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Electronic circuits archive 

Electronic circuits -> Domestic


Fool's day
Four/Five Channel RC Cars - TX and RX circuits using metal gate CMOS instead of custom chips.
Fridge Alarm (9k) Alerts you when the refrigerator door is left open.
Fridge door Alarm. Beeps if you left open the door over 20 seconds. 3V battery operation, simple circuitry
Frost Alarm or Cold Activated Switch
Full-duplex doorphone with 3 wires connection.
Galloping Neons (20k) Build a line-powered array of blinking neon lamps.
Garage Door Opener Scanner
General IR receiver
Generating Long Time Delays
Hand Clap Lamp Control
Headlight Reminder Circuit
Heartbeat transducer
High and Low Voltage Cutout with Delay and Melody
Hot Water Tank Indicator
IBM PC joystick
IC Controlled Emergency Light with Charger
Infra Red Remote Control Extender (IR)
Infra Red Vision System for a Toy Car
Infrared gate 2. This is an infrared gate with two sensors planned to use in the wall in the way behind a door.

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