Safe and beautiful passive plug-in circuit diagram

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

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The production uses a pyroelectric infrared sensor as the human sensor, and the infrared processing chip S-01 is the core of the control circuit, and the combination of the external components and the discharge socket constitutes a passive plug, thereby realizing that "someone is within the detection range of the sensor" The main electrode in the plug is energized, and vice versa; the jack window has a load when the plug is plugged in. After the plug is pulled out, the active copper piece in the touch jack of the finger has no power function, and is safe. It has the advantages of low power saving, low cost, beautiful appearance and practicality, and is suitable for audio and video and other electrical equipment used in the home.

First, the appearance of the device structure is as shown in Figure a. The outer casing is made of plastic material. The internal structure is shown in Figure b above. Among them, J-1 is the contact of relay J, and K2 is the state control switch. The pyroelectric human body infrared sensor model is LS-064, and the infrared processing chip model is S-01. On-chip amplifiers, voltage comparators, state control and delays are available. The following figure shows the controller circuit, in which R5~R8 are the gain network for determining the internal amplifier of IC2, R10 and C9 are delay networks, and the delay time is 2s.


Second, the working principle is connected to AC220V power supply, press K1, pass FU, step down by Cl, VD1~VD4 rectification, C2 filter, DW1 voltage regulation, get 12V DC voltage, on the one hand, supply relay J, on the other hand After ICl is regulated to about 5V DC voltage, the subsequent circuit is powered. When the pyroelectric infrared sensor PIR detects the infrared signal of the human body, it outputs a weak electrical signal to the IC2 (14) pin, which is amplified by the IC2 two-stage amplifier, the voltage comparator is compared with the set reference voltage, and the delay processor processes After that, the 2 pin outputs a high level, the drive VT1 is turned on, the relay J is energized, the contact J-1 is turned on, and the main electrode of the plug is energized. If there is no one before the probe melts at this time, the delay circuit ends after 2s delay, the relay J is released, its contact J-1 is disconnected, and the main electrode is de-energized. This circuit has a continuous trigger function. When the LED 2 is in a bright state, the pyroelectric infrared sensor detects the human body infrared signal. If the second trigger occurs again, the delay time starts again. If there is always someone within the detection range of the probe PIR, the control circuit continues to operate, the contact J-1 is closed, and the main electrode in the socket is energized. K2 is the status switch. When the K2 circuit is pressed, the sensor and control circuit do not work. In Figure 2, the LED is the power supply indication, LED2 is the status indication, VD5 is the freewheeling diode, and Rl is the bleeder resistor.

Third, debug the power supply and press Kl, the LED lights up, slowly adjust RP2 and RP1, observe whether LED2 is lit. If LED2 is lit and the relay is working, insert the plug into the plug-in window and the load will work. If LE02 is not lit, re-adjust RP1 and RP2. As long as the welding is correct, the adjustment is effective.
This socket is passive. During operation, the passive copper piece is pushed by the plug pin, and the contact and the main electrode contact are closed; when the plug is not inserted, the passive copper piece has no electricity, so please pay attention when testing.