Infrared receiver

Posted on Nov 10, 2012

The circuit consists of Ql—a phototransistor that responds to an intensity of amplitude-modulated IR light source—and a three-stage, high-gain audio amplifier. Transformer Tl is used to match the output impedance of the receiver to today's popular low-impedance (low-Z) headphones;

Infrared receiver
Click here to download the full size of the above Circuit.

but if a set of 1000-2000 ohm, magnetic (not crystal), high-impedance (high-Z) phones are to be used, remove Tl and connect the high-Z phones in place of Tl's primary winding—the 1000-ohm winding.

Leave Comment

characters left:

New Circuits



Popular Circuits

Scoring Game circuit
Capacitance switched light
Electronic Gong Circuit
how to make digital voltmeter
Solar-Powered High Efficiency Battery Charger
STI7167 Advanced STB Decoder With Integrated DVB-T/DVB-C Demodulator
ISL62386 High-Efficiency Quad Output System Power Supply Controller for Notebook Computers
Ethernet Hardware Schematics
Marshall JTM-45 and 62 Bluesbreaker Reissue Modifications