Adafruit 2974 Charlieplexed LED Matrix White 16x9

Adafruit 2974 Charlieplexed LED Matrix White 16x9
£8.50  

Adafruit Charlieplexed LED Matrices 16x9 - Adafruit 2974, The Adafruit Charlieplexed White LED 9x16 Matrices give you boards full of bling with 144 x 0603 surface mount LEDs. With traditional multiplexing you would need 25 GPIO lines (9 + 16) to drive these boards which would soak up most of the signals on common microcontrollers. However, these boards are Charlieplexed, which is a clever way of doing more with less, using only 18 GPIOs. They can best be described as lean at only 2.4mm thick and 43.3 by 27.8mm (1.7 x 1.1 x 0.09in.). The boards dont have any limiting resistors or drivers, its just the LEDS, so you can use them at whatever voltage suits your microcontroller. Adafruit have a free tutorial to get you started. Charlieplexing can be a daunting thing when you first see it and for those times when you just want to get something working without the fuss theres the Adafruit Charlieplexed PWM Matrix Driver (73-5266). This driver board is exactly the same size as the matrix board and is pin for pin compatible, just pop in a couple of double sided headers to get an LED matrix with I2C driver. Importantly the driver boards have PWM, meaning that the LEDs are individually dimmable which is rare for a single colour LED matrix. Adafruit 2974 Charlieplexed LED Matrix White 16x9

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Adafruit 2974 Charlieplexed LED Matrix White 16x9

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