Datasheet

Adding LEDs
The Trellis PCB comes with all the driver circuitry but doesn't come with LEDs installed! This is because we know
people want to get creative with the LED colors - choose any color you like! Diffused 3mm LEDs with 250mcd+
brightness look best.
As you can see here, the LEDs sit inside the button cavity and the two button contacts surround it. This allows for the
nice frosted LED effect.
The LEDs are seperately controlled from the buttons - an Arduino or similar is required to read data from the buttons
and then write out what LEDs to light up.
© Adafruit Industries https://learn.adafruit.com/adafruit-trellis-diy-open-source-led-keypad Page 7 of 27