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
Magic Ball Classic 8 fortune Teller Toy Party Answer Decision Game Decorations Gift
$32.39PhysicsAdd to cartSpecificationMaterial:PlasticColor:BlackMagic Ball Diameter:10cm /3.94 Inch(appr.)Features1. Made of plastic material, durable and easy to play.2. Think of a problem in your mind and hold the ball for advice.3. There are many answers advice for you to solve the question.4. It can also be used to create an active party.5. Best gift for your friends.Package Included1X Magic …
Magic Ball Classic 8 fortune Teller Toy Party Answer Decision Game Decorations GiftRead More
500mL Pyriform Borosilicate Glass Separatory Funnel Pear Shape Glass Stopcock Laboratory
$52.64Laboratory BottleAdd to cartSpecificationMaterial:Borosilicate GlassCapacity:500mLShape:Pear ShapeType:Glass StopcockGround Joints:24/26Features– Separatory funnel for separating liquids with different densities.– High transparency, ungraduated.– Borosilicate glass material ensure its clarity, strength, heat and chemical resistance.– Glass top stopper and glass key stopcock.– Glass stopcock requires greasing for sealing.– Conical shape ensures highest density liquid is dispensed.– Widely used in school teaching, laboratory experiment.Package …
500mL Pyriform Borosilicate Glass Separatory Funnel Pear Shape Glass Stopcock LaboratoryRead More
HEPA Replacement Filter for Dyson TP00 TP02 TP03 AM11 Pure Air Cleaner Purifier
$68.84Solar CollectorsAdd to cartReplacement HEPA Filter For Dy-son TP00 TP02 TP03 AM11 Pure Air Purifier CleanerFeaturePretty nice replacement for Dy-son air purifier.Effectively remove allergens and pollu-tants and captures ultra-fine particles from the air including pollen, bacteria and pet dander, etc.Easy to install.Help capture odors and potentially harmful toxins like paint fumes Year-round purification and circulation smooth oscillation.SpecificationSize:18.8*19cmSuitable for:DY-SON …
HEPA Replacement Filter for Dyson TP00 TP02 TP03 AM11 Pure Air Cleaner PurifierRead More
10pcs USB Mini Adjustable Speed Fan Module Wind Speed Governor Computer Cooling Mute
$26.60Power Supply 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.FeatureInput voltage:DC4V-12VOutput voltage:DC2.5V-7.5VRated power:5W (Do not overload use)Product features:USB fan speed adjustment, stepless speed adjustment.You can use it by plugging in a 5V USB interface.Package includes10 x Wind Speed Governor↘. 5V USB …
10pcs USB Mini Adjustable Speed Fan Module Wind Speed Governor Computer Cooling MuteRead More
50pcs 40Pin 2.54mm Female Header Connector Socket for DIY
$23.96Electronic Accessories & SuppliesAdd to cartFeaturePitch:2.54mmGender of connector:femalePin material:copperType of row:single rowNumber of pins:1 x 40 PinQuantity:50pcsPackage included50 x 2.54mm 40 pin female header connector socket
Step Down Module Constant Current Drive Power TTL Suitable for 200mW-2W 405/445/450/520nm Red/Green/Blue Lasers
$22.44Power Supply 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.SpecificationCircuit control:12V step-down circuit, constant current output (current and voltage are adjustable)Output specifications:Max 2AScope of application:200mW-2W 405/445/450 / 520nm red, green and blue laser drive powerDimensions:29 * 49mm (width * length), component …
5PCS FR4 180x120mm Single Side Copper Clad Laminate PCB Circuit Board CCL
$16.39Electronic Accessories & SuppliesAdd to cartSpecificationPanel Size:Approx.180mm x 120mm or 7.09′ x 4.73′ (inch)Thickness:0.06′ ÷0.005 (1.5mm ÷ 0.15)Weight:Approx.58gLayers:Single SidePanel:FR4Operating temperature:Up to 140 C or 285FDescriptionThis Single PCB Copper Clad Laminate Board is made of copper foil by the hot-pressing technology.steel-wool, Restore4, Tarn-X, roscherite, Zap or similar before using.After that be sure to rinse and dry so without any water spots.Combined …
5PCS FR4 180x120mm Single Side Copper Clad Laminate PCB Circuit Board CCLRead More
3Pcs 330UF 450V 25x50mm Radial Aluminium Electrolytic Capacitor High Frequency 105C
$23.81Electronic Accessories & SuppliesAdd to cartFeatureHigh precision and stability, Low impedance, Long lifeSpecificationCapacitance:330 uFVoltage:450 VMax Temperature:105°CColor:Black GoldDiameter:25 mmHeight:50 mmType:Through HoleSafe & ReliableCoupling capacitors isolate strong and weak current, provide high frequency signal path, prevent power frequency current from entering weak current system, and ensure personal safetyApplicationWidely used in blocking, coupling, bypass, filtering, tuning circuit, energy conversion, control circuit and other …
3Pcs 330UF 450V 25x50mm Radial Aluminium Electrolytic Capacitor High Frequency 105CRead More
Reviews
There are no reviews yet.