Re: Front Panel
2006-03-23 by mate_stubb
Build it and they will come. For large pot fields it is impossible to maintain the pure MOTM standard of 1 knob per 1 rack unit horizontally. I ve done
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Re: Front Panel
2006-03-23 by Grant Richter
... Then they can do their own layout, huh. Even using 8 knobs vertical, there are 18 1/4 connectors.
Re: Front Panel
2006-03-23 by data2action
oh yeah, midi too. At least some MOTM owners are concerned w/ consistency of panel layout (not me, i m just sayin ... I ve read some objections to other
Re: LCD support - feature creature WARNING
2006-03-23 by djbrow54
Absolutely. I would not dedicate any buttons to the LCD. In fact, Run, Stop, and Aux are kind of meaningless. I can think of only 1 program I ve written
Re: Front Panel
2006-03-23 by microtonalsynthesis
Check the Lumex LCD spec in the links section. John
Re: Front Panel
2006-03-23 by Larry T.
Based on all the back and forth the following seem to be missing: 9 pin RS-232 5 pin MIDI in 5 pin MIDI out The following seem to belong on another panel
Re: [ComputerVoltageSources] Re: Front Panel
2006-03-23 by Norman Fay
OK, I just uploaded a blank panel .fpd file, 4 panel widths wide, IE 12 wide, 5.25 high, with screw holes 1.5 apart, 0.3 from the top and bottom. I think
Re: Front Panel
2006-03-23 by mate_stubb
I ve been busy settling into a new job, but I can take a crack at a panel (in MOTM format anyway) after I get back from AHMW if people would like me to. Moe
Re: Front Panel
2006-03-23 by data2action
Norm, Also, I think, an RS-232 connector for the serial cable? I created a folder in the files section for front panel designs. I m gonna take a shot at it,
Re: [ComputerVoltageSources] Re: Front Panel
2006-03-23 by Norman Fay
OK, I plan on laying it out as follows: 8 g.p. uncalibrated input jacks 8 1v/oct calibrated input jacks 8 offset pots 8 attenuator pots in horizontal rows on
Re: LCD support - feature creature WARNING
2006-03-23 by Grant Richter
Works for me. When the unit is stopped, the knobs can be mapped differently than when in the Run mode.
Re: Front Panel...cursor
2006-03-23 by drmabuce
Hi Grant ... the latest discussion i ve seen precludes dedicated input controls for the LCD. refer to messages 251 & 253 for proposals of alternatives -doc
DOH! v.2.0
2006-03-23 by drmabuce
(sorry about the first misfire folks... guess i should put some TEXt in these messages) damn.... punked again! i guess i m genuine ly overanxious
DOH!
2006-03-23 by drmabuce
... chip ... harrybissell ... are not
Re: Front Panel
2006-03-23 by Grant Richter
Reset Pushbutton Run Pushbutton, Run LED, Run input jack Stop Pushbutton, Stop LED, Stop input jack 8 general purpose uncalibrated CV input jacks 1 to 8 1 volt
Re: [ComputerVoltageSources] Front Panel
2006-03-23 by Norman Fay
Having designed a few frac format schaeffer panels for Oakley PCBs that I m pleased w/, I fancy having a try at this in frac format? (unless Mr Firman is
Re: champing at the OT
2006-03-23 by Grant Richter
Some bodies with a real jobs will have to cough up for a board run... Not joking.
Re: [ComputerVoltageSources] Re: champing at the OT
2006-03-23 by harrybissell
oh... so sorry I guess you aren t civic minded after all :^P H^) harry (yes joking :^)
RE: [ComputerVoltageSources] Re: champing at the bit
2006-03-23 by John Loffink
No problem. $3000 divided by 100 programmed parts is only a $30 per chip surcharge. :-) We re only joking here folks... John Loffink The Microtonal Synthesis
Re: [ComputerVoltageSources] Re: champing at the bit
2006-03-23 by harrybissell
wow that s a mighty generous contribution on your part... you sure are civic minded... :^P H^) harry (playful tonight :^)
RE: [ComputerVoltageSources] Re: champing at the bit
2006-03-23 by John Loffink
Gang Programmers that support Atmel AVR series exist, but they are not cheap - several thousand $$$ from what I ve found so far. John Loffink The Microtonal
Front Panel
2006-03-23 by djbrow54
Anyone started to design / conceptualize what a front panel for this might be with all the controls, jacks, & LCD? I m starting to wonder how large it will
RE: [ComputerVoltageSources] Re: Finalizing schematics
2006-03-23 by John Loffink
... Agreed about I2C. Let s leave it for expansion. John Loffink The Microtonal Synthesis Web Site http://www.microtonal-synthesis.com The Wavemakers
Re: Finalizing schematics
2006-03-22 by drmabuce
Hi Dave ... yes... the Offset knob will allow you to lift the floor of your LFO output from -5v to 0V, then you just tweak the range/scale knob for best
Re: Finalizing schematics
2006-03-22 by djbrow54
... Can someone explain the current thinking on the input level and offset? Will this allow me to drive the analog inputs with +/- 5 volt signals? Modulating
Re: A trick to read the input pots as 16 voltage values
2006-03-22 by djbrow54
I have always wanted to write a sequencer and was thinking of converting my AVR synth to a sequencer. With the display and internal quantization, this would
Re: [ComputerVoltageSources] A trick to read the input pots as 16 voltage values
2006-03-22 by Henry Till
I second this motion...why not add a couple parts for sequencer functionality? That would be really useful. Does anyone have any compelling reasons why not
Re: champing at the bit
2006-03-22 by data2action
I think the strong preference is for common parts, but if there s something critical that s difficult to source in one-off quantity (or if there s a
Re: [ComputerVoltageSources] A trick to read the input pots as 16 voltage values
2006-03-22 by Harry Bissell Jr
It does sound interesting and prlly does not add much circuitry. why not include the idea. If the board gets to be impossible we can discuss it then... H^)
Re: [ComputerVoltageSources] Finalizing schematics
2006-03-22 by Eric Brombaugh
Unfortunately I2C protocol is a bit more complex than SPI, so you can t use something as simple as the 74HC595 shift register for it. However, Maxim makes the
A trick to read the input pots as 16 voltage values
2006-03-22 by Grant Richter
I was thinking about the full configuration using 16 potentiometers. 8 input presets and 8 input attenuators. That would be enought to make a nice sequencer if
Finalizing schematics
2006-03-22 by Grant Richter
We are just finalizing schematics. I sent Harry some crude pencil drawings of a starting point. He is going to massage them to his liking. Current plan is to
Re: champing at the bit
2006-03-22 by djbrow54
I ve never seen a bulk burner for these. I figured I d just add a zif socket to my STK500 and program a bunch. They program fast. I m not interested in
RE: [ComputerVoltageSources] champing at the bit
2006-03-22 by John Loffink
All of the LCD Support PCB assembly parts are available from Digi-Key or Mouser, with one exception. You ll need a programmed Atmel Attiny2313 processor to
champing at the bit
2006-03-21 by drmabuce
Are there any ICs or semiconductors in the plan for the PCBs that are not commonly stocked at Allied/Mouser/DigiKey/Jameco? If lead times are involved we might
LCD Support PCB update
2006-03-19 by John Loffink
Dave sent me a schematic earlier this week that is 98% complete. I m converting that to my own CAD system and am almost done. I started a rough PC board
Where we are at now.
2006-03-18 by Grant Richter
All of this is determined by the workload the heroic Harry Bissel will bear, without turning into a bear. Right now we have: Power connector 2 x poly fuses 2 x
RE: [ComputerVoltageSources] real estate , the story so far
2006-03-18 by John Loffink
Doc, That looks comprehensive up until recent discussions where Grant mentioned 8 Analog Ins and 8 Analog Outs. It s great if the board can support that many.
Re: Noise Maker
2006-03-17 by Mike Marsh
Actually, the Speakjet has noise and you can get primitive synthesis out of it, too. ... could be a truely stand ... maker chip or ... Maybe a frequency
Re: Update from Nathan at Basic Micro
2006-03-17 by Mike Marsh
Personally, I d rather have the 8 I/O than Speakjet on board. I can hook my Speakjet to my PSIM if I really needed it... Mike ... accept either 24 or 28 ...
Re: LCD support - feature creature WARNING
2006-03-17 by Mike Marsh
I agree, and I think that the LCD would be very helpful when INPUTing data, as has been mentioned...it s an option that I would add. I also like the idea of
Re: [ComputerVoltageSources] Noise Maker
2006-03-17 by Eric Brombaugh
Whoops - missed the last thought on serially programmable frequency generators. That s a good one. I have used an Analog Devices AD9851 DDS in a PIC-based
Re: [ComputerVoltageSources] Noise Maker
2006-03-17 by Eric Brombaugh
You mean something like these: http://www.okisemi.com/english/ml2870.htm http://www.necel.com/mobile/melody/en/product/pd9971.html and many others. The trouble
Re: Power Supply Voltage
2006-03-17 by Grant Richter
Don t forget Serge. No problem if you rerstrict the input and ouput range to 5 volts. The DACs require the max output voltage be 4 volts less than the V+
Re: Power Supply Voltage
2006-03-17 by Julian
... All the european modulars (analogue systems, doepfer, analogue solutions, etc) I think it would be very short sighted to exclude these. Julian (and, yes,
Re: Update from Nathan at Basic Micro
2006-03-17 by Gary Chang
... Or would we rather have 8 analog inputs and 8 analog outputs? ... i agree with Henry.... gc
Re: [ComputerVoltageSources] op amps for your consideration
2006-03-17 by harrybissell
There is also the TL06x family for the low power buffs out there... The TL07x works for me... but if we stick to the familiar TL072 (8 pin) and TL074 (14 pin)
op amps for your consideration
2006-03-17 by john mahoney
Grant raised the subject of op amps. I am aware that the TL0xx (TL072, etc.) are the default op amp of choice in the synth DIY world, and not without good
RE: [ComputerVoltageSources] Update from Nathan at Basic Micro
2006-03-17 by Andrew Scheidler
And another. The Speakjet does make interesting noises, but I would be *far* more interested in additional I/O Andrew ... One more vote for more I/O, and no
RE: [ComputerVoltageSources] Update from Nathan at Basic Micro
2006-03-17 by John Loffink
One more vote for more I/O, and no Speakjet. I had my fling with speech synthesis 25 years ago with an addon to the TI 99/4A computer. Ultimately the pitch