taximan

Hiya Rosch, I am also building a klee sequencer which will be able to drive it but I wanted something I could use on the pc (hence the 'midification' question) the mps is supposed to be part of a modular system but I think it would make a great synth if 'midified' (is that even a word I ask myself?). I guess I will have to keep on learning and reading and fathom it out. I have to admit that at 48 yrs old I can't figure out why did I start building electronics as a hobby?.....lol. cheers Paul

Hi all, Alongside the other twenty million projects I have under way (slight exaggeration) I am building a Thomas Henry MPS analogue unit,could someone please tell me what midibox unit(s) I would need to 'midify' it.if this is possible? cheers Paul

Two words 'fuckin awesome' cheers and good luck paul

Hiya Nils, My name is on the list (spares) but I thought it wise to add it here also,just one board please. cheers Paul

Hi all, Problem fixed,it seems that the 'loose' resistor was the source of the problem as the din board is working as intended now and the lcd display is fine......ta daaaaa! Right....now to start on the dout side of things.......where the heck did I put those leds? Oh yes, another thing that just sprung to mind is this,I made a bank-stick with 8 ic sockets and perf board but only had four chips to put in it but the memory would not hold any patches or format,so being the clumsy sod that I am I thought it was something to do with my lack of finesse and rebuilt the 'memory module'....no success. I decided to try the chips from my sid project and they worked with no problem at all,the only difference in the parts is as follows..........yes I know I know,I sorta thought to myself after rebuilding it why didn't I just test it with the meter.......funny things brains are....anyhow... 24LC512/ip uwb/0930 would not work at all,as though the core didn't recognize them. 24LC512/ip c8m/0949 worked straight away with no problems at all. Voltage at measured at pins @ 5.05 volts,so it's not a low voltage issue as I read someone else had. Mods if you want to move this post so that the bank-stick issue may help someone with problems please feel free. Cheers Paul

I have just found this stuff and will be ordering some for myself shortly to test it. http://store.curiousinventor.com/top-sellers/chip-quikr-surface-mount-desoldering-kit.html It seems like a great solution to de soldering smd's. This is not an aff link. (Mods,I wasn't sure whether to put this in here as smd de soldering seems to be a problem or in to the tips and tricks sec tion,please alter as you see fit). cheers Paul

I don't mind admitting that I found this useful http://www.dummies.com/how-to/content/electronics-for-dummies-cheat-sheet0.html cheers Paul

Hiya TK, I mounted everything as in the schematic (it all came as a kit anyhow,so I just kept soldering until I ran out of bits). I wasn't too keen on the 'tightness' of the tracks on the dinx4 board so I have attacked it with the dremmel leaving plenty of room around any possible shorts (while still leaving the tracks that need to be there,obviously) and it seems your advice is bang on the button,one of the resistors had pushed the track away from the underside of the board making the contact intermittent,I will be re connecting it all back up some time this week and hopefully the problem will be sorted. Thanks for your input. cheers Paul

Hiya Flemming, I have started stripping it down (again lol) disconnected ins/op select buttons 1 to 4,the ins/op select button and all of j5 and j6 on the din board......still erratic behavior from lcd....... disassemble..... disassemble....disassemble. cheers Paul

Hiya, This has me really puzzled but I am sure it is only a silly problem somewhere. MBFM boots up fine,shows 'launching cs' All functions work okay ...............but if I place my hand above the cs (not actually touching it) the display will flicker and sometimes change to different functions. Button 'select six' reacts consistently to putting my finger near it (not actually touching) if the lcd is in 'start mode' displaying 'ens/i/ptch/name/chn/audio' and I go near button 6 the screen changes to 'step/mode/#1/#2/#3/rate (flashing)/sync/cc#1' If I put my finger near it again (regardless of what is displaying) it will affect it. Gets better ......I press escape and go back to what I call the start screen (as detailed above). Then I place my hand above the cs above where the din board and led matrix are located in the case (again not actually touching anything) the display will change to inst/play/con/fdbk/prng/fine/port/susk...etc etc. now when I put my hand near it (the cs) the lcd functions select 1 through to select 5 flicker like crazy. I dont know if it's a dodgy capacitor or bad joint somewhere but I have rebuilt this thing three times now,so I am pretty sure the problem does not lie with the core or opl3 board. Its as though something is discharging through the casing,really weird stuff. EDIT If I disconnect the din and dout boards placing my hands near the button six causes no problems (no power going through obviously) so it suggests the problem is with the din side of things.(I tried it with just din board connected and the same problem manifests) END EDIT There is a funny side to it though, I have told the kids it is a telepathic machine I have invented with thought controlled display and they are like ''wow dad''....he he he. Any help,wild guesses or sympathetic piss taking is welcome. cheers Paul

Hiya, You might drop lucky and find it here....click on roland and scroll down to jx-3p. http://www.vintageplanet.nl good luck

Hiya, I stripped the wires from the keyboards and saved the caps lock key switch (at least I think it was the caps lock key),I also saved the best cases to use for projects. I looked at the going rates (on ebay) for the chips left on the c64 boards but they didn't seem to be selling for much. A guy in the fleamarket was enquiring about left over c64 bits,maybe he might buy them off you? Best of luck mate. cheers Paul

1 set here please I sourced a set from the flea market so please cancel my order. (I never pm'd you so I am probably not on the official order list anyhow) cheers Paul

I would like 2x gm5 chips please cheers Paul

Nice fiddly bits,this is the kind of stuff I like to get my head around although lately I have been giving the old glue gun some heavy use.......lazy I know. Looks like a good solid way of mounting the lcd btw,good tip. Paul

Kin ell !! I'm in switch heaven...lol. cheers Paul

Me likey....lots of possibilities with those switches...nice.

It won't work for me if I use chrome but it will with firefox (maybe a quicktime plug in issue that is browser related?) hope this helps cheers

Flemming, I put the pix here for you of where I am at right now. Regarding your mbfm...have you tried swearing a lot and kicking the dog? It might not get it working but you will feel a lot better...lol. just keep at it Flemming you will get it working I'm sure. cheers Paul PS I just realised the pix are shite....oh well

Hiya, Flemming and Nils...I was just having a bit of fun.......here's an excerpt from a pm I sent Flemming the other week "The commodore psu I have is really an amiga...okay I can live with that." Cheers Paul

If it says commodore on it and was advertised as a commodore it is a commodore....so sayeth the markings :)

I rest my 'case' your honour......lols...couldn't resist it Flemming...sorry mate.

Hiya, I am using an amiga/c64 psu (square plug) and have connected the 5v to J2 of the core and removed the voltage regulator and then bridged the two outside pads as suggested on ucapps,the psu is putting out 5.3 volts,is this too much? cheers Paul

Hiya Sean, I started out like yourself just wanting to buy a finished product or kit but ended up having to try and make it myself,I have fried a pic and screwed a pcb up but I am learning all the time and finding it very enjoyable.....which has surprised me as I thought the frustration factor would kick in and lead to a trail of electronic debris in my man cave. What I have found in the forum is that if something is in writing somewhere you are expected to find it and figure it out for yourself but genuine "I am stuck as fuck" type questions will bring help. What I would suggest is you do some kind of rough diagram explaining what it is you need and than folks will probably jump in and help you. I reckon you are at least going to need a core module,so why not start with that and add modules as it becomes clear what you want from the end product? As for if you should use a pic core or the new smt32 type core,what you are trying to achieve would dictate which you should use. Good tip.....don't listen to me,my soldering and electronic assembly skills are akin to teaching an elephant how to do embroidery. cheers Paul

Hiya, Will this do? http://cgi.ebay.com/TLV5630-DAC,-12-Bit-8-Channel-Voltage-output-IntRef--x2_W0QQitemZ180460648565QQcmdZViewItemQQimsxZ20100125?IMSfp=TL100125152009r14004#shId Around $10 delivered which I think is around six quid......might be worth a look for you. cheers Paul