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In this code the LED display shows counting from 9 – 0. When 0 appears on the display it produces buzzer sound. The pin configuration of LED display and connection diagram is given below.
Contents
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Parts List
Common cathode LED display - 1, buzzer - 1, jumper wires (male-male) - 10, Arduino UNO - 1, data cable - 1, resistor 100 ohm (1W) - 1
Note: 100 ohm (1W) resistor is must. If you use small resistor, then it will burn out.
The Code
This code has many applications like in down counter for a typical application or say in controlling a particular gadget through timer.
Just copy the following code and upload it in Arduino UNO to check its working.
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