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
10pcs MAX9814 High Performance Microphone AGC Amplifier Module CMA-4544PF-W
$90.79Amplifier BoardAdd to cartSpecifications– Supply Voltage:2.7v-5.5v @ 3mA current– Output:2Vpp on 1.25V bias– Frequency Response:20Hz – 20KHz– Programmable Attack and Release Ratio– Automatic gain, selectable max from 40dB, 50dB or 60dB– Low Input-Referred Noise Density of 30nV/– Low THD:0.04% (typ)– Low Power Shutdown Mode– Built-in 2V low-noise microphone bias– -40°C ~ +85°C extended temperature rangePackage included10 x Microphone …
10pcs MAX9814 High Performance Microphone AGC Amplifier Module CMA-4544PF-WRead More
T-AMP 2 x 15W TA2024 Digital Audio Amplifier Board Mini AMP
$19.04Amplifier BoardAdd to cartFeature1. The power to more than 12V current 3A2. The speaker is best to use an impedance of 4 ohms, some of the high sensitivity3. For some signal level is relatively low tone, to add the preamplifier to play the effect4. Note the positive and negative can not be reversed, use the power supplyElectrical CharacteristicsIts …
T-AMP 2 x 15W TA2024 Digital Audio Amplifier Board Mini AMPRead More
Mega 2560 R3 ATmega2560-16AU Control Module without USB Cable
$44.54Motherboard & Development BoardAdd to cartDescriptionThis is compatible R3 Mega2560 ATmega2560-16AU control board without USB cableMega is an ATmega2560 as core microcontroller development board itself has 54 groups digital I / O input / output terminal (14 groups do PWM outputs), 16 sets of simulation than the input side, group 4 UARTs (hardware serial ports), using the 16 MHz crystal …
Mega 2560 R3 ATmega2560-16AU Control Module without USB CableRead More
20W 420*380*3mm Folding PET Monocrystalline Silicon Solar Panel with Cable Dual USB
$93.62Smart Robot & Solar PanelAdd to cartSpecificationsMaximum Power(Pmax):20WOpen Circuit Voltage(Voc):18VMaximum Power Voltage(Vmp):12vMaximum Power Current(Imp):1.1AMaximum System Voltage(Imp):1000vOutput:USB 5V & DC 18VQuantity of cell:36Cell Effcience %:20%Output Tolerance:±10%Size:425*380*3mmStandard Test Conditions:Irradiance 1000w/m2Temoerature 25.C,AM=1.5Package Included1 x Solar panel with cable
5pcs 8Channel DC 5V RS485 Modbus RTU Control Module UART Relay Switch Board PLC
$45.10Relay ModuleAdd to cartDescriptions– Operating Voltage:DC 5V(5V Version)– Operating Current:10-15MA– inchopeninch inchcloseinch inchMomentaryinch inchSelf-lockinginch inchInterlockinch inchDelayinch 6 Commands– Two instruction-control mode:AT command and MODBUS command– Under the AT command ,the maximum delay is 9999 seconds– Under the MODBUS command ,the maximum delay is 255 seconds– AT commands can be made serial HyperTerminal (serial assistant) Enter;– MODBUS commands can …
5pcs 8Channel DC 5V RS485 Modbus RTU Control Module UART Relay Switch Board PLCRead More
LT1083cp 7A AC 35V Rectifier Filter Power Supply Board DIY Home theater Sound Amplifier Voltage Regulator
$24.04Power Supply ModuleAdd to cartDescriptionLT1083CP feature description (emphasis):It is a linear step-down block. Although the voltage adjustment can be adjusted from 2.5V to 37V, it is recommended that the working differential pressure is within 10V, because the power consumption is proportional to the differential pressure, the greater the differential pressure, the more heat The larger the output current, the …
Reviews
There are no reviews yet.