Ever need an IR blaster for your TiVo but didn't want to wait for one to be shipped? Have an old remote and an old headphone cable? Well... you're on your way!
Find an old remote and remove its infrared LED
Find an old 1/8" stereo, or preferably, mono cable (old computer speaker system, old headphones, etc...).
Identify the anode (+) and cathode (-) on the LED. Typically the cathode will be the lead with the most material inside the LED. It holds the "cup" inside the LED. The cathode is also typically the flat side of the LED.
Strip the headphone wire to reveal the conductors.
solder the insulated wire (the red insulated wire, if using a stereo cable) to the anode (+) and the non-insulated copper wire to the cathode.
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