Large Digit Driver Hookup Guide

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Contributors: Shawn Hymel
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Hardware Hookup

Protect the Board

Before you attach the Large Digit Driver to the 7-segment display, you will need to isolate the exposed vias on the back of the board. Some of the Driver boards are created with through-hole vias that are not covered with solder mask. As a result, this could likely short out the traces on the back of the 7-segment display.

We recommend using a piece of electrical tape or high temperature tape to cover the vias on the back of the Driver board.

Cover vias with tape

Attach the Board

You will need to solder the Large Digit Driver to the back of the 7-segment display. Have the Driver's 10 pins facing toward the bottom of the large 7-segment display and lined up with the traces on the back of the 7-segment display. Follow the Soldering Castellated Vias Guide to solder all 10 of the castellations as well as the 2 castellations at the top of the board (these should be attached to the 12V line and are just for mechanical support).

Soldering pins on HX711 Large Digit Driver

Connect the Board

We will be using the Arduino's regulated 5V and unregulated 12V (from the wall adapter) to power the 7-segment display and Large Digit Driver.

Connect the Large Digit Driver to the the following pins on the Arduino.

Fritzing of Large Digit Driver connections

Large Digit DriverArduino
GND GND
LAT5
CLK6
SER7
5V5V
12VVIN