Picture of Nokia 3310 acceleration logger
How to make a acceleration logger in a Nokia 3310 cellular phone.

I will use it to measure the forces on roller coasters :)
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Step 1: Tools you need

Some tools you might need:

nokia 3310
soldering iron
T6 screwdriver
material to make PCB:s or a "board house"
some materials to mount on the PCB:s
a stationary drill and some mill and drill bits
a spare nokia 3310 lcd if you brake it :(
a microSD card
uALFAT chip from ghielectronics to handle the microSD card
Microchip PICkit2 to program the uP
External sensor, reused from a previous project

Step 2: Dismantle the phone

Picture of Dismantle the phone
Begin to dismantle the phone and reuse the part you need (shell, frame, battery, buzzer and battery connector).

Step 3: Make some PCB:s

Picture of Make some PCB:s
Make the PCB:s your self or let a "Board house" do them for you.

The file for the PCB:s are right here:

Step 4: Finnish the PCB:s

Picture of Finnish the PCB:s
Solder on all components on the PCB:s and make some modification :( .

Step 5: Mill and drill

Picture of Mill and drill
Mill and drill the shell and frame to make room for everything new :)

Step 6: Reassembly

Picture of Reassembly
Reassembly the unit again. Make sure that everything fits. And finally, connect the battery and program the unit. The software is not really completed, bugs to fix :(

Step 7: Testing

Picture of Testing
Now we can test the unit.

Step 8: The result

Picture of The result
The result with remote for camera sync.

And a log from Speed Monster, TusenFryd, Norway