You won’t be able to look away from the mesmerizing patterns created by this Adafruit CharliePlex LED Matrix Display Bonnet. This 16×8 LED display can be placed atop any Raspberry Pi computer with a 2×20 connector, for a beautiful, bright grid of 128 CharliePlexed LEDs. It even comes with a built-in CharliePlex driver that is run over I2C.
The IS31FL3731 will let you get back to that classic LED matrix look, with a nice upgrade! This I2C LED driver chip has the ability to PWM each individual LED in a 16×9 grid so you can have beautiful LED lighting effects, without a lot of pin twiddling. Simply tell the chip which LED on the grid you want lit, and what brightness and it’s all taken care of for you.
The IS31FL3731 is a nice little chip – it can use 2.7-5.5V power and logic so its flexible for use with any microcontroller. You can set the address so up to 4 matrices can share an I2C bus. Inside is enough RAM for 8 separate frames of display memory so you can set up multiple frames of an animation and flip them to be displayed with a single command.
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