The working principle of the circuit: when the 12 V battery is fully charged, its terminal voltage rises to 13.5 V, at this time, the triode VT is turned on, the relay is pulled in, and the K-1 is turned off, thereby cutting off the power of the charger, and the charger stops working. Motion Control Sensor is an original part that converts the change of non-electricity (such as speed, pressure) into electric quantity. According to the converted non-electricity, it can be divided into pressure sensor, speed sensor, temperature sensor, etc. It is a measurement, control instrument and Parts and accessories of equipment. Incremental Rotary Encoder,Incremental Optical Encoder,Incremental Shaft Encoder,Absolute And Incremental Encoder Changchun Guangxing Sensing Technology Co.LTD , https://www.gx-encoder.com