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
20pcs DC 5V Step Up Boost Converter Voltage Regulate Power Supply Module Board with Enable ON/OFF
$72.05Boost & Buck ModuleAdd to cartSize ConversionInchesCentimetersPlease according to your own measurements to choose your suitable size. The tags inside the items will show in our Asian (Type) size.SpecificationsWorking frequency:1MHzUp to 94% Efficiency (usually is 75%-91%) Quiescent current:Turn on output 210uA,Turn off output 5uA. Operating temperature:-40~+85 →Storage temperature:-65~+150 →Size:20 x 15 x 6mmWeight:1.5g ProtectionOver current protection(OCP)Over voltage protection(OVP)Short circuit protection(SCP)Over …
3 Set 600 Pcs 15 Value Transistor TO-92 Assortment Box Kit with Box
$42.40Electronic Accessories & SuppliesAdd to cart3 Set 600 Pcs 15 Value Transistor TO-92 Assortment Box Kit With BoxFeature15 valueQuantity:1800pcsNote:Because it is manual calculations, so it is possible the number of individual inconsistencies, we hope to get your understanding.Package included3 set (15 Value) transistor TO-92 assortment box kit
RX24 10W 20R 20RJ Metal Aluminum Case High Power Resistor Golden Metal Shell Case Heatsink Resistance Resistor
$4.36Electronic Accessories & SuppliesAdd to cartFeaturesIt has the characteristics of small size, high power and high precision.It is sealed by professional technology.It has the advantages of stronger heat resistance, higher temperature resistance, moisture resistance, high anti-vibration and explosion protection.Scope of application:Testing power supply, frequency converter, automobile LED lamp, automation equipment, audio, frequency divider, servo industry and other harsh industrial control …
5V 1A in14 Nixie Tube LED Clock Glow Tube Clock Module Board Motherboard Digital Clock with Tubes Assembled
$396.89LED BoardAdd to cartDescription1. 5V 1A micro usb2. 7 colors(has RGB led.bottom light color, not the number light color)3. Use good timing IC4. Dimension:187x48mm5. Function:24hours Display model, every 5mins refresh display, No alarm.Function1.Time2. Colors back light(7 colors)3. 12/24 hour module4. Sleep module(22:00~07:00 no display. 07:00~22:00 display)5. Refresh time setting(1~9 minutes) 3,Opertate2.1.Set Time:Click ‘SET’ key into setting time. Click …
5pcs ADC CMOS CD74HC4067 16CH Channel Analog Digital Multiplexer Module Board Sensor Controller
$12.10Sensor & Detector ModuleAdd to cartDescription1. This is a board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067. This chip is like a rotary switch – it internally routes the common pin (COM in the schematic, SIG on the board) to one of 16 channel pins (CHANxx). It works with both digital and analog signals (the voltage can’t be higher …
Reviews
There are no reviews yet.