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BUILD SMARTER e-circuits DARK SENSITIVE SWITCH Author Rajkumar Sharma [email protected] I www.anykits.com

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Page 1: Dark Sensitive Circuit

BUILD SMARTERe-circuits

DARK SENSITIVE SWITCHAuthor Rajkumar Sharma

[email protected] I www.anykits.com

Page 2: Dark Sensitive Circuit

BUILD SMARTERe-circuits

[email protected] I www.anykits.com

+C1

10u

F/5

0V

R31K

12

CN2

12V

DC

C20.1uF

D1

1N

4007

CN1

RE1

RELAY 12V

R133K

Q1BC547

PR1

47K

PR

ES

ETD2

RE

DLE

D

R41K

D3

GR

EE

NLE

D

R2LDR

+V

GND

SR. QTY. REF. DESCRIPTION

1 1 CN1 3 PIN PBT CONNECTOR

2 1 CN2 2 PCB PIN

3 1 C1 10uF/50V

4 1 C2 0.1uF

5 1 D1 1N4007

6 1 D2 RED LED

7 1 D3 GREEN LED

8 1 PR1 47K PRESET

9 1 Q1 BC547

10 1 RE1 RELAY 12V

11 1 R1 33K

12 1 R2 LDR

13 2 R3,R4 1K

A versatile dark sensitive switch useful in science fair projects.When there is a dark detector will switch on the off Relay.NO/NC relay can be use as switch. Circuits work with 12VDC, 55mA. (RELAY ON) standby current 15mA. Sensitivity isadjustable. PCB dimensions 44X49MM.

CN2 Supply in 12V DCCN1 NO/NC 24V 5Amps. Relay outputLDR Light Sensor

DARK SENSITIVE SWITCH


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