BottleNose -- Release. Enjoy!!
Hey Grinders,
What's up. We are releasing BottleNose this evening. Code and schematics available on page linked below.
This is a really simple version. It is meant to be a quick and easy grind. We need your help to improve it. We have a direction that we want to go with it but with a simple interface to the finger magnet you can take it further. We ideas for wireless sensors pumping to the BottleNose, glove form factors, and since we are using Arduino with a 328P you have a ton of pins to mess with.
Sorry it took so long for such a simple circuit, but we started big and simplified. Happy Grinding!
Comments
Thanks man, keep on grinding!
Now I just need to wait till I'm not homeless/ on the road and can build myself one! :)
One question, I have a magnet implanted in my 3rd and 4th fingertips. Would there be any benefit/utility to having multiple outputs for each magnet? I am thinking sending different data to different magnets...
I'm more than happy to help troubleshoot what you're working on, any issues you're facing. You mentioned the issue is with talking to the coil... are you able to get feedback from it if you run the arduino blink example and swap the LED for the coil?
I've made my own Bottlenose-type device [LINK] and I had no trouble sensing distance. This didn't use GHWz code which had some other functions if I recall. Another friend of mine, with a magnet in his wrist, had trouble sensing the field.
With all that said, this was all powered directly off an Arduino pin whereas I believe the Bottlenose used a transistor to get more power. Even better, use an H-bridge and push an AC waveform through the coil for improved sensation.
Unless you add some tricky hardware, you'll only get a square-wave from and Arduino.
tl;dr, start with a simple coil, taken from a 5V relay if possible and keep the frequency above 20Hz.
Good luck and happy hacking.