Matrix keyboards are commonas an input device in microcontroller-based projects. A conventionalway of connecting a matrix keyboardto a microcontroller is to use multipleI/O pins of the MCU. The MCU ...
In this project, the RGB LED contains 3 LEDs encased in one shell which looks like a single white LED except that it has for leads where one lead is for the common ground and one for each LED. During ...
Microcontroller port pins can typically be driven either high or low, or else be put into an "input" or high-impedance state. This circuit uses the three states to drive two separate LEDs with one ...
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