Price: $6.99
(as of Jun 05,2023 06:56:43 UTC – Details)
💎【Infrared sensor switch, Infrared proximity switch】:Infrared sensor switch is to judge whether there is an object in front by detecting whether the emitted infrared signal is reflected, so as to control the switching action of the relay, which can be used in induction faucets, automatic hand dryers and other equipment.
🥇【The reference value of the sensing distance】: 15cm (the actual distance is related to the material of the reflector, you need to avoid sunlight and lights when using it, and then use it in a dark environment. In a dark environment, the large sensing distance can reach 30CM)
🥈【Delay time】: 0~40S adjustable (because the components have certain errors, the actual delay will be slightly different)
🎯【Circuit principle and introduction of key components】:J2 input 12V power supply, D5 can prevent the polarity of the power supply from being reversed, R7 is a current limiting resistor, and C2 and C4 are filtered.
🎯【1】：Infrared induction circuit: The oscillator is composed of U1C, R10, R11, D6, and C5. The pulse signal is output from pin 10 of U1. After being amplified by Q4, it drives the infrared transmitting tube D2 to emit infrared signals to the space. If the signal is not blocked by obstacles, the infrared receiving tube D1 cannot receive the signal, so the following circuit does not work;
🎯【2】：When there is an obstacle in front of D2, the transmitted red eve spacer is transmitted back by the obstacle, and it will be received by D1. The received signal is amplified by Q1 and Q2, and finally the amplified red eve spacer is input at the R3 end, and then Frequency selection is performed by U1A, and U1D is used for shaping and output at pin 11 of U1.
🎯【3】：Delay circuit: R5, VR1, C3 form a delay circuit. Adjusting VR1 can adjust the delay time after each action. The delay time of this circuit design is adjustable in the range of 0-40S. The time delay time will be slightly different.
🎯【4】：Switch control circuit: Q3, Q5, K1 consti
🥇【The reference value of the sensing distance】: 15cm (the actual distance is related to the material of the reflector, you need to avoid sunlight and lights when using it, and then use it in a dark environment. In a dark environment, the large sensing distance can reach 30CM)
🥈【Delay time】: 0~40S adjustable (because the components have certain errors, the actual delay will be slightly different)
🎯【Circuit principle and introduction of key components】:J2 input 12V power supply, D5 can prevent the polarity of the power supply from being reversed, R7 is a current limiting resistor, and C2 and C4 are filtered.
🎯【1】：Infrared induction circuit: The oscillator is composed of U1C, R10, R11, D6, and C5. The pulse signal is output from pin 10 of U1. After being amplified by Q4, it drives the infrared transmitting tube D2 to emit infrared signals to the space. If the signal is not blocked by obstacles, the infrared receiving tube D1 cannot receive the signal, so the following circuit does not work;
🎯【2】：When there is an obstacle in front of D2, the transmitted red eve spacer is transmitted back by the obstacle, and it will be received by D1. The received signal is amplified by Q1 and Q2, and finally the amplified red eve spacer is input at the R3 end, and then Frequency selection is performed by U1A, and U1D is used for shaping and output at pin 11 of U1.
🎯【3】：Delay circuit: R5, VR1, C3 form a delay circuit. Adjusting VR1 can adjust the delay time after each action. The delay time of this circuit design is adjustable in the range of 0-40S. The time delay time will be slightly different.
