Wireless headphones receiver circuit schematic
The wireless headphones receiver presented is an standard application of ZN415 produced by Ferranti ( short wave receiver). ZN415 assures a quality reproduction, has a 1.5 battery alimentation and contains a MA detector and audio amplifier.
The current consumption is < 5mA, L1 has 40 turns, 0.2 Ø copper and 20mm Ø ferrite. C1 is adjuted with an non metal screw, the reception frequency of this wireless headphone receiver is between 1.7MHz and 3.4MHz – shortwave receiver.
This wireless receiver is to be used with this wireless headphones transmitter.
Wireless headphones schematic


about 4 months ago
Can anyone please tell me if there is any way to increase the range? How much efficient is this circuit? and if anyone has implemented it please tell me if there were any problems?