Pots vs. encoders: http://midibox.org/dokuwiki/doku.php?id=questions_and_answers
* You'd prolly want an extra encoder and some buttons for the display (to allow quick and easy menuing)
* Do you want potentiometers or encoders?
* You do want the display. It's really nice to have a display for debugging purposes, and generally helpful after debugging.
* 20 buttons -> 1 DINx4 module
* 17 + 4 = 21 analog inputs -> 1 AINx4 module
* 8 digital outputs -> 1 DOUTx1 module (get a DOUTx4 for expandability)
* You also need a power supply
More LEDs are generally nice for more visual feedback, too. Throw together a mockup of the panel, that'll help us find possible problems a lot easier :)
edit: fixed DIN/DOUT typo mixup
Welcome aboard, ANdrw :flowers:
70% of your questions are answered in the first thread you linked to. 29% percent are answered on ucapps.de.
The last 1% is this:
Depending on what you have in your spare parts drawer and where you wanna go somewhere between 0€ and 42,000,000€. With the box you linked to I am guesstimating 400-500€.
Look at the schems of the modules, get out the datasheets, check for max current draw of the active components, sum them all up, add a good bit for good measure, get back to us with the results :)
Somewhere in the depths of the sidplay source code I've found some references to the jumps, which seem to be the normal non-linearities in 6581s. Supposedly they're pretty much completely gone in 8580/6582s.
50VA means >2A per rail. That's a lot. That's way too much for an mbFM. You won't need more than a few mA per rail as the only thing the +-12V supply is driving is a bunch of TL074. So to be on the safe side and have more than enough reserves let's say 300mA so a 300mA * 12V * 2 = 7.2VA toroid will do.
Thermals bad, mmmkay :)
Ich gehöre zu jener Fraktion und löte seit jeher mit meinem ERSA 15W Kolben mit Bleistiftspitze alle Massepins ohne Probleme. Lötkolben schräg - also etwas flacher - ansetzen kann helfen :)
Für die Platine schreib Dich einfach in die Liste für Spares ein. Ich hab hier noch 2 überschüssige gm5 von TK, musst Du ihn fragen, ob Du einen haben darfst ;)
Gruß,
nILS