Its been a long time since I wanted an electric coffee grinder. it had to be a burr grinder and
baying one was too expensive.
I had an old battery operated screw driver that the batteries where long gone and an old hand
driven coffee grinder. it was a match made in haven :)
Step 1: Buying the Right Transformer
The screw driver was a skil 3.6V. after taking it apart (I charged the battery first) i connected it to
a multimeter and got 4V. than connected the everything through the multimeter to get the Amp
needed. ( to find that, you have to manually stop the engine and see the max amp in the loop) I
got 4 Amp.
the closest thing I found was a led lighting transformer that was 5V 5Amps on ebay.
Step 2: Connecting a Bit to the Manual Grinder Shaft
The coffee grinder has a main shaft, and at its end a rectangular shape. I used a bit and bended
two nails to fit the both together. I tried using a plumber rock glue (it probably has a different
name) but without success. the nails work perfectly.
Step 3: Building the Base
I started to work with balsa wood and that did not work out at all.
so took an old wire wheel and
used it's plywood.
Not too much to say about this step I am sure most of you already know what to do ;)
Step 4: Power Connections
See diagram above.
I used an old computer power unit that didn't work and took its switch. I wanted a 220V switch
for safety reasons. using a switch after the transformer meant that I have live power all the time
in my grinder.
Step 5: Making Coffee
Probably a different instructaible...
I would love to hear what you think and answer any questions you may have.