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•Created by JeremyCook on 12/10/2024 in #🟩-pcb-and-analog
How to Implement Scrolling Display for MIDI Inputs on Arduino Opta with SSD1306 OLED?
The MIDI spec in the diagram you're referencing shows a buffer in the "Thru" circuit as a non-optional element, unlike the output circuit where it's marked optional. However, you can likely leave it out, as many MIDI circuits function without explicit buffers if signal degradation isn't an issue.
An ATtiny85 can act as a buffer depending on how it's configured. It has enough GPIO pins to handle basic MIDI input and output, and if you're adding an OLED display, you can manage the signal processing and pass-thru functionality with some clever coding.
In short: skipping the buffer should be fine for most setups, but if you notice signal issues, consider adding it later. The ATtiny85 could act as a buffer with the right setup.
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