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
PM3 Proxmark3 V5.0 IC+ID Full Encryption Card Reader All-in-one Access Control Elevator Garage NFC Multiple Card
$207.99Card ReaderAdd to cartFeatureIt is only used for learning RFID NFC communication and testing the technical security of RFID, as a basic learning tool for RFID personnel. Use for illegal purposes is prohibited.Increase the reading memory, you can read more cards, and the reading speed is faster and stronger.Support one-click reading, easy export and import filesSupport dual-frequency cards, …
10pcs DC3.3-4.2V JDY-64 Lossless Bluetooth 4.2 Module Stereo Audio bluetooth Board
$42.69Smart ModuleAdd to cartProduct introductionJDY-64 is a low power consumption lossless two-channel stereo design, and the overall performance is very advantageous. It only needs to connect the module to the application products so that users can quickly achieve wireless music transmission, which defaults no prompt tone for button, switch, connection, fragment opening, and integrated SD card defaults earphone …
10pcs DC3.3-4.2V JDY-64 Lossless Bluetooth 4.2 Module Stereo Audio bluetooth BoardRead More
LILYGO TTGO T-Bot ESP32 Main Chip T-Block with HC-SR04 Module Programmable Hardware MINI Trolley
$91.31Smart ModuleAdd to cartMore Information:https://github.com/Xinyuan-LilyGO/TTGO_TWatch_Library FeatureHardware SpecificationChipsetESPRESSIF-ESP32 (Wi-Fi & Bluetooth)240MHz Xtensa single-/dual-core 32-bit LX6 microprocessorFLASH16MB / PSRAM 8MBSRAM 520 kB SRAMButtonSwitch, ResetUSB to TTLCP2104Modular interfaceI2C On-board clock40MHz crystal oscillator Working voltage2.7V-3.6VWorking temperature range -40→ ~ +85→Size55*46*53 mmWeight48.3gPower SupplyPower Supply InputUSB 5V/1ACharging current500mABattery Input 3.7-4.2VBattery3.7V lithium batteryJST Connector2Pin 1.25mmUSBWi-FiStandardFCC/CE-RED/IC/TELEC/KCC/SRRC/NCC(esp32 chip)Protocol802.11 b/g/n(802.11n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4┢S Protection intervalFrequency …
UAF42 Active High Pass Low Pass Bandpass Filtering Frequency Gain Q Adjustable General Filter
$41.54Other Module BoardAdd to cartUAF42 has the following featuresHighly versatile, can be changed as high pass, low pass, band pass and band stop filters as needed (Jumper settings);The design is simple. BB has also designed a software specifically for the UAF42, which makes it easy and flexible to design different types of filters.With high precision frequency and high Q …
3pcs Geekcreit Yellow 3D Mini SMD PCB Stereo Christmas Tree DIY Music Kit
$15.84DIY Electronic KitsAdd to cartDescriptionThis is a simple mini Christmas tree DIY kit. Three different PCBs are combined into a 3D stereo Christmas tree model. A variety of different colors can be selected. It can be powered by a button battery and can be free from the power supply. Built-in 7 LED gradient modes plus 7 different Christmas melody.Manual:Click …
3pcs Geekcreit Yellow 3D Mini SMD PCB Stereo Christmas Tree DIY Music KitRead More
10pcs 2.54mm 2x4P 8P Double Row Female Straight Pin Header Needle Socket Pin Strip
$6.55Electronic Accessories & SuppliesAdd to cartSpecificationsSpacing:2.54mmGender of Connector:FemaleNumber of Pins:2x4PinType of Row:Double RowType of connector:StraightPackage included10 x 2.54mm 8P double row female straight pin header
Excellway 20Pcs JST Female and Male Battery Connector Set
$10.11ConnectorsAdd to cartDescriptionBrand:ExcellwayName:5 x JST BEC Set Female and Male Battery Connector Bu ggy Truck PlaneMaterial:metal + PlasticFeatures1. Includes 10 RC JST BEC Set Female and Male Battery Connector2. Long service life.3. Easy to install.Package Included5 x male Connectors5 x female Connectors5 x female pins5 x male pins
Reviews
There are no reviews yet.