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Wireless headphones transmitter circuit schematic

2016-02-13 19:28  
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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 toroidal core T50-2 with 80 turns, 0.2mm ?. L2 requires a 10-20cm ferrite bar, L2a has 3 turns, 0.6mm ? coiled at ground end of L2b wich has 30 turns, 0.5mm ? .
The current consumption of the wireless transmitter is <= 150mA and is to be used with this wireless headphones receiver.

Wireless headphones transmitter schematic

741 datasheet
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