Nasta said
Nasta wrote:No. All keys must be wired between one row and one column line.
The reason being that you don't have one signal when both keys are being looked at you have two input signals and two read lines. You need to operate two independent switches at once. Could it be fudged with diodes & passive components I don't know.
signal A -----o__o------ read A
signal B -----o__o------ read B
Off the top of my head perhaps using a switch that was attached to the gates of two FETS might achieve it.
----signal A -----d__s------ read A
Gate 1 >>>>>>>> |
----signal B -----d__s------ read B
Gate 2 >>>>>>>> |
5V--singleKEY-----|
Well that was fun trying to get things in the right place.