I2C peripherals based on Attiny85 (mostly)

making noise over I2C, or send IR remotes or get an external controller, just stuff that is only helping if you don't have spare pins left

davedarko

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Description

I want more peripherals on my Lameboy project! So I build stuff. Soundcard will probably end up on the Lameboy 4 revision. There are a lot of chips out there, that already have an I2C connection. There might be things like sending IR etc, where it makes sense to have an attiny do it, after you tell it what to send.

Details

inspired by https://learn.adafruit.com/trinket-audio-player/sound-playback I want to explore the possibilty of having an I2C based tone generator. Basically like the SID in a C64 but controlled via I2C. Since I have no hardware with me on my vacation, I am only able to design some PCBs.

This project has a grove I2C plug to easily connect to my #LAMEBOY - another ESP12 handheld

I want to send some IR things, so why not make a board that has IR connected and can be controlled over I2C. https://z3t0.github.io/Arduino-IRremote/

Also to test my Game Boy Pocket button+silicone pad recycling idea, I've created a tiny controller board + case. See here for more details: https://hackaday.io/project/26823-lameboy-another-esp12-handheld/log/69994-external-gamepad

BlinkM is also cool, at least they were cool before WS2812Bs were cool. RGB LEDs controlled over I2C, I already use a BlinkM clone called Ghetto Pixel on Lameboy. Google for cyz_rgb to get the firmware ;)

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aisler boards are here
davedarko • 11/14/2017 at 21:47 • 4 comments

Boards are here and although they have some mouse bites, they do fit nicely :) Already soldered one up and it works nicely! Now I only need to write an 8 player game to fully make use of them :D
starting point for I2C sound card
davedarko • 10/26/2017 at 21:43 • 0 comments

After posting, let me quickly remove the SID part and hope no one ever saw it :D Here are some basic samples that are pretty promising, 4 triangle voices on one input, hopefully combinable with I2C. Sounds nice :)

http://www.technoblogy.com/show?QVN

http://www.technoblogy.com/show?Q7H

http://www.technoblogy.com/show?1G29
some attiny dev boards
davedarko • 09/27/2017 at 16:05 • 9 comments

corrected the grove connector
also, for programming and prototyping: