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).

When you think of Arduino projects, your mind likely goes ... With each contact you make, the red LED lights up, the buzzer beeps and the seven-segment LED display counts up.

In this article I will add some simple Arduino LED projects starting with basic ones like how to turn on an LED, blinking, and more. Every step will have the code, the schematic, photos of the project ...

Each unit consists of an arcade button and one LED, both housed in a project ... an Arduino board which polls the buttons to see which is pressed first. The LED on the appropriate buzzer box ...

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.

So you finally decided to hop on the Arduino bandwagon and start making electronic projects as a fun hobby ... keypad), output (e.g., LED, DC motor, LCD), power (e.g., 9V battery, solar cell ...

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 ...