My Bluetooth Range Extender
Intro: My Bluetooth Range Extender
I use Bluetooth with Lego Mindstorms NXT most of the time, but when I need to connect to it when it is in the living room 20 feet away and around corners/through walls, it doesn't work! So, I used this I'ble: https://www.instructables.com/id/Increase-and-extend-the-range-of-a-USB-Bluetooth-d/ to add an external antenna to my Bluetooth dongle, and made a reflector out of a tin can (with a Dremel!). I'm not sure how much this helps, but it definitely does.
10 Comments
rimar2000 13 years ago
I have a suggest: the focus of a spherical concave mirror (in this case cylindrical) is located halfway between the reflecting surface and the center of curvature. If the issuer is in focus, the reflected beam is parallel in theory, that is with zero dispersion. But being in the center of curvature, the dispersion is too large, 180 degrees. I would try an intermediate option, pulling up the transmitter nearer to the can.
I can't see by the photos if your emitter is in the curvature center or not.
Rocque22 3 years ago
Jimmacle 13 years ago
rimar2000 13 years ago
Anyway, 180º is better than 360º without the can...
Jimmacle 13 years ago
mïŝlàm9 11 years ago
arukshan 12 years ago
Jimmacle 12 years ago
killerjackalope 13 years ago
I did this 'ible a while ago, the comments have a lot about maximizing range, specifically, half way through the can isn't as good as a quarter way in, so it's fully inside the dish.
Though I went with half because I needed greater range but not so badly that I cut down the "viewing angle" by the full 180 degrees.
killerjackalope 13 years ago