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1  Using Arduino / Sensors / Re: 'Interfacing' with a bicycle - sensing braking on: October 01, 2011, 12:06:32 am
custom milling? no, the case is just sheet styrene (.080 ") with gray primer. I glued together a basic box to hold the potentiometer plus longer tangs to attach the frame mounts. Used flexible bike light straps with extra long bolts to go around the larger frame tube. To mount and use, I have to undo each strap and thread it underneath the brake cable into position on the frame, then align the wire stop screw on the pot arm onto the brake cable and snug it down - easier than it sounds. But the whole rig is custom to my bike for sure.
 
2  Using Arduino / Sensors / Re: 'Interfacing' with a bicycle - sensing braking on: September 30, 2011, 09:10:23 pm
I made a bike brake counter using a linear potentiometer and had fun building it. My uno checks the pot and when triggered by position change, writes date-time and value out to a SD file. The potentiometer is mounted along the bike top tube and clamps the brake cable with a brass wire stop nut. Easy to put on - take off the bike frame and no problems with brake interference...but my uno-SD hardware needs a better case and battery mount. I've not analyzed my data yet - other than to check that the numbers seem valid. My intent was to gather data to predict "brake pad wear" - not likely to happen quite yet, but good fun just getting the data so far.
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