[sdiy] CV/Gate delay project..

MTG grant at musictechnologiesgroup.com
Fri Jan 29 21:59:53 CET 2021


It is a big learning curve. Interesting to see things that are being 
replaced or replicated with the STM32 though. For example:

ARMSID - https://www.nobomi.cz/8bit/armsid/index_en.php

GB

On 1/29/2021 12:00 PM, Jean-Pierre Desrochers wrote:
>> If the best ADC you can find is $15, then replace the whole lot with a STM32H750 which is a really good 16 bits and processor and DACs all for $5-6.
> Mike,
> You are right on that, but to me it's gonna be a LONG learning curve to code that CPU
> Since I never used ST32 micros...
> All my last projects were C coded on Microchip stuff..
>
>
>
> -----Message d'origine-----
> De : Mike Bryant [mailto:mbryant at futurehorizons.com]
> Envoyé : 29 janvier 2021 14:45
> À : Brian Willoughby; Jean-Pierre Desrochers
> Cc : SYNTH DIY
> Objet : RE: [sdiy] CV/Gate delay project..
>
> If the best ADC you can find is $15, then replace the whole lot with a STM32H750 which is a really good 16 bits and processor and DACs all for $5-6.
>
> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Brian Willoughby
> Sent: 29 January 2021 19:33
> To: Jean-Pierre Desrochers
> Cc: SYNTH DIY
> Subject: Re: [sdiy] CV/Gate delay project..
>
> Try Mouser.com to quickly find chips based on parameters. I find it easier than Digikey.
>
> MAXIM is a good company, but I can't remember whether I've used their ADC in a project.
>
> I did not mention part numbers for the Texas Instruments ADC that I used, because I don't think you need 1 Msps rates. That chip has an 8-channel analog mux in front, so it's really only 125 kHz per channel.
>
> You might have to settle for 12-bit ADC. I have also worked with 14-bit where price/performance tradeoffs were necessary (but that was still a DAC, where bits are cheaper).
>
> I'll try to take a look after work today, and see if anything significantly less than $15 pops up from a reputable company.
>
> Brian Willoughby
>
>
> On Jan 29, 2021, at 11:18, Jean-Pierre Desrochers wrote:
>>> Don't look for shortcuts when it comes to CV. Get decent 16 bit ADC/DAC. They are dirt cheap now.
>>   
>> Any ADC chip suggestions ??
>> At Digikey, the cheapest 5v supply DIP 16bits ADC is Maxim’s
>> MX7705EPE+ at $15.09US each
>> 16 bits DAC’s are cheaper..
>>   
>> JP
>>   
>> De : Roman [mailto:modular at go2.pl]
>> Envoyé : 29 janvier 2021 13:48
>> À : 'SYNTH DIY'; Jean-Pierre Desrochers Objet : ODP: [sdiy] CV/Gate
>> delay project..
>>   
>> Don't look for shortcuts when it comes to CV. Get decent 16 bit ADC/DAC. They are dirt cheap now. And I mean decent, because many new 16bit converters have 13-bit linearity  and sometimes even only 10-bit.
>> Might be a challenge if you require THT though.
>>   
>> Roman
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org




More information about the Synth-diy mailing list