moebius

Hi bosone, That's a standard method if you have center tapped transformer and don't have to power "too many" (no such thing ;)) analog synth modules. Bye, Moebius

Hi, I GUESS that latest JSynthLib should work "out of the box" in Mac OSX. Bye, Moebius

Hi, There are virtually 10s of thousands YMF262s and YAC512s sitting in surplus stocks - And somehow I guess that nobody _really_ needs them ;) Buying a nice bulk of those would leave old soundcards untouched for the best duty ever - As practice targets at shotgun shooting range ;D Bye, Moebius

Hi, You can also buy a pre-programmed PIC. Then you wouldn't need JDM module - It's only used once (per core) to burn the bootloader to the PIC - and MIOS and applications are uploaded (and upgraded) using midi. Bye, Moebius

Hmm.. I think best bet here is to use a charge pump voltage converter - at least Linear Technology LTC1144 and Microchip TC7662A are compatible with voltage ranges needed. Bye, Moebius

Hi, I guess your out of luck here.. GP buttons are assigned "shift register wide", so you can't use individual pins for those. Another wire mess coming.. By reading the code, GP buttons are also handled quite differently from other buttons.. but I didn't see anything that prohibits modifying GP button handler code to support individually assigned pins.. or is there??! Gurus? So it's up to you, do you want to start modifying asm code or cutting traces and soldering jumper wires.. Bye, Moebius

Strange.. Can't you make Miss Parker as a DX plug (or whatever you like), then? Oh, those CAN be controlled with midi these days.. Nah, Sorry. Can't control parameters be handled with midi messages, with only different HW interface handlers (USB vs. MIDI UART) compiled in? Bye, Moebius

No, No we don't: http://www.midibox.org/cgi-bin/yabb/YaBB.cgi?board=troubleshooting;action=display;num=1088544230 220ohm resistor, few whatever - well, big enough caps... right wiring, and Gods will.. your done. If not, try again -I mean detecting the chip :D Bye, Moebius

Hi, Well, nobody knows yet ;) First, we don't know yet how many people are wanting to participate in this bulk order, splitting the costs of shipping ect. An the big unknown: It dependents very much on what Customs duty is going to be. Packets between EU countries are duty free and shipping should be pretty cheap.. Bye, Moebius

Smash - a good idea ;) I don't REALLY know a thing about customs handling between the US and EU countries - but I guess, direct orders from Mouser (even by individuals) will be handled as they were for commercial usage, unlike (DIY electronic kits maker) PAiAs - (from:http://www.paia.com/cat.htm#ordering). I don't know if this really matters - but maybe a middleman in the US could save us europeans from UNFAIR customs handling, even with a bulk order - we are hobbyist afterall. Â ;D Bye, Moebius

Hi, Illogik: Let's make this "European NJU7304D bulk order" topic ;) I'll PM you later. Maybe that's because Mouser is stocking the last ones (of this DISCONTINUED part) in the Whole World?? (mantra: IamnotgonnasayanythingIamnot...) Bye, Moebius

It's already handled by DIN circuit.. Bye, Moebius

Hi, KS0066 is HD44780 "compatible" and _should_ work with standard MIOS driver. ::) Sooo, check once again your LCD <-> core wiring against LCD datasheet and core schematics. Bye, Moebius

Hey, there are PCB foil patterns on the article - I can etch my own boards ;) And now - as I checked thru my component boxes, I found out that besides of having pic, I also have SRAM needed and compatible DAC (although dac is SMD one - got to do an adapter) Grr- the hardest part is getting the pic programmed.. So, lets see, Moebius

Hi, You can always try ;) Preparation: do a recording from the sounds on the expansion rom, you will need it later. Then you really need to dump EPROM contents to binary file. (Wanna DIY suitable programmer: http://w1.859.telia.com/~u85920178/ -> projects -> EPROM circuits). Or maybe somebody can do ROM dumping for you? Ok, my suggestion is using Awave (http://www.fmjsoft.com/awframe.html - I'm assuming using unregistered version here) to analyse, what ROM dump really contains. For unknown file formats Awave opens a window where you can set parameters for the file - With an trial and error, you should be able to discover the right format, hopefully ;) Then listening to the dump, you should find out where different sounds are located, mark start and end points - check the correct playback rate, comparing sounds on the dump to those in the recording made earlier. Your replacement sounds need to be prepared: Resampled to match sample rate of the sounds on the dump, cut to exact same length ect. - one in a time in unregistered version. Then you can just save those sounds on right format, and keeping track of the right sequence - and finally you can create your own ROM, by chaining all those together for example with DOS copy command (binary mode). Audit THAT file on Awave. If it sounds kind of similar like original dump, and it's on same format, length, there are good changes that you have succeed. This file is then ready to be burned (of course as binary) in EPROM.. and hopefully it sounds, well, right ;) Easy isn't it? Bye, Moebius (p.s. I also assumed, that ROM dump isn't in non-standard format and it doesn't contain additional data, like loop points, ect.)

Maybe where you live has as comprehensive library system as we Finns do - I went to the library, waited 5 minutes, as magazine was searched from the archive, and then photocopied the article ;) Bye, Moebius

:-[ Diode voltage drop.. feels ashamed... :'( Bangs head to the wall..

Whoops.. I forgot that 74HCT595 outputs can sink or source max. +/- 35mA current. So with those normal 220ohm resistors on DOUT: U/R=I, 5/220 ~22,7mA, You have only about 12,7mA Â more to spend. That means about 393ohm (I think you can use 390ohm) current limiting resistors for additional leds. Bye, Moebius

I think this is in a pre-preview stage.. TK's just showing that he can control the chip and get the sound out. Those original FM synths had as intuitive user interface as FM programming was, to the musicians ;) (Maybe math professors did like it? ;D) TK: If TK reads this: Maybe 2x40 LCD + "Soft key" (8?) + encoders concept (8?) for main parameter editing with various default screen setups for different parameter groups? (And possibility to fast reassign of any encoder to any parameter) Bye, Moebius

Hi, Check: http://www.albs.de/ Bye, Moebius

AArgh! ;D I just meant duplicating that part of the matrix, you want to. But not powering those directry from DOUTs connector, but taking signal out before resistor on DOUT board -> running that signal thru another (220ohm) resistor for those "paraller" leds. And for brighter leds, you need more current running thru it, so you put in smaller resistor. Try: http://www.mhsoft.nl/LedResCalc.html Bye, Moebius

no no. Inverter was already placed there in the laptop - so why change that ;) Bye, Moebius

Hi. As leds shouldn't be connected parallel without own current limitting resistors - I would recommend just wiring connection from DOUT board before the current limiting resistor there, and using another resistor on that connection to the parallel leds. And buttons are normally open type, so putting those parallel works. Bye, Moebius

Sorry, this don't work as el cheapo midi delay ;) It's just standard midi receiver followed by buffer to drive outputs: latency = propagation delay is under 100uS, and it's nothing compared to the slowness of midi itself. Bye, Moebius

Hi, This isn't CRT ;D, no problems with picture whatsoever ;) Well, a friend of mine is working on his own DIY converter - his display is from an old laptop, and guess what, inverter is actually attached to the backside of the display. Bye, Moebius