OLED I2C wiring
Most small I2C OLED displays use four wires: power, ground, SDA, and SCL. On an Uno, SDA is A4 and SCL is A5.
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OLED Display
By Admin, 05/07/2026 · 1 min read
OLED Display item guide for MakerAccess vending machine projects.
Item guide
OLED Display
This article explains how to use OLED Display in a MakerAccess project, with the key concepts, build route, and useful reference links.
Purpose
What it is for
OLED DisplayShows text, icons, readings, and menus in microcontroller builds.
Concepts
A circuit needs a closed path from power to ground. Breadboards and jumper wires let you test that path without soldering.
A microcontroller reads inputs such as buttons or sensors and drives outputs such as LEDs, displays, motors, or signals through code.
Build path
How to use it
Start small, test the fit or circuit, then combine it with the rest of the project.
1
Build one small circuit first, then add parts one at a time.
2
Connect ground first, then power, then signal wires.
3
Upload a simple sketch and test the part before combining it with a larger build.
Connection guide
Wiring maps for the first test
Use the visual map before adding extra modules, displays, motors, or code.
Project links
Useful links
Open the reference that matches your project route.
No external project link is needed for this item.
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