[sdiy] Single buss keyboard controller PCBs available

[John Mahoney]

At 06:37 PM 1/21/2007, Ray Wilson wrote:
>That's not an amateur question at all. You could probably put the 
>current source to the bottom of the buss and the ground to the top 
>and then use some op amps to invert and offset the resulting control 
>voltage so that it would be right side up again. I have not tried 
>that but it seems plausible. If I were you I would breadboard the 
>whole schmeer before buying any boards though :-)

"Invert and offset" would work.
--
john