t_xen

The trannys I used for the gates are 2 Fairchild BC547A. yes, I payed attention the pinout. ;)

no data on your LCD? that's pretty odd. especially if the LCD test was already fine. how do you have it connected? Is the ribbon cable soldered directly to the pins? If so, make sure a single wire didn't fray and is shorting to another pin someplace. I seem to remember something like this happening to me. try shutting it off, start the upload in "smart mode", and then turn it on to re upload the file. I think I remember having to do this several times to get mine to work when I thought I fried it at first.

ok. first test didn't go well at all. I plugged it into my MBCV box and hit the power. got the green LED light. connected my volt meter to the end of the patch cable off the jack and got a steady 10.75v. set the calibration menu to 1v and was still reading 10.7v. I selected 2v and still was reading the same from the patch cable. this reading was taken on CV1. attempted adjusting the trimmer and there was no change in voltage (probably shorted by solder overflow). I hit one of the keys on the keyboard and none of the Gate LEDs lit. for no reason, voltage off the negative rail has dropped to about 1v. I suspect I have a short someplace. likely on the PSU since that's where I checked the voltage. the positive rail is still fine though. so, I wonder if there is a problem with the DIN cable length since I got no Gate indication, but the DACs are getting proper voltage at the correct pins. looks like I have quite a few bugs to work out and fix. I did a trace continuity check on all the pins of the ICs and that came out fine. to do: 1. go over board and make sure there are no shorts. 2. what IS the maximum length of the DIN cable before the signal across the lines degrade? 3. check underside of trimmers to make sure there are no bridges. 4. check PSU for shorts and/or breaks.

Please lock this thread. It's not doing anyone any good by remaining open.

This idea started because I have an analog synth and a MBSID that I wanted to control with external filters. I created a homebrew AOUT PCB and got a pair of MAX525s as free samples. since I have no drill I surface mounted all the components. I've conceived an idea of the MBHP-AOUT module as a self contained Aout or Aout_NG with it's own dedicated Bipolar Power supply. I constructed the Power supply and populated the DIY Aout board. This Aout is still in the testing phase. The module will include it's own DIN connection (NOT MIDI) for connecting to another DIN wired to the appropriate jacks on the core of a specific midibox project. This will ensure that it's swappable between different Midibox projects. just wire up a DIN appropriate for the added Aout module. Here is a concept design for the panel with the DIN Link. This could be awhile, but I will post pics when all 3 of my projects are in new cases with new panels. ;D

let me add to that. I'll trade for a 6582, an 8580, or sell for US$26.00 for the lot.

I have an Aout_LC homebrew PCB populated board that I no longer need. I'll trade for a single 6582 or 8580. *IC's not included. Yes. these parts are surface mounted. it has been tested and used. I'm getting letting go of it because I have constructed the Aout with the MAX525s. If you need a larger more detailed image, let me know. I'll even throw in a full set of the OPL3 chips. 1 YHF262-M 2 YAC512-M

aside from the insults..... what do you not agree with?

I would like to retract the harsh response that I gave. I just felt like I was being offended. I admit that at times I'm known to jump off the handle. After giving sometime to think about what I had posted, I kinda feel a little embarrassed about myself. :-\ Anyhow, I'm going stay off this thread cuz my reaction and other ppls reaction doesn't represent the spirit of this community and I feel a bit guilty for the post that I made. :-[

ok, now I'm pissed after the "really friendly community" comment...... droolmaster..... get a fvcking tissue and wipe your mouth off cuz here's reality.... 1. We all help out each other here cuz we took the time, blood, sweat, and tears to build our own. 2. This "IS" a friendly community cuz we all love the knowledge gained from working on these projects from the ground up. 3. Yea, you can build your own if you're not afraid of picking up a soldering iron, and taking the time to do this. all you need to know is how to draw. 4. If you take apart the shit you paid for, do some fvcking research, you'd be able to find the answers you're looking for, but don't ask us for help. and lastly, if you read the GPL, you would know that none of the hardware or software can be resold without TK's permission, so your purchase from the thief made you an accomplice. Just like if you bought a stolen product from a thief that stole said product from soneone's house. think about it. What would a COP do to you after learning you purchased "hot" or stolen property from a fvcking thief? It has been stated, that we, as a community, refuse to help someone that has bought stolen IP off TK for capitol. Hell, we're even lucky that TK even made all this public under his license, otherwise he'd prolly be making a killing like that asshole that sold you that pile of shit. >:(

http://www.midibox.org/forum/index.php?topic=10302.0

*whack* --as a kid I would use my electric train transformer to stick my fingers on the poles, then slowly crank the voltage to see how much power I could take-- ::) do all hardware geeks such as myself have the crazy wispy hairs like someone electrocuted themselves? :o *bzzzZZZZZZZZZ!!!!! WHACK!* OW! It bit me! ;D

Sweet! ;D

Awesome! ;D I'm going to implement a few modifications to my soundlab minisynth. Need to add a CV inputs for external control on the VCF, AR generator, and the VCA. This should sound sweet! An analog synth driven by a 303 engine. Should sound mighty warm! THANK YOU, TK! :D

TK...... It's Christmas. Take your time. :)

hrm. I've been pouring over the source for a couple of hours at a time over the last few days. I cannot figure out where to even begin to implement the modded code to forward notes to the aout module. ??? I'm not much of a coder. :P Perhaps I am jumping the gun, and TK is already doing the code prep. Maybe he might still need to know more details of what we are looking for, Gavgomad. It would be cool if there was something documented like "insert this code into source file "X" for option A, or insert this code into source file "X" for option B". ;)

It took about a week to get mine. they didn't have any in stock in the US so mine were mailed out from Thailand. Pretty fast for sending them overseas. :)

There's also an alternative to the Simplesizer. http://www.musicfromouterspace.com/analogsynth/SOUNDLABMINISYNTH/soundlab.html The oscillators are linear V/Oct with hard-sync, An AR generator, VCA, VCF, LFO. There are Prototype sections on the board so you can add in your on Ring Modulation circuit, and a S&H circuit. There's even mod information to build in an option for modulating VCO2 with VCO1s output for FM effects. I have one of these I've built that I would like to use with the SIDv2 application modded with the Key to AOUT option.

I would have no problem recompiling a new .hex file as well. :D I have built a cigar box sized synth and would like to use it as a bassline type of machine. ;D

"Why another 303 clone?" A sort of short answer... A simple mbhp based synth that doesn't require desoldering any OPL3 chips from soundcards, or raping a C64 for its SID. An alternative to currently available 303 clones that uses "rare/obsolete" parts. I cannot find one available that has complete documentation that uses modern hardware. Currently available clones have a very long wait list because of the rarity of some components are becoming harder to source. (I don't think SIDs will be around forever) ;)

TK: I can't really think of any other functions that would be needed. Although a simple sequencer would be nice. After giving it some thought, that could be already covered by the WT editor, however I could probably throw on a couple of DIN modules, modify the app source and use the buttons for the note keys on the sequencer. ;) jimp: The original 303 uses a V/Hz scale for note tracking. Still wondering if I should attempt either that or 1v/Oct scaling. Gonna go which has better tracking. And to keep the VCO circuit simple, It will only have Saw and Square waveform generation implemented. Thanks for all your comments guys. I though I was just having a case of insane wishful thinking, but seeing how many people are starting to get all over this, then I figure this should be a fairly worthwhile project to offer up to the community. I'll prolly not post for the next 2 weeks since I'm heading off the continent to an island in the middle of the pacific (goin' to hawaii) for a Christmas pineapple. :P In the meantime, I'll be researching more on modern component replacements to use. After these are done, I'll start building a board layout. I give props to the creators of the ML-303 and the x0xb0x and Ultra303 (CPU Replacement project) as an inspiration to even think of starting this. :D

If I'm understanding this correctly, does the SIDv2 firmware have the possibility of controlling Linear VCOs as well? Perhaps I should read up on the documentation on it. ::)

I'm using the "iron on" transfer method. :P I'll probably not do this when I create the mainboard for the clone. As soon as funding permits, I'll have the boards professionally fabricated. Toner transfer isn't too bad for quick one offs. Sometimes the traces don't come out after a transfer attempt, but I easily clean them up with a fine point Sharpie marker. ;)

I might be crazy or insane, but I had this thought. is there anyway to write an application for the MBHP_Core module to build a 303 clone? I'm short on coding, however I have started begun researching "compatables" to replace the obsolete parts. After I can determine adequate and best replacements, then I'll start desiging a mainboard going straight from the TB-303 schematics. I've gotten some inspiration from ~ladyada's x0xb0x and ML-303, and Ultra 303's CPU replacement Project (for dead 303 CPUs). Told you I might be insane.

Any possibility of getting more in the future? I'd like to get some, but I am currently not in the market for any at this time. :'(