By popular request, you can now get Adafruits 7-segment LED backpacks without the LEDs!
These backpacks feature an HT16K33 I2C LED driver, they're simple and easy to use - you can use this very nice library for the backpacks to get running in under half an hour, with numbers on the 7-segment. If you've been eyeing matrix displays but hesitated because of the complexity, this is the solution you've been looking for!
Like Adafruits other LED backpacks, these are end-to-end stackable and by soldering the address jumpers on the back you can have up to 8 backpacks all sharing the same two I2C wires.
To get you going fast, Adafruit have revised this popular board to be the same size and pinout as before but now with two STEMMA QT connectors on either side that are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the HT16K33 or to chain it with a wide range of other sensors and accessories using a compatible cable.
Comes with a fully tested and assembled LED backpack & 4-pin header. Some light soldering is required to attach the header if you desire to use this on a breadboard, and, of course, the display.
A 4-digit 0.56" tall 7-segment display is not included. We only know that this backpack works with the ones Adafruit stock. Other 7-segment displays may not work, Adafruit don't guarantee 'em.
As of Jan 19 2022 - This PCB has been revised to include two vertical-mount STEMMA QT connectors so that the board can be plug-and-play with STEMMA QT cables and devices!
Product Dimensions: 50.0mm x 26.7mm x 6.0mm / 2.0" x 1.1" x 0.2"
Product Weight: 5.6g / 0.2oz