

What's better than a single LED? Lots of LEDs! A fun way to make a numeric display is to use a 4-digit 7-segment display. LED matrices like these are 'multiplexed' - so to control all the seven-segment LEDs you need 14 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up and they take up a ton of space. Here at Adafruit we feel your pain! After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these adorable LED matrix backpacks come in. We have them for a variety of 8x8 and 7-segment displays. They work perfectly with the displays we stock in the Adafruit shop and make adding a bright display trivial.
The backpacks use a driver chip that does all the heavy lifting for you: They have a built in clock so they multiplex the display. They use constant-current drivers for ultra-bright, consistent color (the images above are photographed at the dimmest setting to avoid overloading our camera!), 1/16 step display dimming, all via a simple I2C interface. The backpacks come with address-selection jumpers so you can connect up to eight 7-segments (or a combination, such as four mini 8x8's and four 7-segments, etc) on a single I2C bus.
Data sheet
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
4-digit 7-segment LED display, 1.2" diagonal, with a built-in controller allowing communication via the I2C bus connected to the Stemma QT/Qwiic connector. Red display. Adafruit 1270
4-digit 7-segment display with MAX7219 driver chip. Adafruit 1269
Module with a 4-element 14-segment display. The board is equipped with a Qwiic connector and communicates via the I2C interface. SparkFun COM-16916
7-segment LED display, 1 digit 38.10mm, bright red (648nm), 20mcd (10mA), common anode, Pb-free. LED1-AS-B-15011BMR
No product available!
7-segment LED display, 1 digit 20.40mm, bright yellow (590nm), 15 mcd (10mA), common anode, Pb-free. LED1-AS-B-08011BMY
7-segment LED display, 1 digit 14,20mm, yellow color (585nm), 2000 ucd (10mA), common anode, Pb-free. LED1-AS-B-05613BY
8x8 matrix or a 4-digit 7-segment display. Matrices like these are \'multiplexed\' - so to control all the seven-segment LEDs you need 14 pins. Adafruit 1002
7-segment LED display, 1 number 45mm, yellow color (585nm), 15mcd (10mA), common anode, Pb-free. LED1-AS-B-18011BMY
No product available!
LED display: 25.40mm 1.00 "single, red (660nm), 12 mcd / seg (10mA), common anode, Pb-free, replacement TOS-1106BH-B, TOS-1106BS-B. LED1-AS-10016BS- B
No product available!
Module with 8-digit 7-segment LED display. The board is equipped with a 74HC595driver and communicates via a digital interface
Module with 6-digit 7-segment LED display. The board is equipped with a TM1637 driver and communicates via a digital interface
7-segment LED display, 1 digit of 56.80mm, bright green (573nm), 40mcd (20mA), common anode, bright red (640nm), 40mcd (20mA), common anode. Pb-free. LED1-AS-B-23011BMRMG
No product available!
7-segment LED display, 1 digit 7mm, blue color (470nm), 4 mcd (10mA), common anode, Pb-free. LED1-AS-B-02811BB
Candy-bar sized 4-digit seven-segment bright crisp display good for adding numeric output. Besides the four 7-segments there is a top right dot (useful as a degrees symbol) and two sets of colon-dots (for time-based projects). Adafruit 1264
7-segment LED display, 1 digit 20.40mm, two dots, green (570nm), 18 mcd (10mA), common anode, Pb-free. LED1-AS-B-08012BMG
LED segment display that allows you to display four digits consisting of 7 segments and a dot, the display can also display a colon. Displayed digits color red, common cathode
7-segment LED display, 1 13.20mm digit, blue color (470nm), 8 mcd (20mA), common cathode, Pb-free. LED1-AS-B-05211AB
No product available!
LED segment display that allows you to display six digits consisting of 7 segments and a dot. The color of the displayed digits is red, common anode
No product available!
4-digit 7-segment display with MAX7219 driver chip. Adafruit 1269