schematics, modifications and whatnot.
nothing very fancy here, just various stuff i've documented that others might find useful.
20 feb 2010
schematics for the modular volt/audio meter. very simple really, all directly out of the opamp datasheets. the meter clocks in at 3 kiloohms, hence the 3k resistor there at the end.
april 17 2006
sh101 external audio input modification
seeing as what i've been asked a few times how to make the external audio input for the roland sh101, here it is. the schematic, written on the obligatory napkin:
point A is to the amplifier section. point B is a direct injection to the cutoff frequency slider. i have them marked as 'on' and 'off' on the case itself, for some reason. below are a few internal shots.
as the astute will notice, i've taken two wires to ground where one would have been enough. this whole mod can be done in about an hour, but i'm sure i used a lot more time.
this modification is from some place i found on the interweb years ago, but didn't save the link and can't find it now. if you feel you deserve a credit, by all means contact me.