The crew from AnalysIR have shared a simple technique for viewing the mark and space data from IR transmission on an oscilloscope. They call it the “silver bullet” method.
The idea is to use a standard IR Led mounted into a BNC/RCA plug using a spare channel making an Oscilloscope infrared receiver. So we set about ordering the connectors, which arrived in the post today. Another way of looking at this device is as a ‘poor-mans’ IR receiver, but if you have an Oscilloscope to plug it into then maybe you are not so poor after all. The idea is to shine your IR remote control on to the IR Led while pressing a key which results in a small amount of current passing through the IR LED. This in turn creates a voltage differential across the terminals of the Led. For this to work well, you need to have the emitter of the remote control right up against the IR LED of the receiver.
The hardware consists of an LED in parallel with a 22K resistor housed inside an RCA plug which is then inserted into a BNC adapter.
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