lucem

Actually, you'd have a core with CS, MIDI Out connections to the FMs, and MIDI IN from the Sequencer or other note generating device.

I don't think there is a remote control feature in the midibox FM synth application - but with a little effort it should be possible to build a remote control app able to control two target FM boxes with SysEx. This would require an additional core of course, and maybe two I2C Midi I/Os. Programming skills are required too :)

The BC547 will work okay here, because the necessary voltage drop from base to emitter of apprix. .7V does not pose a problem, as in the collector-emitter track about the same voltage is lost even in switch mode; so, one can expect to deliver about 4.3V to the resistor / LED combination, which is even enough for blue LEDs. I really think there is a problem with his software, but unfortunately I haven't had time yet to look into it.

Sind 3,50€ für drei EEPROMs inkl Versand wirklich ein derart riesigen Problem, dass man sie unbedingt vermeiden will?

You forgot to include an email due date. THIS IS NOT WILBA STYLE ;)

Holy shit! It's green!

The microchip ones are quite good, too... plus, the also come in double packages :)

Nestle 1 Tamiflu 1 ilmenator 1 vout 2 boops 2 lucem 1 Total 8

Voltage upon _key press_ naturally will drop to diode cross voltage plus minus a bit if additional resistors are involved.

Now to the question itself... this is a DIY community; this means, you will nor probably find someone who will build something for you, but if you ask nicely, you will find a lot of people who will be willing to help you building your box with all the advice they can give. What you must do is specify exactly what you want to build, what it shall include, what it should do and what not. A single-line description which is at best nebulous is simply not enough for anyone to help you.

First things first... THIS IS CONSIDERED SCREAMING, so please don't write all upper-case :) Second, do not cross post in multiple forums.

Yo Sirkit, my last boards needed for FM have arrived today, I'm building two of those monsters simultaneously now - have fun while you build :) A little teaser image....

Voltage drops to 0.7V because there is a diode in the wiring, which prevents ghost keypresses - this is perfectly normal :)

rosch: Those rubber contacts are the most often used option, usually making the contact over a diode from key to octave line. If you want to build up the keyboard completely new, going for tactile or optical switches (more pricey, but usually no need to debounce) is the best option imho. If you build it from scratch, it would be advisable to adapt the more or less standard DOEPFER wiring, i.e. pulling a whole octave low, and read the keys over a pull-up. And don't forget the diodes unless you want ghost keypresses ;) slumgud: Can you tell a bit more about that philicordia? Btw, I have a salvaged 61-key manual gathering dust here, as far as I know it has the same wiring as the DOEPFER manuals you can get nowadays, if anyone would be interested... I won't have use for it in a longer time, since I'm not yet finished with my double manual keyboard :) I can make a photo too if there's need to...

fussylizard 2 (?) strophlex 3 nsunier ~10 rosch 3 ssp 2 (maybe 4) gtxdude 2 matoz 4 lucem 6 ---------------------- ~32 Yay!

Okay, if you're one of those guys, I back out again from what I said above... Insulting people who in a polite way asked to see further pictures is not the way we treat people around here.

Well, my manuals come with diode matrix contacts, so I have no xp with bar-based manuals and their distinctivenesses... Sry.

I'd want the four 6582s - got enough pulled 8580s.

Oh my god... Commodores and Legos, this must be any 80's kid's childhood flashback :)

There is a nice box called "MIDI processor" which will do the Note/CC splitting for you.

10.5V between AC pins is fine - without any load on em, the value will be a bit above the 9V that are specified, this is normal with transformer outputs.

Even simpler - just send the controller data to the CV and the note data to the FM. Your sequencer is the one sending that stuff, so let it send to both devices and good.

There are already myriads of VCO designs using the 2206 and 8038 out there. Just hook em up with a MB-CV and be done with it.

UO