Here is a simple Arduino Camping Light project. In this design, only one push button switch is used to control the light output ... This part number (and ofcourse the LED type) is not very critical.

This is a simple 0 to 9 counter circuit constructed using Arduino! Here, a common cathode 7-segment LED display is connected to Arduino ... In case of any doubt refer this table. Push Switch (S1) ...

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