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Pyroelectric Human IR Infrared Sensor Detector Module DIY Kit Anti-theft Circuit Sensor Module for Home Security System

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$5.99 $4.43
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Price$5.49$4.99
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Description:
The pyroelectric infrared sensor anti-theft circuit consists of pyroelectric infrared sensor PIR, integrated operational amplifier LM358, voltage comparator LM393, 110 alarm circuit and startup delay circuit. The circuit can be used for household anti-theft. When the family leaves the room, the switch K1 is closed and the circuit starts to work. As soon as someone enters the room for a period of time, it will sound the alarm.

Principle:
1>. When 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 pin output transistor VT1 weak after amplification, and then through the C2 input to the op amp IC2A 3 pin high gain low noise amplifier, and then by IC2A's 1 pin output signal.
2>. When the IC2B acts as a voltage comparator in the circuit, its "5" pin provides the reference voltage by the R10 and VD1. When the IC2A pin output signal "1" IC2B "6" feet, "5" and "6 foot" input voltage is compared, if the "6 foot" voltage than the "5" feet high, then the IC2B 7 feet 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 "than" 3 "feet of a resistance R14, partial pressure of R15 with low IC3, the" 1 foot "into a high VT2 transistor conduction music chip IC4 the" 2 foot "voltage, output audio signal after amplification transistor VT4, buzzer driver BELL issued 110 alarm sounds.
3>. When the person leaves the detection area, IC2B's "7" foot becomes high, and the VD2 is cut off. The C6 has a charging time (30 seconds), which makes the buzzer delay the alarm for 30 seconds.
4>. The Power-on delay circuit that is made up of VT3、R20 and C7 which delay time is 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.

Warm Tips:
This is the delivery suite of parts, you need soldering installation. SCM has written procedures, successfully tested.

Component List:

NO. Component Name PCB Marker Parameter QTY
1 SMD Resistor R3,R19 1K 2
2 SMD Resistor R7,16,R11,R10 10K 5
3 SMD Resistor R22,R17 33K 2
4 SMD Resistor R18 100ohm 1
5 SMD Resistor R5,R6,R9,R14,R12 100K 5
6 SMD Resistor R8,R13,R15 270K 3
7 SMD Resistor R20 510K 1
8 Metal Film Resistor R23 10K 1
9 Metal Film Resistor R21 220K 1
10 Monolithic Capacitor C4 0.01uF 103 1
11 Diode VD1-VD8 1N4001 8
12 Electrolytic Capacitor C3,C5 22uF 2
13 Electrolytic Capacitor C1,C2,C6,C7,C8,C9 47uF 6
14 Electrolytic Capacitor C10 220uF 1
15 SMD Resistor R4 4.7K 1
16 SMD Resistor R2 1M 1
17 SMD Resistor R1 47K 1
18 Monolithic Capacitor C11 0.1uF 104 1
19 Passive buzzer HA   1
20 Infrared sensor PIR   1
21 Potentiometer RP1 100K 1
22 LM7805 IC1 TO-220 1
23 LM358 IC2 SOP-8 1
24 LM393 IC3 SOP-8 1
25 Terminals J1 2P 1
26 Self-Locking Switch S1   1
27 Music chip   TQ9561 1
28 Fresnel lens   24*24MM 1
29 PCB   45*82mm 1

 

Finished Product Picture:

I. Tested by ICStation's Outstanding Partner LearningZone:

As soon as someone enters the room for a period of time, the buzzer will sound the alarm.
(You could hear the alarm from below video project~~)



Learn More Details in the Video:

(The language in the video is English)

 

II. Tested by ICStation's Outstanding Partner OnlyKit.:

Learn More Details in the Video:
(The language in the video is Russian)

Quantity5+15+
Price$5.49$4.99
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Pyroelectric Human IR Infrared Sensor Detector Module DIY Kit Anti-theft Circuit Sensor Module for Home Security System
$4.43
$5.99
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