RobMeerman.co.uk

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====== Cycling Computer Journal ======
It's always useful to have a log book for a project, so this is mine.

===== 2008-06-16 Smashed another Reed Switch =====

It turns out that [[wp>reed switch|reed switches]] are actually quite delicate. Delicate enough that once soldered into solid core (0.6mm) wire, attempting to move them into a new position by relying on the stiffness of the wire is enough to break them in two!

I'm on my third (and final!) reed switch, if I break this one I'll have to wait until I can make another trip to Maplins to get more...

===== 2008-10-18 Questions Questions... =====

Bought some kit from RS, realised just how inexperienced I am! I bought a lovely looking 3-axis accelerometer without realising how tiny it was...

{{:mbed:cycling_computer:tinyaccelerometer.jpg?320|My tiny 3-axis accelerometer}}((Photo taken with my phone. Well //I// was suprised.))

So now I'll have some fun finding/creating a PCB expander board so I can actually use it.

Also read that the mBed has 2kB of NVRAM on it and the possibility for a battery attachment to preserve the real-time clock and the contents in RAM. Need to find out if that's really different from keeping the thing on or not (when the power-proper comes back, does the program reset?)

I wish the [[http://mbed.co.uk/handbook/|handbook page]] linked to the [[http://mbed.co.uk/projects/libraries/api/mbed/trunk/|API reference]]

RobMeerman.co.uk

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