When you read “Arduino wristwatch”, you fall into the ... the time because it is bad on the battery. When you press the button once, you get one of the LEDs to light to show the hours.

He connects a resistor/capacitor ... simple Arduino code that illustrates the concept. However, the technique is simple enough that you can adapt it to other projects easily. Think one button ...

Here, a common cathode 7-segment LED display is connected to Arduino for displaying the digits. The code (Arduino sketch) allows push button increment of the counter from 0 to 9. The whole circuit can ...