I had some issues with my first proto of cyclocomputer that I covered in previous post. Briefly, sensor signals and IOIO board electricity start failing when driving on rough road. That happened since I used very basic wire connectors without any locking mechanism. Now I have made some improvements to get hardware work better. I created so called shield that is attached over IOIO board and solder all wires directly to it. That solved connector issues since there is no separate connectors anymore. Shield is still removable and IOIO board can be easily removed if needed. I also improved Android user interface to have more professional look.
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| IOIO board and custom made shield where sensors are connected. |
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| Shield attached to IOIO board. |
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| Standard speedometer sensor to measure cadence. Magnet is attached to crank. |
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| Standard speedometer sensor to measure speed. |
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| Android user interface. |
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| I try to hide wires and succeeded quite well. |
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