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Adafruit Trellis Monochrome Driver PCB for 4x4 Keypad & 3mm LEDs

Adafruit Trellis Monochrome Driver PCB for 4x4 Keypad & 3mm LEDs - Trellis is an open source backlight keypad driver system. It is easy to use, works with any 3mm LEDs and eight tiles can be tiled together on a shared I2C bus. Each Trellis PCB has 4x4 pads and 4x4 matching spots for 3mm LEDs.

- ELECTRICITY - A visual cheat sheet about electrical physics, containing the most important formulas of current and Ohm's law expressed through an impossible water circuit analogy.

Watch Edward Snowden Teach Vice How to Make a Phone ‘Go Black’

Shane Smith interviewed the whistleblower in Moscow and got the details on how to hack into smartphones so they can't be used for surveillance.