Qwiic Transparent OLED HUD Hookup Guide

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Contributors: Englandsaurus
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Hardware Overview

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

CharacteristicRange
Operating Voltage1.65V-3.3V
Supply Current400 mA
I2C Addresses0x30, 0x31

Notice that the OLED can pull about 400 mA of current, so ensure you have a robust enough power supply, especially if the OLED isn't the only thing you're powering. Also notice that the OLED sits on two I2C addresses, so make sure that any other I2C devices don't take up addresses 0x30 and 0x31.

Pins

The following table lists all of the transparent OLED's pins and their functionality.

PinDescriptionDirection
GNDGroundIn
3.3VPowerIn
SDADataBi-directional
SCLClockIn

Optional Features

The Transparent OLED breakout has pull-up resistors attached to the I2C bus; if multiple sensors are connected to the bus with the pull-up resistors enabled, the parallel equivalent resistance will create too strong of a pull-up for the bus to operate correctly. As a general rule of thumb, disable all but one pair of pull-up resistors if multiple devices are connected to the bus. If you need to disconnect the pull-up resistors they can be removed by cutting the traces on the corresponding jumpers highlighted below.

Pull-up Jumpers

Pull-up Jumpers

The onboard LED (highlighted below) will light up when the board is powered.

Power LED

Power LED