A resistor is an electrical device that resists the flow of electrical current. In the digital era, we can find a variety of “digital resistors” for our everyday applications. This article is about ...

The digital pot works just like a normal pot, but it’s digitally controlled by the Arduino. Meanwhile, each column of LEDs is activated by a separate transistor.

IC1 is an MCP41010 10-kâ ¦ digital potentiometer used for R A + R B. IC2 is an MCP42010, a dual 10-kâ ¦ digipot that provides both potentiometers R C and R D in Figure 4.