This musical light alarm circuit is very simple, uses only 7 components, a LDR and a 3.6 V battery or 3 x 1.2 volts rechargeable batteries. The well-known UM66 is used as the sound generator and will ...

Setting the threshold at which the circuit switches the output is adjusted by a variable trimpot acting as a voltage divider with the LDR.

Posted in car hacks Tagged Audi, car, headlight, headlights, ldr, light sensor, pic, PIC12F629, PIC12F675, sensor ← Animated Bluetooth Bike Turn Signals ...