how can I build something like this?

[Guest cyclops]

http://www.midisolutions.com/prodfsw.htm

or even more simple: something that sends a controller  message. No inputs, no footwsitch... only a button.

[goyousalukis]

Cyclops, I think the easiest would be to build a midibox plus 8 - which gives you up to 8 buttons and 8 knobs. Just hook up only one button. You wouldn't need a display, just a midi in and a midi out. You would have to set it up with sysex, but that is easy with Serge's editor. It would also be easy to use a footswitch, so long as it is normally in the open position. Just mount a 1/4" socket. Good Luck...

Justin

[TK.]

Yes, exactly :)

Best Regards, Thorsten.

[Guest cyclops]

Thanks

so, the only thing I need to build is this?

[TK.]

Yes, but you need to add the three other 10k pull-ups and the ground connections to the analog inputs in order to prevent random values.

The "initial value indicator" is just a feature and no must.

And the CNY17-II should be exchanged by a 6N138 optocoupler (circuit: see MBHP core module. The MIDIbox Plus schematics will be updated soon)

Best Regards, Thorsten.

[Guest cyclops]

Thanks Again!

I updated the image... I'm right now?

[TK.]

Nearly perfect - just two hints: the CNY17 should be replaced by a 6N138 circuit (see MBHP core module for the schematic) and the unused AN0-AN7 pins should be connected to ground

Best Regards, Thorsten.