Never change their value or replace them with a single one. Capacitors C1, C2 and C3 are meant for isolation.
R7 is the pull-down resistor for the gate of the TRIAC. Pin2 is connected to the mains voltage using a 1.5K resistor and pin 1 is connected to the cathode of the rectifier diode using a 620K resistor. Pin 1 and 2 of the system frequency input pin and input frequency input pin respectively. Diode D3 is used for rectification while Zener diode ZD does the job of rectification. Resistors R1 and R3 limit the inrush current. Thus by each touch, the firing angle of SCR is varied which in turn varies the brightness of the lamp.Ĭomponents R1, R3, D3, ZD, and C4 form the power supply section. The width of this firing pulse depends on the n0: of touches on the plate. At zero crossing the IC fires a pulse to trigger the Triac. Line frequency is taken through R4 to pin 2 of IC. On the third touch, the bulb is driven fully. At the second touch, the bulb gives medium light.
When you touch the plate, the lamp glows dimly. By touching this touch dimmer you can increase the light intensity of incandescent lamps in three steps.Īt first, when mains is ‘on,’ the lamp is ‘off’. TT 6061 is specifically designed for this purpose. This is a simple touch dimmer circuit made of IC TT6061. But if you want to make it more interesting by adding a touch feature check out our project. If you have a wall-mounted lamp one easiest way to control its brightness is to use a regulator switch (the ones we use for fans). But the same can be achieved without emptying your wallet if you have the know-how of basic electronics. Having such a built-in feature is available for some expensive lamps. They don’t have any regulators to increase or decrease the intensity of lighting. This is an interesting project where the intensity of a lamp can be controlled by touch.
0 kommentar(er)
