This simple mod allows the slide to be mounted to most cell phones, turning them into digital spectrometers.
Step 1 : Salvage springs from an old floppy disk
You need four floppy disk ( 3"1/2).
Step 2 : Modify springs
With a pince, modify springs to get arms parallel. Do it for each spring
Step 3 : Use an old photo slide
Open it
Step 4 : Soldering springs
with a candle ( or something else ) turn springs very hot ( red ), and quickly solder it on the slide.
put glue on each spring ( and in all corners ).
Step 5 : put the second side on
close the slide with the other part. Press it for 3 seconds.
Step 6 : Rubber Band
take an old mouse pad and cut four parts ( 1cm x 4.5cm )
Step 7 : Glue rubber
put one rubber part under spring. put glue. put the second part on it and press hardly for 5 seconds.
do it again.
Step 8 : Finish !!!
Not really , just one more step
Step 9 : Diffraction grating slide
put a diffraction grating slide in front of it ( glue or other ).
Now you get a very cheap and wonderfull Pocket spectrometer useable on a lot of model of cellular and sone digital camera
a more complete how-to (in French but with a lot of picture)
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