How to connect the touch switch? Touch switch installation drawing

? Due to the modern society, family decoration is becoming more and more exquisite, and many switches used in families have become touch switches. And it is not difficult to find that touch switches can be widely used in more and more public places. It is true that touch switches are more convenient to use and more beautiful in appearance than traditional switches. As we all know, the internal installation and wiring of touch switches are very complicated. It is no exaggeration to say that the wiring of touch switch is a great project. Let's take a look at the introduction of switch installation experts. ?

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First, how to connect the touch switch

There is a power supply in and a power supply out of the touch switch, just don't make a mistake, and the others are the same as ordinary lamp wiring. One is connected to the live wire, the other is connected to the light bulb, and the other end of the light bulb is connected to zero. There is no difference between the live wire and the neutral wire of alternating current, as long as the two wires are in contact, any hole will do. It is best not to operate with electricity. If the operation is not live, be sure to keep the screwdriver and other tools insulated, and be careful not to touch another wire when operating.

Second, the touch switch wiring diagram

The rectifier bridge composed of four diodes and unidirectional thyristor VS constitutes the main circuit of the switch, and the control circuit of the switch is mainly composed of integrated circuit M668. The 220V pulsating DC output by the rectifier bridge is current-limited by R 1, stabilized by VD5, and filtered by C 1, and then output about 6V DC, which is sent to the 8-pin and 1 pin of the IC for power supply respectively. The human touch signal is sent to the touch sensing input terminal SEN, that is, the two pins of the IC, and the trigger signal output terminal TR, that is, the seven pins of the IC, will output a series of trigger pulse signals, which will be added to the grid of VS through C3, so that VS turns on the light. Touch m again. Pin 7 stops outputting the trigger pulse signal, and the AC zero-crossing light goes out.

The IC of R4 and C2 triggers the external oscillation resistance and oscillation capacitance of the pulse oscillator. The synchronization signal of IC is divided by R2 and R3, and then input by 5 pins. Pin 4 of IC is a function selection terminal, which is now connected to VCC high level. The touch function is: touch M once and the light will be on; Touch it again and the light will go out. If pin 4 is connected to vss terminal low level, it will be a 4-speed dimming switch, and touching it once can change the brightness.

How to connect the touch switch? The above switch installation experts gave a detailed explanation. In fact, the installation of the touch switch is both difficult and simple. Here, Bian Xiao suggested that if you have a little knowledge of circuit electrician, or have a certain foundation in switch installation, you can install the touch switch yourself according to the above introduction. However, if you don't know anything about the installation of circuits and switches, you should go to the relevant stores to find a professional switch installation master, which can not only ensure safety, but also ensure the installation quality of switches.