However, if one uses an unilluminated dot, this dot will cave in, causing the climber to slip and to fall to the ground.
Prior to climbing the display one has to memorise a continuous series of letters, as this is the only way to change the dots one is holding on to in time for the next change of letters.
Several months ago (around feb I think) I had intermittant problems with the nav system.
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Except a turnable bottom for changing the color, The spray can is built upon the Arduino platform and uses different sensors and electronic modules like a RFID reader, a super bright RGB LED, a Rotary Encoder, a Bluetooth module, a force sensitive resistor (FSR) and loads of wires and solder. is a project to prove that basic electronic devices can be re-created with the Arduino platform as the core processor.
It started as a curious side project, and was mentioned on Engadget, Digg, Hack-A-Day and Gizmodo.
At first ejecting and reinserting the map DVD would fix the problem, but after a while sometimes this would not work and it wouldn't come back till some time later.
Prior to this problem I had never ejected the nav disc, the car had been delivered with the disc in and I had never taken it out.