Monday, February 15, 2021

LED Bar Graph Voltage Level Indicator With PIC18F4550

In the previous post, we show how to use ADC library function in CCS PICC. Here, the ADC is still in the discussion. In this example, I use almost the same source code, but one's difference is the output LED displays a bar graph pattern indicating the level of input voltage reading from the AN0.




ADC result is still 8-bit. This 8-bit result is scaled into an 9 number values correspond to 8 output LEDs on PORTD.




LED Bar Graph Voltage Level Indicator With PIC18F4550
LED bar graph running

Source code from GitHub gist.


Click here to download this example in zip file.

Schematic Diagram



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