dcer10 Posted October 24, 2006 Report Share Posted October 24, 2006 Hi,As suggested by Moebius Im looking to start up a group buy for the shunt and the Max525 chips for the Aout boards. To begin with it looks like we will need 13 people wanting 2 525's each as a minimum. If people could express interest on this post and it looks like there will be at least that number of people with their money ready then we can take it further. Also I think it would make sense for whom ever will actually get the large order delivered to be situated somwhere with cheapish shipping for everyone {as best as we can arrange}. I am in Australia, which may not be the cheapest quickest place for shipping for others. I have noticed that shipping out of the USA seems a lot quicker and cheaper than shipping out of Europe, Germany in particular. Can anyone offer comments on any of this, or commit to a buy should we get an order ready? From Moebius's previous comments I think that your investment would be around $50 US in parts for the two chips and two shunts, but dont quote me on it, and the more people wanting to buy the cheaper it would get. All the best,John Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 24, 2006 Report Share Posted October 24, 2006 I'd be interested in this if we include the IC's for the SHX8 board... Quote Link to comment Share on other sites More sharing options...
moebius Posted October 24, 2006 Report Share Posted October 24, 2006 Well,The group buy idea was really suggested by someone called TK. Strangest things - like I've seen that nick before? (You can also see this in the AOUT parts list)Just for a support, I'm in for 2 MAX525s and the reference chips.The price breaks in maxim-ic's online shop aren't that good, really.stryd_one: Basicly the ICs used in SHX8 are obsolete. SHX8_LC is an option, but nobody has realized it yet.Moebius Quote Link to comment Share on other sites More sharing options...
Sebo Posted October 24, 2006 Report Share Posted October 24, 2006 Hi:I can't spend that money right now, but I think that this group buygonna take some time to arrange, so count me in. I'm in Argentina,South America.Sebo Quote Link to comment Share on other sites More sharing options...
stryd_one Posted October 25, 2006 Report Share Posted October 25, 2006 Just a thought guys...rather than busting chops to try and find parts which are expensive and obsolete, why not work on finding replacement IC's for a AOUTv2 and SHX8v2? Quote Link to comment Share on other sites More sharing options...
dcer10 Posted October 25, 2006 Author Report Share Posted October 25, 2006 Hiya stryd_one,That sounds like a top plan but is way out of my capability! I'd love to see it happen and will help in any way I can.All the best,John Quote Link to comment Share on other sites More sharing options...
bugfight Posted August 9, 2007 Report Share Posted August 9, 2007 saw this thread and this one for the aout pcbhttp://www.midibox.org/forum/index.php?topic=4884.0I understand these are old threads, but I would be very interested in bringing them back to life if others will join in...I realize the aout_ng is out soon, but I still want to build the hi res aout for controlling osc freq, etc. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted August 10, 2007 Report Share Posted August 10, 2007 The AOUT_NG is 8x12bit (8 gates), AOUT is 8x12bit (2 gates), the AOUT_LC board will do 8&8 or 12&4Still want the old module? ;) Quote Link to comment Share on other sites More sharing options...
lief138 Posted August 10, 2007 Report Share Posted August 10, 2007 I would be interested in participating in this initiative when the time comes. I have plans to build at least two of these so count me in for 2 of everything. Let me know if I could help in any other way. Quote Link to comment Share on other sites More sharing options...
Jaicen Posted August 10, 2007 Report Share Posted August 10, 2007 This is something i'd be interested in, but again, I'm unclear as to the logic behind using these chips. I assume it's because they provide a greater degree of accuracy, compared to the AOUT-LC?? Quote Link to comment Share on other sites More sharing options...
bugfight Posted August 10, 2007 Report Share Posted August 10, 2007 The AOUT_NG is 8x12bit (8 gates), AOUT is 8x12bit (2 gates), the AOUT_LC board will do 8&8 or 12&4Still want the old module? ;)I definitely will be building some aout_ng as well, it will be perfect for the sid, for example.But as I understand it, aout_ng replaces the aout_lc, not aout v1.also, any dout pin can be a gate, right?this is from the aout_ng thread:Hi Thorsten,yes, I also noticed that this afternoon, and it gave me a bit of a headache. Actually, if my calculator doesn´t lie, +/-6 LSB is around 15 mV? if full scale is 10.67 V (1V/Oct) then 2 LSB is 5.2 mV and 6 LSB would be 15.6 mV. 1 Semitone is 83.4 mV, so 2 LSB is already more than 6 cents detune and 6 LSB is inacceptable!! Still an error of 6 LSB is even better than an 8 bit DAC... I wasn´t aware that CV is so receptible to tuning errors and you can´t get a single clean interval off an 8 bit CV system.Even though the curve in the datasheet shows "only" INL of around +2/-1 LSB I´d still say this DAC would be noticeably inferior to the max525.<snip>Seppoman Quote Link to comment Share on other sites More sharing options...
nebula Posted August 10, 2007 Report Share Posted August 10, 2007 I definitely need high-quality CV outputs for both 1V/oct and Hz/V. I've procrastinated for a long time, so I think I'm going to wait for AOUT-NG, try it out, and even if it's not accurate enough, it will still make a great AOUT for everything except tuned oscillators. Then I'd be interested in a group order on MAX525.In the meantime, I have searched my limited sources for good deals, and it's DRY. Still looking though... Quote Link to comment Share on other sites More sharing options...
stryd_one Posted August 10, 2007 Report Share Posted August 10, 2007 Hey seppo what kind of deviation did you measure in real life? Quote Link to comment Share on other sites More sharing options...
seppoman Posted August 11, 2007 Report Share Posted August 11, 2007 Hi guys,this thread is Ooold and was about the MAX525 Aout, so I´d rather not do a full detailed discussion of the pros and cons of different Aouts here. I´ll write an answer in the New AOUT thread.I´m not sure how much more testing I can do with my limited equipment though.Seppoman Quote Link to comment Share on other sites More sharing options...
suital Posted September 9, 2007 Report Share Posted September 9, 2007 ... Quote Link to comment Share on other sites More sharing options...
lief138 Posted September 9, 2007 Report Share Posted September 9, 2007 Hey People, I'm just going to put this out there. I ordered samples of the 525 chip (X2) from Maxim. The online sample cart told me I could only order 1 but I hit submit anyways and it said I would need managers approval. I did not hear anything back for about a week , but then the parts showed up. So it is possible to get two samples. I double checked with folks here and I did get the correct parts.... Just FYILief Quote Link to comment Share on other sites More sharing options...
bugfight Posted September 9, 2007 Report Share Posted September 9, 2007 speaking of parts, i just test fit the multi-turn trim pots from the reichelt order list.i think this is known but just as a reminder, the 3/8" (10mm) pots are too wide.you need the 1/4" (more expensive) pots for the v1 brd. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted September 10, 2007 Report Share Posted September 10, 2007 Don't forget the shunt lief :( Quote Link to comment Share on other sites More sharing options...
lief138 Posted September 10, 2007 Report Share Posted September 10, 2007 Don't forget the shunt lief :(Oh Yeah, I failed to mention that, I ordered it up with my samples, but I am pretty sure I ordered the wrong part (this wouldnt be the first time, ask Jimp he knows ;)...) I got part # MAX6007BEUR+, ( I think the EUR+ is where i went wrong :)) unfortunatly it is sooo small it looks like it should be in a cell phone or maybe a spy cam or something. I will be trying again with the sample once I figure out a larger sized part to order.... (any feedback would be great folks) :)Lief Quote Link to comment Share on other sites More sharing options...
lief138 Posted September 10, 2007 Report Share Posted September 10, 2007 I got part # MAX6007BEUR+, ( I think the EUR+ is where i went wrong :)) unfortunatly it is sooo small it looks like it should be in a cell phone or maybe a spy cam or something. I will be trying again with the sample once I figure out a larger sized part to order.... (any feedback would be great folks) err...the website says The MAX6006-MAX6009 ultra-low-power shunt references are ideal for space-critical and low-power applications. They are offered in 3-pin SOT23 packages,...SOT23 being the magic number then perhaps I didnt get the wrong part then.. damn this is small... Am I missing something?Lief Quote Link to comment Share on other sites More sharing options...
bugfight Posted September 10, 2007 Report Share Posted September 10, 2007 ... I got part # MAX6007BEUR+, ...size is fine, but "The A grade features a temperature coefficient of 30ppm/°C over the extended temperature range of -40°C to +85°C, with an initial accuracy of 0.2%. Grade B features a temperature coefficient of 75ppm/°C with an initial accuracy of 0.5%."so b is a bit less accurate.prolly doesn't matter since we gots the trim pots... Quote Link to comment Share on other sites More sharing options...
lief138 Posted September 10, 2007 Report Share Posted September 10, 2007 Thanks Jimp, Well no harm in trying, Ill see if I cant get myself an 'A' version...Thanks, Lief Quote Link to comment Share on other sites More sharing options...
suital Posted September 18, 2007 Report Share Posted September 18, 2007 i still have some max525 and shunts. if anybody wants to have some write me a pm. Quote Link to comment Share on other sites More sharing options...
Sebo Posted November 20, 2007 Report Share Posted November 20, 2007 suital:Do you still have some MAX525?Thanks Quote Link to comment Share on other sites More sharing options...
b-funk Posted November 20, 2007 Report Share Posted November 20, 2007 @sebopm me if you still need max525best wishes,tobias Quote Link to comment Share on other sites More sharing options...
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