Simple IR transmitter circuit | | |
http://www.tkk.fi/Misc/Electronics/circuits/ir_send.html
This is an IR transmitting circuit which can be used in many projects (I designed this to try to make my 3D glasses wireless). This IR transmitter sends 40 kHz (frequency can be adjusted using R2) carrier under computer control (computer can turn the IR transmission on and off). IR carriers at around 40 kHz carrier frequency are widely used in TV remote controlling and ICs for receiving these signals are quite easily available. The circuit can be controlled using any TTL or RS-232C level control signal which makes the interfacing very simple. The circuit can be used for example for using computer to generate IR remote control signals or experimental IR data transmission.
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