A beautiful and practical table lamp can be called a piece of art on a desk. Looking at the beautiful and beautiful table lamp on the desk may add some reading pleasure. So what is the working principle of the touch switch lamp?
Two-button touch dimming circuit board
working principle:
One or two button touch dimming circuit board, the working voltage of the touch chip is 2.4-5.5V. The input can also be powered by a 3.7V lithium battery, USB charging, and charging with overcharge and overdischarge protection. This touch circuit board is suitable for the production of small appliances such as touch-type lamps and touch-type LED makeup mirrors.
Second, there are 2 LED outputs, two touch buttons control two lights, touch ON/OFF and stepless dimming. Short press the touch switch function, long press the touch stepless dimming. The two buttons work independently and do not interfere with each other. Third, the power does not work, touch the button K1 to turn on the LED1, the initial brightness is 50% by default. When working, press the stepless dimming, one long press to increase the brightness, one long press to decrease the brightness, and short press the off. The touch button K2 function is the same as K1.
Touch switch circuit board
The main control chip adopts EC022W, the chip has stable function, strong anti-interference ability and high touch sensitivity, which can be adjusted according to the thickness of the touch medium. The touch media is suitable for a wide range of applications, such as acrylic, wood, glass, and metal. The thickness of the medium can reach 6mm.
Touch switch board reference circuit diagram: