7 Segment Led Ht16k33 Backpack

This version of the led backpack is designed for these big bright 7 segment displays.

7 segment led ht16k33 backpack.

These 7 segment displays normally require 13 pins 5 characters and 8 total segments each this backpack solves the annoyance of using 13 pins or a bunch of chips by having an i2c constant current matrix controller sit neatly on the back of the pcb. With 2 leds per segment these make a gorgeous and impressive display. This is the magic sauce in our 7 segment and matrix backpacks now available in breadboard friendly breakout board format. Adafruit led backpack library for our 8x8 matrix and 7 segment led backpacks adafruit adafruit led backpack.

The functions included in this demo sketch should be all that s needed to control the ht16k33 s led matrix from an arduino. For the demo sketch i m using a 16 bit buffer which makes each array element correspond to all outputs for a given com pin you could also use an 8 bit buffer which would make things easier if i only had 7 segment displays. Matrices like these are multiplexed so to control all the seven segment leds you need 14 pins. The ht16k33 led driver chip can control up to 16 x 8 leds.

These backpacks drive the massive 1 2 7 segment modules. The ht16k33 is a neat little chip that has the ability to drive a multiplexed 16x8 matrix that s 128 individual leds. This backpack uses an i2c constant current matrix controller on the back of the pcb so you only need 2 pins to drive it. These displays get their name because of the controller chip attached to the back of them like a backpack.

Adafruit industries unique fun diy electronics and kits adafruit 0 56 4 digit 7 segment display w i2c backpack yellow id. There are maker friendly modules available with 7segment leds 14segment leds dot matrix and even blank pcb als simple backpacks for your own project. The 7 segment displays normally require 16 pins to drive. 879 what s better than a single led.

As the ht16k33 communicates via i2c you only need two gpios.