Nurdspace eurorack raspberry pi hat: Difference between revisions

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|Category=Electronics,Eurorack
|Category=Electronics,Eurorack
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=== specifications ===
The title says it all.
The title says it all.


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* <s>based on</s>inspired on https://micro-twin.com/hardware.php
* <s>based on</s>inspired on https://micro-twin.com/hardware.php


=== schematics ===
=== schematics ===
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* PDF of revision 001: [[File:001.pdf]]
* PDF of revision 001: [[File:001.pdf]]


=== 0...3.3V to -5/+5V ===
=== 0...3.3V to -5/+5V ===
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[[File:Circuit-20220715-2051.png|640px]]
[[File:Circuit-20220715-2051.png|640px]]


=== -5/+5V to 0...3.3V ===
=== -5/+5V to 0...3.3V ===

Revision as of 21:32, 15 July 2022

Eurocrack-hat
Nurd-euro-pi.jpg
Participants
Skills Electronics, Programming
Status Active
Niche Music
Purpose Fun
Tool No
Location
Cost
Tool category Electronics,Eurorack

Eurocrack-hat

Nurd-euro-pi.jpg {{#if:No | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:No | [[Tool Cost::{{{Cost}}} | }}


specifications

The title says it all.

First version has:

  • 2x analogue in (10 bit resolution)
  • 2x analogue out (12 bit resolution)
  • 2x gate in


schematics


0...3.3V to -5/+5V

falstad circuitjs simulation

The opamp needs +5 and -5 for power.

calculated with https://masteringelectronicsdesign.com/differential-amplifier-calculator-2/

Circuit-20220715-2051.png


-5/+5V to 0...3.3V

falstad circuitjs simulation

The opamp needs +3.3V and 0V for power.

Circuit-20220709-1750.png


software

  • I've chosen a DAC and ADC with SPI to easily connect them to a raspberry pi.
  • gate signals can be toggled via e.g. wiringpi