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Circuit Symbols of Electronic Components and two basic symbols were

Circuit Symbols of Electronic Components

Flame detection circuit diagram

Fire alarm beeping circuit diagram flame detection circuit flame detector sensor flame detector principle    

Earphone portable Circuit

Earphone portable Circuit using 1 transistor HEP 230 Portable 3v Headphone Amplifier

Simple electronic audio communication

Simple electronic audio communication simple intercom system schematic Audio communication Principles of equipment for communication with electronic audio devices, and this is the principle means of electronic communication cables Simple electronic audio communication

TV transmitter VHF Bands I, II, or band III

This TV transmitter will handle frequencies up to about 250MHz, so it will work perfectly if you have on your telly. In principle, the transmitter should work up to 500MHz or more, using the BF959 bipolar transistor. You should be able to generate a signal on UHF channel 21, but I have not (yet) tried […]

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