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
Multiple Car Toys Magnetic Puzzle Box Book Educational Book Kids Learning Gift
$52.64MathematicsAdd to cartPackage included10 x Card76 x MagnetsFeatures1.Developing kids’ intelligence.2.Teaching kids to know more words.3.Easy for storage.SpecificationsColor:MulticolorMaterial:Paperboard, MagnetismSize:30x4x21.5cm
Basic Starter Kit UNO R3 Mini Breadboard LED Jumper Wire Button with Box for Geekcreit for Arduino – products that work with official Arduino boards
$18.62Module KitsAdd to cartDescriptionsPerfect for Shield Prototyping and TestingPlastic housing, metal contact clipsAccept wire with diameter 20-29AWGVolatge/current:300V/3-5A400 tie-point2 Power Lanes, Tie-point 1001 Double-strip, Tie-point 300Solderless Breadboard Size:82x55x8.5mmPackage included1 x Uno R3 Development Board1x 400 hole Breadboard10 x 220Ω resistor 5% carbon film10 x 1k resistor 5% carbon film10 x 10k resistor 5% carbon film10 x 100k resistor 5% …
3pcs ESP32-S WiFi + Bluetooth ESP32S Serial to WiFi Dual Antenna Module
$29.27Smart ModuleAdd to cartDescriptionThe main chip uses a low-power dual-core 32-bit CPU with a frequency of up to 240MHz and computing power of up to 600DMIPS.Default 32Mbit SPI Flash, 520KB SRAMSupport SoftAP and Station modeUltra-small 802.11b/g/n Wi-Fi + BT/BLE SoC moduleSupport UART/SPI/I2C/I2S/PWM/ADC/DAC, etc.Support for firmware upgrade (FOTA)Antenna supports onboard antenna or IPEX block outputPackage includes3 x Wifi module
Geekcreit 433MHz DC 12V 10A Relay 1CH Channel Wireless RF Remote Control Switch Transmitter with Receiver
$15.30Smart ModuleAdd to cartIf you need more Transmitter, please buy Product ID:1215079>>>Manual:Click here to openFeaturesEasy to install and easy to carryWith a slidable cover on the remote controlWith a hook on the remote controlUse Learning coding, stable and reliableThe wireless signal can pass through walls, floors and doorsYou can turn on or turn off the receiver with transmitter …
CO2 Refill Adapter Connector Kit W21.8-14 Thread Set for Filling SodaStream
$56.69Electrical Pump & ValveAdd to cartFeature*CO2 Refill Adapter is used to fill CO2 into your Sodastream tank.*Adjustable valve pin ensures compatibility with any cylinder valve variation.*Easy to install and use.*Made of high quality metal, high hardness and durable.Specification*Material:Metal*Color:Silver (As Pictures Show)*Inner Thread:TR21-4*Outer Thread:W21.8-14Package Contents1*CO2 Refill AdapterNotes:The real color of the item may be slightly different from the pictures shown on …
CO2 Refill Adapter Connector Kit W21.8-14 Thread Set for Filling SodaStreamRead More
30pcs 2.5-5.5V TTP223 Capacitive Touch Switch Button Self Lock Module
$15.15Other Module BoardAdd to cartFeatures 1. Size:15*11mm 2. Power:2.5-5.5V 3.Trigger setting mode:(1->Short;0->No Short) AB=00:No-lock High TTL level output; AB=01:Self-lock High TTL level output; AB=10:No-lock Low TTL level output; AB=11:Self-lock Low TTL level output; Package included 30 x 2.5-5.5V TTP223 Capacitive Touch Switch Button Self-Lock Module For
NE555 Pulse Module LM358 Duty and Frequency Adjustable Square Wave Signal Generator Upgrade Version
$6.55Test & Measuring ModuleAdd to cartFeature1. Used as a square wave signal generator to generate square wave signals for experimental development.2. Used to generate a square wave signal that drives the stepper motor driver.3. Generate adjustable pulses for use by the MCU.4. Generate adjustable pulses to control the associated circuitry.Description1. Size:3.5CM * 4.6CM1. The main chip:LM358;2. Input voltage:5V-12VDC.3. Input current:≥100MA;4. …
3pcs LM3915 Level indicator Kit DC9V-12V DIY Electronic Production Module Kit
$13.73DIY Electronic KitsAdd to cartFeatureModel:AUL-10Supply voltage:DC9V-12VAudio input:0~1.5VrmsPCB size:66 x 28mm (L x W)Light row size:62.5 x 5 x 10.7mm (L x W x H)Two indication modes:bar indication and fire spot indication (Realized by MOD short-circuit point)Lamp row offers two kinds of vertical and horizontal installationTin-treated solder padsNote:Before power on, please confirm the polarity of the power supply is correct …
3pcs LM3915 Level indicator Kit DC9V-12V DIY Electronic Production Module KitRead More
Reviews
There are no reviews yet.