Bus closed reminder circuit diagram
Bus closing reminder circuit The Schmitt circuit consisting of NE555 is matched with a gate switch and three sets of two-color LEDs. The circuit working power supply uses the l2V battery in the car. The Schmitt circuit consisting of NE555, the photoresistor RG and the transistor VT form a photo-controlled relay that automatically turns the control circuit on when it arrives at night. During the day, due to strong illumination, RG exhibits low resistance. At this time, VT is turned on, and the low level of the collector output clamps the input end of the Schmitt circuit to a low level, the circuit outputs a high level, and the relay is released. State, its normally open contact Kl is off. By running the grating ruler, the grating bars shield the light source, the light is transmitted between the grating bars and the bars, from which the number of pulses output by the receiver, a certain number of pulses are preset by the encoder, and when the number of output pulses reaches the preset value Just generate a control signal for the actuator to act. This method is generally used in CNC automatic control. Encipheror Optical Grating,No Burr Encoder Raster,Stainless Optical Grating SHAOXING HUALI ELECTRONICS CO., LTD. , https://www.cnsxhuali.com