Light Sensitive Switch Using CA3140 Op-Amp & Relay

Light Sensitive Switch Using CA3140 (1)

Light Sensitive Switch is a simple project which operates a relay when the light falling on the LDR goes above a set point.

SCH
Supply input 12 VDC @ 50 mA
Relay output SPDT relay
Onboard preset to set the level
Relay ON LED indicator
Screw terminal connector for easy relay output connection
Four mounting holes of 3.2 mm each
PCB dimensions 44 mm x 51 mm

Light Sensitive Switch Using CA3140 (2)

Light Sensitive Switch Using CA3140 SCHEMATIC PCB & BOM

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