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 Forum index » DIY Hardware and Software » Arduino
MIDI 2 CV recommendations?
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MapacheRaper



Joined: Feb 15, 2018
Posts: 90
Location: Spain

PostPosted: Thu Sep 13, 2018 1:51 am    Post subject: MIDI 2 CV recommendations? Reply with quote  Mark this post and the followings unread

Hi,

I have an arduino nano and 2 MCP4752 boards. I would like to build a MIDI to CV module for eurorack. Ideally 2 channels with 2 gates, but I will try 1 cv 1 gate first on the breadboard.

If someone has suggestions Im all ears.

Thanks!
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cslammy



Joined: Apr 27, 2018
Posts: 50
Location: USA

PostPosted: Sun Sep 23, 2018 12:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's something to get you started using ATTINY.

https://janostman.wordpress.com/cheap-diy-usb-midi-to-cv-interface/

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MapacheRaper



Joined: Feb 15, 2018
Posts: 90
Location: Spain

PostPosted: Sun Sep 23, 2018 9:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yeah, that looks economical and easy. I love it.

It has 8 bits of reso, thought, that could be a bit too little, maybe. Is there any way to get more resolution? Interfacing it with the MCP4752 would be spot on, but I guess I would have to modify the circuit and the code, isn´t?

Anyway Im triying this for sure. Thanks!!
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cslammy



Joined: Apr 27, 2018
Posts: 50
Location: USA

PostPosted: Mon Sep 24, 2018 6:59 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes you'd have to modify the code to get more resolution, but if I'm reading this correctly dspsynth.eu has hacked 8 bit to work.

You'd need to check into the "BroHogan" tinywire library for ATTINY for starters I'd guess. That should allow I2C calls to something like the MCP4725 D/A.

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MapacheRaper



Joined: Feb 15, 2018
Posts: 90
Location: Spain

PostPosted: Fri Oct 19, 2018 4:13 am    Post subject: Reply with quote  Mark this post and the followings unread

I have 2 of these. Im trying the same 8bit design of janostman, and Im almost there, but when compiling the code i get

'TCCR1' was not declared in this scope

Which seems related to some library or maybe the micronucleous programmer that Im not sure if I have installed correctly.

Anyone knows how to program it?
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