3 Sets DIY Pyroelectric infrared Sensor Kits Anti-theft Circuit Electronic Technology Training Sets
$27.93
Shipping:Standard Shipping about 10-25 business days
Secure Payment:Paypal,VISA,MasterCard
Description
Size:82 x 44mm
Texture of material:Two-sided 1.6mm FR-4 board
Long life Low ESR
Function
Pyroelectric infrared sensor security circuit consists of pyroelectric infrared sensor PIR, integrated operational amplifier LM358, voltage comparator LM393, 110 alarm circuit and boot delay circuit, etc.. The circuit can be used as home security. When the family leaves the room, the switch K1 is closed, the circuit starts to work. As long as someone enters the room after a period of time, it will sound alarm.
1. The circuit is energized, the pyroelectric infrared signal of infrared sensor PIR to detect the front radiation of human body, from the signal PIR 2 feet output weak, after amplification transistor VT1, through the C2 input to the op amp IC2A 3 foot high gain low noise amplifier, and then by IC2A the inch1 footinch output signal.
2. IC2B in the circuit as a voltage comparator, its inch5inch pin voltage reference is provided by R10, VD1, IC2A when the inch1inch foot output signal to the IC2B inch6inch feet, inch5inch and inch6 footinch input voltage is compared, if at this time the inch6 footinch voltage ratio 5 feet high, 7 feet of IC2B from high level to low level. The C6 through the VD2 discharge, the IC3 2 feet into low level, if the voltage reference voltage of 2 feet inchthaninch 3 inchfeet of a resistance R14, partial pressure of R15 with low IC3, theinch 1 foot inchinto a high VT2 transistor conduction music chip IC4 theinch 2 foot inchvoltage, output audio signal after amplification transistor VT4, buzzer driver BELL issued 110 alarm sounds.
3. When people leave the detection area, IC2B’s inch7inch feet to high, VD2 cut-off, C6 has a charging time (30 seconds), making the buzzer delay alarm for 30 seconds.
4. VT3, R20 and C7. The time delay circuit, about 2 minutes (should be greater than the alarm delay time), to prevent the alarm immediately when starting up, let people have time to leave the scene, but also can prevent misoperation in power after the call.
Package included
3 x DIY pyroelectric infrared sensor kits
Weight | 0.081 kg |
---|
Customers Also Viewed
5pcs DD2712SA 3.5A Mini 5V-27V to 3.7V DC DC Step Down Buck Power Converter Module Voltage Regulator
$22.52Boost & Buck ModuleAdd to cartDescriptionInput voltage:5-27VOutput voltage:5V Maximum output current:2.5AShort time maximum output current:3.5A Quiescent current:about 250uAWorking frequency:900KHz.Working efficiency:77-92% Size:25 x 15 x 6.3 mmOvertemperature shutdown, Under-Voltage Lockout (UVLO), BS-voltage protection, and short circuit protection.Note1. Input voltage can not be greater than the maximum input range.2. Output power can not be greater than the maximum load for a long …
1080P 5MP 160 Fish Eye Surveillance Camera Module for Raspberry Pi with IR Night Vision
$34.43Raspberry Pi & Orange PiAdd to cartFeatures– This is the new version, can replace the infrared lamp or white fill light, the effect is great.– The Raspberry Pi Camera Board Features a 5 million pixels– And also supports 1080p @ 30 fps, 720p @ 60 fps and 640*480p 60/90 video recording.– OmniVision 5647 sensor in a fixed focus module.– The module …
1080P 5MP 160 Fish Eye Surveillance Camera Module for Raspberry Pi with IR Night VisionRead More
STM32H743VIT6 STM32H7 Development Board STM32 System Board M7 Core Board TFT interface with USB Cable
$58.95Motherboard & Development BoardAdd to cart>>>STM32H750VBT6 Manual:Click here to open>>>STM32H743VIT6 Manual:Click here to openhttp://myosuploads3.hobbyant.com/products/20200410/20200410051631STM32H750HAL-1909.rarhttp://myosuploads3.hobbyant.com/products/20200410/20200410020657STM32H743HAL-1909.rarSpecificationsFrequency:400M (M7 core)Package:LQFP100RAM:1024KBFlash:H750VB:128KB H743VI:2048KB (2M)OLED interface – plug and play, support 0.96 inch / 1.3 inch OLED TFT liquid crystal interfaceConnect 1.3 inch HD full color LCDConnect 2.0 inch HD full color LCD Data storage:W25Q64 (QSPI driver)High speed crystal:25MHZLow frequency crystal:32.768KPower + programmable LED lights2 users and …
2.5 inch 60mm LED Turbo Boost Gauge Vacuum Press Pressure Bar Dials Meter for Car Truck
$99.21Switch AccessoriesAdd to cartSpecifications Material:Aluminum+ABS+Acrylic Power:DC(10-15V) 12V Professional Reads Range:-1~2 BAR Light Colour:White + Red Diameter:2.5 Inch /60mm Packing Size:15 x 8 x 11cm Features 270 degree sweep. Illuminated red needle display. LED Backlight display between white and red light are switched by the button. When the pressure alarm, peak light becomes red, the pressure alarm point can …
2.5 inch 60mm LED Turbo Boost Gauge Vacuum Press Pressure Bar Dials Meter for Car TruckRead More
5pcs JDY-16 bluetooth 4.2 Module Low Power High Speed Data Transfer Mode BLE Module
$28.46Other Module BoardAdd to cartDescriptionJDY-16 Version supports(WeChat, APP, Android) Transparent, IO, RTC, PWM and other functions1.BLE high speed transparent transmission supports 8K Bytes rate communication2.Send and receive data without byte limit, support 115200 baud rate often send and receive data3.Support 3 modes of work4.Support(serial port, IO, APP) sleep wake up5.Support Wechat Airsync, Wechat applet and APP communication6.Support 4 channel …
5pcs JDY-16 bluetooth 4.2 Module Low Power High Speed Data Transfer Mode BLE ModuleRead More
Reviews
There are no reviews yet.