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Infrared Remote Extender(PIC12F675)

2017-01-10 11:25  
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This article describes the Infrared Remote Extender (PIC12F675). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: PIC12F675.

This project sprang from the need to be able to remotely control audio-visual equipment placed inside cupboards. RF-based commercial units such as those used for home theatre were found to be overkill for this application. The circuit is based on a commonly available infrared receiver module (IRX1) and a PIC12F675 microcontroller (IC1) – see circuit. Most infrared standards specify a nominal 38kHz carrier signal for data transmission, which the module receives and demodulates.

Figure:1 Infrared Remote Extender Circuit Diagram

Figure 1 Infrared Remote Extender Circuit Diagram

Digital data output:

The digital data output from the module is fed into GP2 (pin 5) of thePICmicro, where it’s received by thePICprogram and duplicated on output GP1 (pin 6). This flashes the “Signal”LEDto give a visual indication that the extender is receiving the remote control’s transmissions.

 


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