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Just ordered my FreeRunner.
I want to use it as bicycle computer.
These are just ideas and wishes - not worth to make a separate wiki page.
Due to the relatively high current consumption of the Freerunner a power supply from a hub dynamo seems to be unavoidable.
I have a evaluation board of a Linear Technologies step converter which I will use at the beginning.
Of the travelled track and also of the upcoming (hopefully OSM will soon provide elevation information of the roads)
Garmin Etrex Legends trip information display is to stupid. I want infos for the current day and for the time since last break.
The GPS does not give sufficiently accurate vertical speed. A barometric sensor (see Variometer) would be nice. Calculation of the vertical speed by integrating the accelerometer readings also not accurate. But maybe it is possible to use the accelerometers to measure the slope of the road. How to calibrate it? Is it possible to automatically calibrate it from GSP reading?
By measuring the increase of the total acceleration not by change of the acceleration angle.
Can the road (e.i. surface) quality be recorded by measuring the vibrations with the accelerometers?
... using the builtin microphone. Or would it be possible with the accelerometers using high sampling rate?
Are there Bluetooth Heart Rate Transmitters available?
Pedal sensors with Bluetooth and power supply by magnetic induction would be nice.
Otherwise USB with an FTDI chip.
I would like to have a simple application to add map information at my current location. Say, I am standing beneath an ATM, just use a menu item "Add ATM" and typing in its name - finished. There is no need for a map display. The program just displays the OSM nodes near the current location. And you can add a new node or modify an existing node.
There is not much space to use the touchscreen as an ordinary piano keyboard.
What about using the touchscreen like the left hand fingering on a guitar, mandolin, banjo ore similar? The touchscreen lays in front of you in landscape mode. There are four rows, one for each finger.
| D# | G | B | d# | | D | F# | A# | d | | C# | F | A | c# | | C | E | G# | c | This layout might be to simple. Should it be optimized for easy chord playing?
Octave shifting via accelerometer reading?