Friday, April 27, 2012

4MS SCM tap tempo mod







This simple mod adds a great tap tempo functionality to the 4MS shuffling clock multiplier.

you need a push button
1N914 diode (i didnt have any in my parts box and used a 1n4148 which works fine also)
1k resistor (you dont actually need this but its not a bad idea)

first get rid of the slip jack

I had to whittle the hole out a little to fit the button, be careful here as the metal is very soft (you can do this by hand gently with a flathead screwdriver)

the pics show how to wire it up
the blue wire has a 1k resistor in series,
the yellow wire has the diode in series with the band facing the board
(away from the switch)

basically it takes the power from the output pin of the 5v regulator via a 1k resistor to one side of the switch. The other side of the switch has the extra diode and is soldered to the cathode (the side with the band) of the diode on the pcb that comes from the input jack.

EDIT: I should point out that this may not be the same pcb revision as the current ones selling (it looks different in the user manual) so if in doubt, dont do it ;-)

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