What is the principle of touch dimming circuit?

Touch dimming circuits usually use touch sensors to control the brightness of LEDs or other types of light bulbs. A touch sensor usually consists of two electrodes. When one of the electrodes is touched, the sensor will generate an electrical signal, which can be amplified by the circuit amplifier, and then the brightness of the light bulb can be adjusted by the control circuit.

In the dimming circuit of the touch lamp, the touch sensor works through the resistance of the human insulator. When a person touches the electrode on the lamp, the resistance will change, and an electrical signal will be sent to the amplifier, which will amplify the electrical signal and adjust the brightness of the bulb through the control circuit.

In the dimming circuit of touch lamp, the control circuit usually includes microcontroller and PWM dimmer. The microcontroller will monitor the electrical signal generated by the touch sensor and adjust the output of the PWM dimmer according to the magnitude of the electrical signal, thus adjusting the brightness of the light bulb.

The PWM dimmer converts the current of the power supply into a series of pulse signals, in which the pulse width and frequency are related to the electrical signal generated by the touch sensor. These pulse signals will be sent to the light bulb, and the light bulb will change according to the light and dark changes of these pulse signals, so as to realize the dimming effect.

The dimming circuit of touch lamp is simple and easy to operate, and it is one of the commonly used dimming control methods. In addition, other ways can be used to control the brightness of light bulbs, such as photoresistors and remote controllers.

The advantage of the dimming circuit of the touch lamp is that it is easy to operate, and the brightness of the light bulb can be adjusted by simple gestures. The touch lamp can also be used as a switch to further improve the convenience of operation.

In addition, the touch dimming circuit is also environmentally friendly. Because it can automatically adjust the brightness of the light bulb according to the brightness of the use environment, it can save energy and reduce carbon emissions.

Of course, touch dimming circuits also have disadvantages. If the touch sensor is often polluted or damaged, the touch light will not work normally. In addition, the price of touch lights is generally higher than that of ordinary lights.

Generally speaking, touch dimming circuit is an efficient, convenient and environmentally friendly lighting control method. Widely used in homes, offices, hotels and other places.