Anti-theft alarm circuit
Source: InternetPublisher:天天都吃好吃的 Keywords: anti-theft alarm circuit sensor mobile Updated: 2021/09/29
It is a simple anti-theft alarm circuit , and the sensor uses pyroelectric sensor IRA-E100SZI. When human body movement is detected , the piezoelectric
buzzer will sound the alarm. The signal received by the sensor is amplified by the AC amplifier, and then converted into a DC drive transistor VT1 through the rectifier circuit.
When VT2 is turned on. Piezoelectric buzzer alarm. The gain of the amplifier in the circuit near a few Hz needs to be about 70dB. When a single-stage amplifier is not enough,
a multi-stage amplifier can be used to ensure the necessary gain. When the input signal generated by human movement is very weak, an optical system is generally used to amplify it.
- Working Principle of CCFL and Analysis of Electronic Driving Circuit
- DIY a hat with a programmable LED display
- Blinking LED circuit diagram based on LDR and resistor
- LED Flasher circuit using 2 transistors for LED switching
- Laser detection and indicating device system circuit design
- Corridor automatic light-off device
- Mains undervoltage and overvoltage protection circuit 2
- Large light emitting diode display circuit
- WT8089 holiday lights ASIC
- Electronic rapid starter for fluorescent lamps
- Embedded-based robot system circuit module design
- Digital pressure measurement circuit
- Thermocouple Thermometer Circuit
- SHD201 single feed water pump water level automatic control soft start circuit a
- Sensor alarm circuit
- Anti-theft alarm circuit
- Temperature measurement circuit using silicon transistors as sensors
- Basic connection diagram of bridge sensor and XTR104 02
- Basic connection diagram for bridge sensor and XTR104
- Bridge sensor transmit/receive circuit
京公网安备 11010802033920号