Connecting a pedal to the AIN

[s4ndp4pper]

Hi... I'm making a Mb64 and are planning for it to have a pair of 6.3mm (1/4") jacks, so i can connect  control pedals like on a synth.

Can i connect the jacks directly to the AIN module just like pots/sliders, or do i need extra resistors and stuff?

I also plan to connect jacks to the DINX4 (for foot switches) and have the same dilemma about that.

Another question btw:

I thought about connecting the DINX4's expansion port (J2) to a 9pin D-SUB, so i can connect another DINX4 as a external device (are planning to making a simple keyboard, Kraftwerk style :-). Can i do this, or will i get random MIDI messsages whenever the port is not connected?

/J

[pilo]

if it's expression pedal (for volume for example) you can plug them with stereo jack on AIN modules, if it's just a switch pedal, connecet them on a DIN module ;)

For the external DIN, I think it work if the cable is not too long... (don't exactly how long it can be)

[s4ndp4pper]

OK, thanks... i am totally ??? about electronics... =)

[TK.]

see this schematic from Matteo Bosi:

http://www.ucapps.de/midibox_ext/ep/expressionpedal.gif

Best Regards, Thorsten.,

[s4ndp4pper]

For the external DIN, I think it work if the cable is not too long... (don't exactly how long it can be)

Anyone who knows about that? First one who does gets a dirty swedish joke  ;D

[pay_c]

That can be pretty long!! Its just an digital on or off. I would guess at least 5m or more (especially if u you use a shielded cable!).

If you should encounter problems, or want to make it even longer, you can lower the R at the depending pin of the IC, which pulls the pin up to 5V (the original R is 10k I think, so you could go down to 4,7k or so). But I would rather first try it out with the original R, so the IC doesn´t get blown accidentially (although this shouldn´t happen as long as you keep the R above 1k).

Just use a shielded cable and everything should be pretty fine up to 5m or more.

[s4ndp4pper]

Great, thanks! And as i promised:

http://www.sr.se/p3/rally/sounds/ra9706g2.ram

[pay_c]

OK, thnx, although I have *no* idea what this guy is talking about, cause I don´t speak one word swedish...  ;D ;)

[JazzyPidjay]

hi !

anybody know if all the expression pedal are built

with 10kOhm potentiometer inside ?

can i buy any model of expression pedal ?

thanks very much.

[Wise]

Hehe, you just have to love this screaming maniac GUNDEMAN :)

/Wise (from Sweden....)

[JazzyPidjay]

???

i think i haven't understand  ::)

[pilo]

I don't understand too ;)

But I think that other value can be used without any trouble. I

[JazzyPidjay]

thanks  ;)