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IR REMOTE-CONTROLLED VIDEO MULTIPLEXER

by Peter Gibbs

Start ý The Objectives ý Circuit Operation ý Decoding the URIC ý Short Program ý The Multiplexer Design ý Software ý Sources and PDF

Where I work, the Physics Department needed to visually monitor a number of unattended experiments in various rooms. Multi-channel video monitoring and security systems, however, are usually high-cost, elaborate pieces of equipment requiring expert installation, which results in an isolated user who must call a technician for even minor modifications.

Therefore, I decided to construct a system that would use off-the-shelf components, allow user modification without denting the departmentýs budget, and still allow you to monitor the experiments at will or under an automated scanning sequence from a remote location (see Photo 1).

Photo 1ýHere you can see an internal view of the video decoder with an IR sensor on the lower right, a seven-segment digit on the lower left, and a buzzer near the center of the perfboard.

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