This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

The product page for 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).

Each buzzer consists of an Arduino Pro Mini 3.3 V, a nRF24L01, ... The LED on the appropriate buzzer box is illuminated so the players know who got in first.

Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting resistor and the all-important buzzer. ... to build a project based on your 1D LED pong, Arduino-style ...

To build this DIY buzz wire game, you'd need an Arduino Nano, a 9V battery, two LEDs (red and green), a buzzer, a seven-segment LED display, a shift register for the display, and resistors for the ...

The Arduwire UNO is an innovative shield designed for the Arduino UNO development board. ... while a red LED and buzzer signal a problem such as an open circuit, short, or miswire.

Making objects interactive doesn’t have to be overwhelming—the best Arduino starter kit will ... and produce real-world results like illuminating an LED, activating a buzzer, and other fun ...