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 8-digit 7-segment LED display. The board is equipped with a 74HC595 driver and communicates via a digital interface
7-segment LED display, 1 digit 7mm, green color (570nm), 4000 ucd (10mA), common cathode, Pb-free. LED1-AS-B-02811AG
No product available!
7-segment LED display, 1 digit 38.10mm, bright red (648nm), 20mcd (10mA), common anode, Pb-free. LED1-AS-B-15011BMR
No product available!
4-digit 7-segment 0.56 "LED display. Built-in HT16K33 controller allowing communication via I2C bus. Equipped with STEMMA QT connector. Adafruit 5602
No product available!
7-segment LED display, 1 digit 20.40mm, red color (630nm), 6 mcd (10mA), common anode, Pb-free. LED1-AS-B-08011BS
7-segment LED display, 1 digit 7mm, blue color (470nm), 4 mcd (10mA), common anode, Pb-free. LED1-AS-B-02811BB
7-segment LED display, 1 digit 20.40mm, green color (570nm), 15 mcd (10mA), common anode, Pb-free. LED1-AS-B-08011BMG
7-segment LED display, 1 digit 14,20mm, yellow color (585nm), 2000 ucd (10mA), common anode, Pb-free. LED1-AS-B-05613BY
LED display 13.2 mm 0.52 "single, red (635nm), 24 mcd / seg (10mA), common anode, RoHS. LED1-AS-05219BMR-B
Module with 8-digit 7-segment LED display. The board is equipped with a 74HC595 driver and communicates via a digital interface
7-segment LED display, 1 digit 7mm, green color (570nm), 4000 ucd (10mA), common anode, Pb-free. LED1-AS-B-02811BG
No product available!
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 7mm, red color (660nm), 9 mcd / seg (10mA), common anode, Pb-free. LED1-AS-B-02811BS
No product available!
Design a clock, timer or counter into your next project using our pretty 4-digit seven-segment display. These bright crisp displays are good for adding numeric output. Besides the four 7-segments, there are decimal points on each digit and an extra wire for colon-dots in the center (good for time-based projects). Adafruit 813
No product available!
Module with 4-digit 8-segment LED display. Communication via the SPI interface. Waveshare Pico-8SEG-LED
Module with 6-digit 7-segment LED display. The board is equipped with a TM1637 driver and communicates via a digital interface
4-digit 7-segment display with MAX7219 driver chip. Adafruit 1269