To evaluate the possiblity of using a capacitive slider instead of the mechanical wheel in Anelok, I made a very simple slider and gave it a try.
Here are some first impressions: http://downloads.qi-hardware.com/people/werner/anelok/tmp/anelok-cap1.ogg http://downloads.qi-hardware.com/people/werner/anelok/tmp/anelok-cap1.webm Design files and the demo application are here: https://gitorious.org/anelok/ybox/source/touch/ The sensor code is here: https://gitorious.org/anelok/ybox/source/fw/touch.c I used the Y-Box for this since the right pins happen to be conveniently accessible. The result doesn't look too bad. While the sensor wouldn't be usable in this form, I'm pleased with the range of values I'm obtaining (see below) and the overall quality of the signal. Counts Event ------- -------------------------- < 10500 No finger 10620 Normal touch on the right 10860 Normal touch on the left > 11050 Strong press on the left I could probably tune this to even better sensitivity. The environment also contributes a bit to the measurement. E.g., I had to raise all the thresholds by about 50 counts when moving the sensor from table to monitor. - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
