Radio Frequency
CB - FM receiver, simple 27MHz fm receiver
This is a simple FM-CB receiver built with TCA440 for listening CB ( citizen’s band ) transmissions with FM ( frequency modulation ).
CB-FM receiver circuit schematic design:
Wideband UHF Amplifier - antenna tv amplifier circuit
This UHF wideband amplifier ( Ultra High Frequency amplifier ) has a total gain of 10 to 15 dB in the 400 - 850 MHz domain frequency so it can be used where the tv signal is weak.
For this UHF antenna tv amplifier to work correctly you need to cut the components pins as short [...]
Wireless headphones transmitter circuit schematic
This wireless headphones transmitter assures a quality reception over 2 meters. The oscillator frequency is between 1750KHz and 3500KHz and for antenna we use a ferrite bar. IC1 amplifies the audio signal and TC1 is a buffer. D1 signals that the transmitter is on and is a voltage stabilizer for the oscillator .
L1 is a [...]
