Telephone Ringer Circuits

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Four Foot Box Loop Antenna
Compressor-Limiter-Clipper for FM transmitters
Optical communication system
6A regulated variable powersupply
60W Linear amplifiers
Automatic coming/leaving home light
HELIUM NEON LASER PS WITH HV PULSE IGNITION
OP amplifier using FET input type long analog timing circuit
With triac light control lamp 1
LM7805 + 5V power supply configuration
Plant-Pot Water Level Indicator Circuit



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