this post was submitted on 21 Jun 2023
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AVR

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This is an UNOFFICIAL AVR community.

This is a community for people who use AVR microcontrollers. This can include Arduinos, Arduino clones, Arduino like boards, and stand alone AVR chips and self-designed boards.

NOTE: If your circuit is doing something weird when you touch a wire or move your hand across it see this pinned post.

This is a community for everyone who is interested in AVRs and Arduinos from beginners to experts, kids to adults, hobbyists to engineers.

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Great to find an AVR community here! Let's get some good content going. I used to work on some homebrew AVR-based projects (not Arduino, raw atmel ASM/winavr-gcc). I am reviving one project slowly...

Currently enjoying learning KiCAD, to move away from EagleCAD.

Anyone else working on MIDI-related projects?

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[–] dragontamer@lemmy.world 0 points 1 year ago (1 children)

Electronic musicians, representing the EE crowd! I'm not a musician though, so no MIDI project from me, lol.

What generation of AVR have you been using? The AVR DA/DB/DD and EA chips are new and exciting to me.

[–] Arghblarg@lemmy.ca 0 points 1 year ago* (last edited 1 year ago) (1 children)

Honestly, I have just gotten back to it after a few years... the projects I am resuming were atmega8, but now I want to try the 88a, as it uses way less current and it looks like I can run at 4-8mhz on just MIDI bus power, yay no battery!

I will look into the families you mention, I am waaay out of date :)

[–] dragontamer@lemmy.world 1 points 1 year ago

For MIDI... I'm thinking AVR DB is the best of the new chips.

  1. 3x Rail to Rail op-amps, the signature of the AVR DB.

  2. Multi-voltage I/O -- Port C runs on a second power supply, meaning you can mix 3.3V (main power, for portA, PortD, etc. etc.) and then 5V on PortC. Basically an integrated level-shifter.

  3. Full 24MHz speed at 1.8V -- No more looking at charts to figure out what speed you can go. 24MHz is always available (true on all DA / DB / DD and EA chips).

  4. 10-bit DAC -- You'll probably need to use one OpAmp to make this DAC usable as an output, but hey, its an option.