Let it hit your red LED and you’ve lost a point ... resistor and the all-important buzzer. We like how [newsonator] wired up the LEDs to the Arduino by soldering them to a row of header pins ...

The base unit houses an Arduino board which polls the buttons to see which is pressed first. The LED on the appropriate buzzer box is illuminated so the players know who got in first. One special ...

Figure an Arduino most matches the "Other ... There is no need for a current-limiting R (as for an LED). You could verify this with a DMM: Connect the buzzer to a DC supply with the DMM in ...

This sketch will guide the Arduino in performing the necessary tests on the cable. The green and red LEDs, along with the buzzer, will provide immediate feedback on the test results. A green LED ...

Recently, we published an entry-level Arduino project with a single seven-segment LED display. Although it’s an amazing DIY project, we noted that most of the readers are looking for more advanced ...

Digital (pwm) pin D3 drives the piezo-buzzer through a PNP transistor ... fadeValue); delay(30); } } The following Arduino Sketch tests the four-digit, seven-segment LED display. Needless to say, the ...