Plug the RFID module into the breadboard with enough space around it. Connect the VCC pin to the Arduino's 3.3V (not 5V), and ...

Similarly, pin notation for the infrared receiver module is OUT(D2)-GND-5V ... fadeValue); delay(30); } } The following Arduino Sketch tests the four-digit, seven-segment LED display. Needless to say, ...

Here is a simple, yet useful circuit of an Arduino 4-digit 7-segment LED display unit. The module used here is a self-contained, compact common-cathode module containing four 7-segment LED numeric ...

[Martin2250] has been working on a spinning disc style POV display. He’s posted ... He tried using the Arduino micros() function to delay between the photodiode pulse and turning on his LEDs.

so whipped up a neat design using analog meters to display the time. The build relies on that old stalwart, the Arduino Uno, to run the show. It’s hooked up to a DS3231 real-time clock module so ...