2017-08-31 (Th) gRemLen Remote Lens Holder COMPLETED

Have you ever wanted to take a cheap Chinese remote and make it highly directional? How about super long-range? Unless you’re a complete wackadoo, your answer will be “No, I don’t need that in my life.”

Well, wackadoos, I made a simple print that holds a cheap lens in front of a cheap remote to make them transmit several times further than stock by focusing the infrared beam.

Some of my laser tag subroutines responded to these infrared signals and I wanted to be able to trigger them from far away. Similarly, when folks were standing next to one another, I didn’t necessarily want to affect many people all at once. For example, if someone was acting like a jerk I may want to disable his or her vest from a long distance. Another example would be assigning teams, I may want to put you on RED team without accidentally reassigning someone from BLUE team.
“Pretty nifty, huh?”


These inexpensive remotes can be purchased from Adafruit or in kits from China. They’re all the same size and they have the same guts. I found this out when I peeled the sticker off the front, even a simple 2-button remote has contacts for all twenty-one buttons.

Identical form-factor remotes

Identical guts in both remotes

The instructions are exactly what you would expect. Print or order the parts, assemble them with four small screws (#4 , M2.5), add a Google Cardboard lens, and slide in the remote. It is "tuned" by sliding the remote back and forth to find a sweet spot. The sweet spot is where the light is collimated and you get the best range. With the remote pictured below, I was able to quaruple the working range which also did a good job of preventing the remote from triggering anything when it wasn't directly pointed at the intended receiver.

Long-range, cheap-ass remote

 The rest of the complete posts have been arranged by date.

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Completed projects from year 1 
Completed projects from year 2
Completed projects from year 3

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2017-04-11 (Tu)