# LED Bar Graph

Day 7 of the 100 Days 100 IoT Projects collection. Board: ESP32.

Ten LEDs light up in sequence as you turn a potentiometer, visualizing analog levels on the ESP32. Simple ADC-to-output mapping made visible.

## How it works

The potentiometer's analog value is scaled from its full range down to a count between zero and ten. That count decides how many of the ten LEDs light up, so the row of LEDs behaves like a physical meter for the knob position.

## What you'll learn

- Value scaling and mapping
- LED array driving
- Analog visualization
- Range quantization

Full project (code, wiring diagram, Wokwi simulation): https://github.com/kritishmohapatra/100_Days_100_IoT_Projects/tree/main/Potentiometer_Visualizer

Summary by SkillShop. Code and diagrams belong to the original repo.