bugfight

coolness!

so where's the pics? the 5v reg circuit is best outside the case because of heat (not noise) correcto you might want to check the pinout, mb-6582 wants 5v on pin 4... i would connect 5v to pins 4 and 5

the possibilities are nearly endless. anywhere an analog pot or fader is used, it could be replaced by these, except that when you let go of these, they go to 0 whereas a pot or fader stays where it was. so existing code would have to be modified, for example in the sid app. off the top of my head, reserving the bottom few values to mean "don't change" and scaling the remaining to your output range (7 bit for cc) might cover it... for mixer faders, i suspect these might not be very good because tactile feedback and positional accuracy are more important. but these would be great for a mod wheel or pitch bend or effect send, etc etc...

i'm interested, but would be more interested if leds and drivers were also in the deal...

woohoo! thanks again tk. now i can play with the aout_ng...

lookin good cimo, now if you just had those sparkfun buttons going "bling." *whack* which tube circuit did you use?

looks pretty cool. shoulda linked the vid: can they be configured to stay put, like a fader?

that description is not exact, there are no positive and negative halfs. dc is higher because the transformer is rate at RMS volts (peak * 0.707 for a sine wave), and after rectifying and filtering you wind up very close to peak voltage. Note that transformers are also rated for voltage at the rated current, with voltage rising as current drops. So expect that 10vac to drop close to 9vac when current rises to full load.

easy to overlook, since it is labeled "psu"

it's on the psu diagram: http://www.ucapps.de/mbhp/mbhp_8xsid_c64_psu_optimized.pdf

I've been thinking about modular control surface PCBs for a bit. It would be useful, for example, to have 4 encoders with DIN shift register on board, with 10 pin dil headers for in and out like smashes DIN_X4 brd. There would no doubt be different spacing needs but a small set of pcbs would be sufficient i think. Could keep a list of designs in the wiki maybe, and as someone needs a different spacing, they could do the layout and add it to the list. There are other obvious combinations, 8 buttons with leds for example 2x4 or 1x8 ... Keeping the serial registers on the PCB makes interconnections far easier, and makes the PCBs truly modular since all connections are the same. You can even mix DIN and DOUT by passing the SO or SI pin through when it isn't used. In eagle, the schematics could be shared with different pcb layouts for different control footprints/spacing Wise has done some of this already: http://www.midibox.org/forum/index.php?topic=6550.0 My first attempt at this was a 4x16 duo matrix with sparkfun buttons: http://www.midibox.org/forum/index.php?topic=10004.0

10vac is normal, since you are testing without any load, but the 5vdc is regulated, so 5.4 is too high and probably indicates the supply is near failure. There seems to be some confusion about the pinout on these. the one you linked is viewing the jack (which seems to be the more common reference) but Wilba and I think TK have supplies with 5v on the opposite lower pin (pin 4). Neither of my two c64 supplies even has a pin where pin 4 would be... I share your concern about the old commodore psu, and hope to replace mine at some point. I'm interested to see the pics you will be sharing with us of your opened psu *whack*

me too. thanks again again again wilba

especially, for example, when you realize (as i did) that the "useless" extra bit of pipe that you removed was there to dampen the water hammer effect... *whack* some lessons are more expensive than others... congrats on the homebrew though, let's see it then.

do the full SRIO test (test all three pins with each setting of the mod wheel) you should get 5v on the selected pin (selected by the mod wheel) and 0v on the other two. (note that mios studio has a bug in the mod wheel, so use midi-ox or such as instead) do this with the doutx4 disconnected, and if it passes then try with just the dout cable connected, then with the doutx4 connected. as TK suggests, you should also try with the sr removed. i do this with a micro screwdriver, slightly prying (with very little force) each side back and forth until it is free. i've had bad luck with those cheap chip pullers always winding up with bent pins... it's important to ground yourself with a proper wrist strap while handling chips also, doing dc voltage tests on the serial pins while using them to shift data will not work, since the signal is toggling rapidly back and forth from 0v to 5v. to see what's happening you would need a scope this sounds suspiciously like a cabling issue, if moving it causes a change in behavior. but check the pins first then move downstream.

yes, i meant software debouncing (in MIOS), which i still recommend with these even if cimo didn't use it before...

hehe, we denizens of the chat should avoid using chat abbreviations in the forum i think...

hey good to finally see this. you are gonna love the 6582...

for the record, i didn't mean to accuse yankohurta of anything, but your explanation is probably better than mine. i agree making 6 cores is no indication of anything sinister, i gots 14 of them myself...

I have bought from small bear, A++ good dealer. I have a bag of those switches and they are my favorite for foot switches, but note that you will need to debounce them. I have yet to find a heavy duty momentary switch with snap action...

welcome. don't take this the wrong way, but if your emails to SmashTV were along the lines of "please give me your brd files so i can copy them" then that would be why they were ignored... SmashTV's voice is official enough, don't bug TK with this. also smash is very accessible, but also is very busy.

way cool. been wanting to see someone try this.

duh

hmmm looking at pdf it appears you are right. will check pcb when i get home...

there is a passive mix out, J70. but pretty low level output there... you can read about it here: http://www.midibox.org/dokuwiki/wilba_mb_6582 (currently the last item on the page)