3pcs DIY IR Infrared Sensor Switch KitsInfrared Proximity Switch Circuit Board Electronic Training Kits

Parameter Specifications 35 60 1mm length width thickness Operating voltage DC 12V Welding step 1 Solder 14 resistors 2 diodes 3 zener diodes Do not solder in the wrong place pay attention to the positive and negative electrodes when welding diodes and use the negative electrode for the white side It is recommended that the board be mounted tightly 2 Next when welding the HEF4093BP IC do not solder the wrong direction There is a U port on the IC which corresponds to the silk screen on the PCB Solder the transistor after welding the IC Then welding electrolytic capacitors 3 Then solder the adjustable resistor and three led lights to send infrared and black light to receive infrared 4 Welded relays and sockets and 301 2P terminals Circuit description 1 Power circuit input 12V power supply DS can prevent reverse polarity of power supply R7 is current limiting current C2 C4 filter 2 Infrared sensing circuit the oscillator is composed of UIC R10 R1I1 D6 and cs It outputs a pulse signal from pin 10 of U1 After being amplified by Q4 it drives the infrared emitting diode D2 to emit infrared signals to the space If this signal is not blocked by an obstacle the infrared receiver DI cannot receive the signal so the follow up circuit does not work When there is an obstacle in front of the D2 such as the hand shaking in front of the D2 the transmitted infrared signal is reflected back by the obstacle It will be received by DI The received sign