LED Matrices and Backpacks

The 2x mini 8x8 LED matrices are soldered to the backpacks. The pinouts are symmetrical so they can be orientated either way.

Solder LED Matrix

Insert the pins from the 8x8 LED matrix through the top of the backpack. Ensure the LED matrix is installed correctly and flush with the PCB. A stick vise can help keep the components in place while soldering. 

Soldered LED Matrix

Check all of the pins are properly soldered.

Trim Pins

The pins are long and need to be trimmed in order to fit inside the 3D printed enclosure. Use flush cutters to shorten the pins from the LED matrix.

Jumper A0

Solder the A0 jumper on one of the LEDs matrices to set the address to 0x71. This matrix will be setup as the bottom half of the hourglass.

This guide was first published on Jul 07, 2020. It was last updated on Jul 07, 2020.

This page (Matrix Setup) was last updated on Jan 12, 2021.