Lighting Circuits

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Combined Light-/Dark-Activated Switch Circuit
DC motor driver for DCMP(AVR-008)
Mini Operated Voice Relay Schematic
wire three-way circuit between two buildings with only 3 conductors
Circuit explanation for the ultrasonic alarm
Hardware Schematics
Telephone Ringer
Fly auto disinfestation effect circuit
555 Composition with Watchdog circuit
1.8kHz signal generator circuit
Energy-saving lamp circuit