Our project is infact an Arduino with Serially Interfaced MAX7219 Operates an 8X8 LED Matrix to display a heart pattern. The MAX7219 IC is a serial input/output common-cathode display driver that ...

Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, ... /* * Arduino 4x7 LED Display * Displays numbers ranging from 0 through 1023 * Test Code displays the value of a sensor ...

The circuit on the left can interface with any one of those, plus any 5V logic signal if a dc voltage of 5, 12 or 24V is also available. 16mA has been chosen for the led current to match the drive ...