Hi,
Just been working on a mod of a nano clone and thought people might be interested.
I'm currently making a christmas card for my girlfriend using the board from an old nano clone I had lying around. I desoldered and 'beeped' out the keypad with a multimeter, and have obtained the following connections (see file keypad pinout.gif).
I'm using a tiny PIC 10F200 microcontroller, an LDR to sense card is opened when light is detected, bias resistor for that, and a few tiny DTC114 surface mount transistors.
The easy bit:
I just need to obtain switch on times using a stopwatch so I know how long to switch each transistor output on for, program the PIC with the sequence and put it all into a profiled card package (lots of layers of greyboard card sandwiched together in the shape of the PCB, then skinned with a 'pretty' card outer thing to make it look like a christmas card). Oh and need to solder a tiny speaker to the headphone socket pins.
The cheesy bit:
I need to arrange some pics of me and my GF on windows movie maker with that mariah carey song 'all I want for christmas is you' :$
The frustrating bit:
My player has randomly defaulted to chinese! Which is why it was spare in the first place, which is no problem usually as my GF speaks chinese but that would kinda ruin the surprise
Still the menu options are the same, so as long as I can remember where they all are I can still manage it.
If anyone is interested I can keep you updated with progress, and share the PIC software if anyone would like to make a copy.
Hope this is useful,
Paul