Chandelier Dimmer
Many of the chandeliers have a pull chord switch. Now add a novelty to your chandelier and surprise the guests. Place a small wire down the lamps from this circuit and touch it once, they will come on dimly. Touch again they glow with medium brightness. Another touch drives them full. One more touch the [...]
Telephone Light
Telephone rings in the dead of the night and you grope in darkness for the light switch or may be for the cordless handset. Here is ingenious circuit which makes a light bulb glow whenever the telephone rings. This is a good application where mains are triggered by triac by the action of an opto-coupler. [...]
Light Sensitive Staircase Switch with Triac
Operation of the third circuit is much similar except that it has photo sensitivity. The circuit is shown in Schematic When there is no sufficient light/the reset pin is held low by R14 (4.7K resistor) and the circuit works as it is described in the earlier paragraph. But if there is sufficient light, resistance of [...]
