The Simplified I/O Interface - How it Works. The Simplified I/O Interface - How it Works ... Output The ULN2803 Integrated Circuit (IC) is a "Eight-way Line Driver". The IC takes small current at its 8 input pins (pins 1 to 8) and allows much larger current (up to one amp) to flow via its output lines.
In this application of the ULN2803 IC, small currents available at the Printer Port are used to control devices that could not be connected directly to the Port, such as motors and relays. TKJ Electronics » Arduino RGB LED Controller. Led RGB & ULN2803 - Arduino - Alim 5V - [Part 1] Building a remotely controlled mood light. Building a remotely controlled mood light Details Details Last Updated on Wednesday, 06 February 2013 18:59 It has been done before but I wanted to create my own mood light with the Arduino.
And not just a mood light: I wanted one with multiple built-in programs ('modes'), which one can switch between by using a remote control.