to the clock input of a 'D' flip flop. Connect the /Q output to the D input and the LED to the Q output. Use a transistor driver if more LED current is needed. It's a very simple and low cost solution and if battery powered it will draw almost nothing when the LED is turned off.

Brian.
 

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