Transparent Graphical OLED Breakout Hookup Guide

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Contributors: Liquid Soulder, Ell C
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Hardware Overview

Let's check out some of the characteristics of the Qwiic we're dealing with, so we know what to expect out of the board.

CharacteristicRange
Operating Voltage1.65V-3.3V
Supply Current400 mA
I2C Addresses0x3C (Default), 0x3D

Graphical Display

The graphical display is where all the fun stuff happens. The glass itself measures 42mm x 27.16mm, with a pixel display that is 35.5 x 18mm. It houses 128x64 pixels, 128x56 of which are transparent.

Display Screen

Graphical Display

Qwiic Connectors

There are two Qwiic connectors on the board such that you can daisy-chain the boards should you choose to do so. If you're unfamiliar with our Qwiic system, head on over to our Qwiic page to see the advantages!

Qwiic Connectors

Qwiic Connectors

GPIO Pins

When you look at the GPIO pins, you'll notice that the labels are different from one side to the other. One side is labeled for I2C, the other side is labeled for SPI.


I2C Labels SPI Labels

Power LED

This bad boy will light up when the board is powered up correctly.

Power LED

Power LED

You can disable the power LED by cutting the LED jumpers on the back of the board.

Power LED Jumpers

Power LED Jumpers

JPX Jumpers

The JPX jumpers are used to either change the I2C address or configure the board to use SPI communications. The other two jumpers allow you to disconnect the power LED and to disconnect the I2C pull-up resistors when chaining several Qwiic devices.

JumperFunction
JP1Holds the Chip Select line low when closed. Close for I2C, open for SPI
JP2Selects the address in I2C mode. Closed for 0x30 by default and open for 0x31. Open for SPI mode to release the D/C pin
JP3Used to select I2C or SPI mode. Close for I2C, open for SPI
JP4This jumper should be closed for I2C and open for SPI. This connection allows SDA to be bi-directional

JP1-JP4

JPX Jumpers

I2C Pull-Up Jumper

I2C devices contain open drains so we include resistors on our boards to allow these devices to pull pins high. This becomes a problem if you have a large number of I2C devices chained together. If you plan to daisy chain more than a few Qwiic boards together, you'll need to cut this I2C pull-up jumper.

I2C Pullup jumper

I2C PU Jumpers