You have an Arduino program ready to be used on your board ... With each contact you make, the red LED lights up, the buzzer beeps and the seven-segment LED display counts up.

Figure an Arduino ... that buzzer says "current consumption: 20 mA" These piezo buzzers can be corrected directly to a DC supply. There is no need for a current-limiting R (as for an LED).

[Flute Systems] has released an open source DIY game buzzer system based on the Arduino that will help instantly ... and twin four digit seven-segment LED displays. [Flute Systems] says you ...

Let it hit your red LED and you’ve lost ... Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting resistor and the all-important buzzer.

The Arduino Nano Connector Carrier is a compact add-on board designed for the Arduino Nano boards to allow easy connection to ...

An educational talking Arduino computer ... an 8×8 LED matrix, a relay that is able to control high power devices, a 10-button ADC keypad, 8x DIP switches, an active buzzer, a 16×2 LCD, a ...

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...