Blatboy
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Posts posted by Blatboy
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While I don't have experience with Midibox FM myself, you can find a lot of information on the Wiki at http://www.midibox.org/dokuwiki/doku.php?id=home:project:midibox_fm
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Hmmm. Ok. I figured out what I had done before. I also used an arp in conjunction with LFOs assigned to pitch.
I just answered my question. Sorry to bug you. Haha.
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When assigning an LFO to the pitch of an oscillator, is there a way to have it modulate in notes as opposed to a smooth curve/line in pitch? I can't seem to figure this one out. I've done a lot of effects in the past using that technique and would love to use it on my 6582.
If this question was answered in the past umpteen million times, I apologize. Search wasn't working out for me today...
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I put you on the replacement/waiting list.
Awesome. Thanks!
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If for some reason someone doesn't claim theirs, I'll take one.... or put me on the next buy...
:)
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So, I've installed everything... also changed my power supply to a type, and used Altitude's post as a guide.
So far, things seem to be working like a charm. I'll put it though more rigorous testing later this week.
Thanks for the help!
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Thanks for the help on that. Hmmm. Sometimes the parametric search doesn't always come up with the best parts. Don't know how I missed the cheap connector, perhaps I'm not doing it the best way. I'm glad you pointed it out.
I made the adjustments to the order and sent it in. Thanks again.
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I'll bite
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Holy jehosaphatt!
This solution is so incredible. Originally I was thinking about spending $60-100 bucks on a box I'd have to build and carry around. Now that I've re-read Altitude's original post (for the 50th time probably, but I think it finally got through my thick freakin' skull) I get it. And here I am about to spend $15-$35 on parts and barely anything to build. I'm going to get crazy and get TWO wall warts... one for the studio and one for the gig bag.
This regulator:
and this wall wart:
and, if I want a connector...this guy...
Hook up the wall wart to the pins that were originally the AC pins... take out the rectifier... do that one jumper wire on the bottom of the base board... and I'm good to go, right?
So simple.
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No. The 9VAC is rectified and smoothed providing ~11.4VDC to the 7809 . You cannot run a 7809 off an AC voltage, it has to be a (well) smoothed DC voltage.
Ugh. I knew this, yet wasn't thinking, obviously. Sorry.
You dont need the 1.5A Recom, the 500 mA ($3) one is fine, the SIDs draw 80% of the current
Awesome. Thanks.
I really appreciate you guys taking the time to answer my (sometimes ill-thought) questions.
I'll do a switching supply. I have other things to fix on my unit as it is...I'm sure that's enough to make a "project" out of this.
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That TI DC to DC converter is obsolete and unavailable...
This should do, yes?
http://www.mouser.com/ProductDetail/RECOM-Power/R-78B50-15/?qs=sGAEpiMZZMuur7c7MCGU2MKVsZpEbW5x
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Thanks for the link. I remembered that thread but couldn't for the life of me find it again.
I guess the idea of having one supply (linear) for the studio and one for gigs doesn't really work I need to bypass the rectifier for one and not the other.
Hmmm. Unless I put the rectifier in the external linear supply so that both solutions bring in 12VDC.
Yeah. I'm probably getting stupidly crazy with this. I should probably do what altitude did, regardless of my class project situation. If it ain't fixed, don't break it!! uh.... or something like that.
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That's the part I didn't quite 100% understand, but I guess I did read that right then. So, it is ok to put 12VDC in the 9VAC rails. But, the C64 supply works, yes? It supplies only 9VAC to the 7809 on the control board, yes?
If I was to use wall warts... did you just snip off the plugs at the end and hook it up to a 7 pin din connector? Do you have a picture of yours? I'd love to see how you set it up. Even if it's not fancy, PM me a shot, if that's ok. I just checked out your pictures. OMG your SEQv4 w/the BLM is freakin' incredible. I need a cigarette after just seeing that. Jeez.
Ahem. Back to the power supply... I know it's not the easiest nor the most cost effective to go with a linear design. I do need a project for my class, and the wall warts, while certainly the most direct route, may not be beefy enough for the project. (Yeah, I know... pick another project. I'm not that creative.) We'll see though. I may make a linear one to keep in the studio and just use you wall wart setup on live gigs. Less to carry.
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BTW the Hakko 808 has been discontinued...
now they have the FR300
http://www.hakko.com/english/products/hakko_fr300.html
According to reviews it's better (minus one or two things)
I just picked up one and have no complaints, except they are closer to $300 not 200 unfortunately.
I would trust this thing to pull out old SIDs.
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...and, regarding that transformer... If I can't find one with two 9V secondaries, would it be ok to just do both rails off of one 120V/9V transformer? Using two transformers looks like it'll be really heavy. Even just a single 9V transformer isn't small...
Ooooooh. Actually, I think I found a dual output transformer.... would this:
solve my dilemma?
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I've gone through and read most everything I could find about power supplies in the forums here. (Including the ) Outside of the fact that my brain is melting onto the keyboard as I type right now, I think I have a gist. I'd like to try to summarize here to be sure I'm on the right track, and I also have a couple questions.
My MB-6582 has PSU option B. I have all 8580s... I do have a couple 6581s but I don't have plans on using them.
I'll be assembling this supply as a project in a class I'm taking. This week I'll need to decide between linear and switching designs and then order parts. If I did a linear supply, I'd use and put it in a plastic case. All this makes sense to me. It's just a matter of doing a good, compact, well heat-sinked physical design...and finding the right transformer. I'm having difficulty finding a 120V primary to 2 X 9V secondary transformer...
Being that I plan on using my MB-6582 for live gigs, portability is a concern...I'm intrigued by the idea of a smaller, lighter PSU. So, I'm looking at the switching options. The Meanwell RPT-60B looks like a one stop simple solution. Just to be sure I understand correctly... even though the 2nd output is plus/minus 12VDC, it's ok to use those in the 9VAC input? I saw some other designs with circuitry after the RPD-60B. Would that be necessary?
Lastly, regarding the connection to the MB-6582 itself from the new power supply... outside of sacrificing an old C64 PSU for it's cable and connector, (which I don't have an extra... why did I throw that old one out?) what kind of cable do I get? The connection is 7 pin din, but only 4 of the pins are used, yes? Or, in the end, is it just better to get another old C64 PSU (hopefully not working, to save the buck) and cut the cable?
Thanks so much for any thoughts! I know this subject has been rehashed many times...
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I used a 4u for a while. Not supported very well, and it's not got as much flexibility as Mios... plus you're tied to a computer, which may or may not be an issue. However, as as long as you're using XP, it should work ok.
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Greetings. Just wanted to give a little update. Work got crazy for a year or two, and now things are slowing down again. My MB-6582 is working ok, but still has some (notes occasionally sticking, encoders tripping out) I have, off and on, opened it up and cleaned it up more. I think most my issues have involved the connection of the ribbon cables that go between the main board and the control surface. Now that I have all those connections pretty solid (with heat shrink) it seems to be behaving better.
In general, I've been spending more time on my electronics bench and honing in my skills. I've begun work and am almost finished building my own benchtop variable voltage power supply for projects. I'm taking an electronics mentoring course with Jeff Blekinsopp (synth tech w/Pink Floyd...a designer on the Voyetra Eight, etc etc) and as my project in the class I'll be building a new linear power supply for my MB-6582. Hopefully, this also will help. I'm still not 100% sure I can depend on it for a live gig. (This, of course, is my own fault as I probably jumped into the MB-6582 before I really had the skills.)
Assuming I can get this thing really solid (and I feel I can)... perhaps a MIDIbox SEQ is in my near(ish) future? Hmmmm. Well, one thing at a time.
Thanks again for all your help.
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Alas I didn't remove the indentions... they never bothered me...
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Yeah. I have that problem on about 9 of mine, in varying degrees of badness...I have issues with my Alpha encoders that I bought from Mouser. For example, if I turn CUTOFF clockwise going from 000 towards 255, it sometimes jumps a few steps counter-clockwise randomly now and then along the way, which is extremely annoying. If I turn the knob really slow, I don't have this problem. If it's the encoders fault or a solder/building issue, I cannot tell. -
I'm also having problems with some of my encoders. That said, I never thought it could be the encoders. I've been troubleshooting my MB-6582 again (I'll start a new thread on this soon, sorry to threaten everyone here haha) and I have noticed possible short circuits where I don't think there should be. Whether this is a bad soldering job somewhere (possible) or the encoder itself, I donno. I have the same problem that Scifo has... on the cutoff and also on my main selection encoder to the right of the LCD. I will explain the short circuits etc in more detail once I get my ducks in a row. Could be tonight...
I'm using the Alpha encoders...I didn't take the indentions out though. I kinda like them.
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ooooh. Sad I missed this one. Hopefully will catch the next one.
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I've been pretty thrilled that the folks at the network actually love "the old video game sounds." Working for other shows in the past, when I've tried to put some SID or other types of old cheeky electronics (theremin, my old Lowrey organ, the wurli), the producers would tell me to take it out as to not scare the little children, and it wouldn't even make it to the network folks. (Most my work is in the world of cartoons for pre-schoolers.) This new situation is awesome, being able to use some of the retro electronics I like to obsess over as part of my job...
The show will start airing in the US in the fall. I'll put more info out closer to that date...
I've also been using the MB-6582 for outer space themed sound effects. Fun stuff... (extreme portamento!)
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Just wanted to let you know I'm having a blast with my MB-6582. Here are some examples of demos for the new cartoon I'm working on. This particular episode puts the characters on the Purple Planet. What's a better match for the Purple Planet than some phat SID?
hope u like.
BLM 16x16+X PCB and case order [CLOSED/waitlist]
in Bulk Orders
Posted · Edited by Blatboy
Ahh! I can't believe I missed this. Rats. If there indeed is a wait list for another order, please put me on it.
blatboy (PCB+Case)
thanks.