Re: DIY gonzo tactics
2007-01-28 by djbrow54
Thanks for the math. I was going to try and figure that out. The capacitors were a pain. I have to take this crystal off when my replacement supervisor chip
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Re: [ComputerVoltageSources] Re: DIY gonzo tactics
2007-01-28 by Eric Brombaugh
Nice soldering job - very tidy. I suppose that the real test of this modification would be how well two such systems track each other in real-time. Ceramic
Re: DIY gonzo tactics
2007-01-27 by djbrow54
Success! I know I posted last night. Perhaps someone got a private posting instead of to the group. I soldered some 0302 capacitors across the pads and a
Re: DIY gonzo tactics
2007-01-26 by djbrow54
Success! I had a tech at work take off the resonator. I added the capacitors (0302, I think) and a through-hole crystal. Man were those capacitors small!
Re: DIY gonzo tactics
2007-01-25 by Gary Chang
Dave, Tally ho on your mission! I hope that it is successful.... gary
Re: DIY gonzo tactics
2007-01-25 by djbrow54
I pulled my AtomPro28 tonight and replaced it with my spare. I blew the reset supervisor on this one so thought I would experiment with it. I ll take it to
Re: [ComputerVoltageSources] DIY gonzo tactics
2007-01-24 by Dave Manley
I ve found that applying liquid flux and then adding solder to smt parts will usually get them off pretty quickly. Get the part hot, keep the iron moving
DIY gonzo tactics
2007-01-24 by drmabuce
HI DAve ... i ll bet that that s a class of implement that would inspire tool-envy in even the most jaded DIYer heart.!!! ... LOL! Dremel... the universal
Re: Atompro timing anomolies....
2007-01-24 by Gary Chang
... In a pinch, relying on synchronization for dead-on accuracy can work - and it would solve the issue of retrofitting the clock in the Atompro - which seems
Re: Atompro timing anomolies....
2007-01-24 by djbrow54
Thanks for the compliment. I m more of an engineer (actually I m a manager) and less of a musician. I never record but mostly play and I don t have a great
Re: Atompro timing anomolies....
2007-01-24 by djbrow54
The resonator is reasonably sized compared to the other components and the landing pads are long enough that I think you could even solder discrete parts to
Re: Atompro timing anomolies....
2007-01-23 by Gary Chang
Incidentally, Dave, (and all of this list), I submit my comments regarding this project WITH ALL DUE RESPECT. I defer to your technical expertise. I have felt
Re: Atompro timing anomolies....
2007-01-23 by drmabuce
Hi Dave thanks for the exploration i took a look at processor pins 9&10 on my PSIM PCB and ... boy! you ain t a-kiddin about the not for the faint-of-heart !
Re: Atompro timing anomolies....
2007-01-23 by Gary Chang
... I do understand the limitations of the PSIM s processing capabilities regarding this syncing situation - I am just trying to sketch for you the extent that
Re: Atompro timing anomolies....
2007-01-23 by djbrow54
Yes, it looks like you can drive it that way. Taking the resonator off will not be for the faint of heart. Mine appears to be 3mm x 4mm with full landing
Re: [ComputerVoltageSources] Re: Atompro timing anomolies....
2007-01-23 by Samppa Tolvanen
... I hear, I hear. That´s for single AtomPro28 (24). But what I wanted was to run 4 or something from the same clock. The chip supports it, right? One xtal
Re: Atompro timing anomolies....
2007-01-23 by djbrow54
Actually, now that I look at my AtomPro28 photo in the photos section, I see they put a 1M resistor across the clock inputs. You probably want to remove that
Re: Atompro timing anomolies....
2007-01-23 by djbrow54
You just replace the resonator with a crystal and two 12 pF capacitors. I ve already replaced the power-on reset chip on my AtomPro28 and I m not ready yet to
Re: [ComputerVoltageSources] Re: Atompro timing anomolies....
2007-01-23 by Samppa Tolvanen
... HArry : ) !! I´d like to see the modification (a simple one, as it is) for xtal timebase for one-too many Atompros. This should resolve this timing
Re: Atompro timing anomolies....
2007-01-23 by djbrow54
I sort of follow this. Don t these devices phase-lock to the frequency of the pilot tone? The AtomPro doesn t have the processing capability nor the
Re: Atompro timing anomolies....
2007-01-21 by Gary Chang
Dave, You have mentioned measured degrees of error, asking what is acceptable. The film, video and music systems that I use (as others in the industry use)
Re: AtomPro timing anomalies
2007-01-21 by Gary Chang
David, This is not off the wall in the least - if we could use an off-the-shelf industry standard device to syncronize the PSIMs, then we would have a simple
Re: Atompro timing anomolies....
2007-01-20 by djbrow54
While running an errand, it dawned on me that rather than just synchronize the clocks, I could determine the error and adjust the timer to dial in the slave s
AtomPro timing anomalies
2007-01-20 by David Kronemyer
This might be completely off the wall, but would there be a way to synch it either to digital clock or to black burst? We have a Grass Valley sync/color bar
Re: Atompro timing anomolies....
2007-01-20 by drmabuce
Hi Eric Thanks for the info & analysis...very enlightening ... if the code is written with with sync implemented from the ground up it s less onerous- not easy
Re: Atompro timing anomolies....
2007-01-20 by djbrow54
I coded up two approaches to module synchronization. Alt 1: I setup the PSIM as the master clock using 1 mS timer interrupts. I sent a $fe midi active sense
Re: Atompro timing anomolies....
2007-01-20 by djbrow54
I would take a much simpler approach. You don t have to follow the MIDI standard. Whatever code I wrote would rely upon the timer for some standard timing
Re: [ComputerVoltageSources] Re: Atompro timing anomolies....
2007-01-19 by Eric Brombaugh
Neat idea. I agree that implementing a digital tracking PLL in the AtomPro code would be significant hassle. Probably the easiest hardware solution would be to
Re: Atompro timing anomolies....
2007-01-19 by drmabuce
Hi All External sync at the macro-level as described by Maestro Chang must be implemented at the application code level. i ,for one, don t relish the
Re: Atompro timing anomolies....
2007-01-17 by Gary Chang
Regardless of the accuracy of the timing source or the AtomPro (and its scientific accuracy), it is essential that an external sync reference can be used to
Re: Atompro timing anomolies....
2007-01-13 by Gary Chang
The Urei 960 digital metronome is more accurate than most computers that are running music software. In the case of music computers that aspire to be as
Re: Atompro timing anomolies....
2007-01-12 by bdhornback
Dave, Take a look at this: http://www.sparkfun.com/commerce/product_info.php?products_id=99# Yes, you could build one pretty cheap but this is plug n play and
Re: Atompro timing anomolies....
2007-01-12 by Gary Chang
... The only accurate metronomes were manufactured for the film industry by UREI - the 900 and 962 Digital Metronomes. They are the metronomes that every
Re: Atompro timing anomolies....
2007-01-11 by djbrow54
Tell me more about the timing requiremetns. In looking at metronomes, highly accurate is described as +/- 1%. The PSIM is better than that. In a 5 minute
Re: Atompro timing anomolies....
2007-01-11 by Gary Chang
... yes, three pings. At 1 minute 23.582 seconds, ... not bad for setting off explosives...8*) ... The length of Psim Madness is not long in terms of music
Re: Atompro timing anomolies....
2007-01-11 by djbrow54
Actually, I said 0.5%, not 5%. I opened the file Psim madness.mp3 in an editor and measured the delay. There are three pings, correct? At 1 minute 23.582
Re: Atompro timing anomolies....
2007-01-11 by djbrow54
You are right. Synchronizing the PSIMs will not improve the accuracy, it will only make all track together. If the overall accuracy is not good enough, an
Re: Atompro timing anomolies....
2007-01-10 by Gary Chang
Brice, If you listen to the mp3, you will note that 1). All three PSIMs start simultaneously and together, so there is no issue in the preliminary codes of
Re: Atompro timing anomolies....
2007-01-10 by Gary Chang
Dave, First off, thanks for the analysis - indeed, the phasing of the three PSIMs seems to coincide with the 5% error spec that you list in your note. Dave,
Re: Atompro timing anomolies....
2007-01-10 by djbrow54
The data sheet for the AtomPro24 specifies a 16 MHz resonator, not a crystal. Resonators are about 0.5% accurate, vs. a crystal that is measured in ppm. At
Re: [ComputerVoltageSources] Atompro timing anomolies....
2007-01-10 by Brice D. Hornback
Gary, The INIT routine in maf-lfo2.bas contains approximately 1.2 seconds of delay in a for/next loop to flash the LEDs on and off, and then another 100ms
Atompro timing anomolies....
2007-01-09 by Gary Chang
Being one of very few that has more than one of the PSIM-1 module, I did a little test to evaluate the relative timing accuracy of the PSIM S internal clock,
PSIM wanted
2006-12-27 by pow333us
I m still intereted in buying anyones completed or parts PSIM, or even their place in the remaining queue. Please contact me off list if you have one to get up
Re: [ComputerVoltageSources] Re: Sequencers
2006-12-21 by Brice D. Hornback
Hello everyone. I also designed the PSIM-1 so you can plug in a daughter board on top of the Atom-PRO (those are what the pins running along side the DIP
Re: Sequencers
2006-12-19 by djbrow54
Brice designed the PSIM board with a 40 pin socket for the AtomPro. If you remove the AtomPro24 and replace it with an AtomPro28, you get four additional pins.
Re: [ComputerVoltageSources] Re: Sequencers
2006-12-18 by John Mahoney
... Unless you use MIDI for Note In... ... Sure, use a 4-bit ADC. Or maybe the Blacet Analog Bar Graph could be modified for this. -- john
Re: [ComputerVoltageSources] Re: Sequencers
2006-12-18 by Andrew Scheidler
Moe - The AUX can be the Gate Out of course, but I must have one input & output for note quantization :) There must be some way to take *one* PSIM output and
Re: [ComputerVoltageSources] Re: Sequencers
2006-12-18 by Dave Bradley
Andrew, If the 4 psim outputs were set up to be a binary address, you could have complete specification of any arbitrary number between 0 and 15. Then set up
Re: [ComputerVoltageSources] Re: Sequencers
2006-12-18 by Doug Wellington
... Wouldn t you have to upgrade from the AtomPro24 to the AtomPro28 for that? Doug http://www.analognotes.com http://www.stoogepanels.com
Re: [ComputerVoltageSources] Re: Sequencers
2006-12-18 by Andrew Scheidler
Dave - Can the existing PSIM-1 have four more inputs added? Outputs too? Are there schematics or instructions for this somewhere? I have a soldering station