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PWM/README.md
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# 🟧 Multi-Digital Pins
# 🟨 PWM
### What are Multi-Digital Pins?
### What is PWM?
Some modules use **more than one digital pin** to work properly. These pins allow the module to send or receive multiple signals at the same time—for example, controlling multiple LEDs, handling different colors, or measuring distance with precise timing.
PWM (Pulse Width Modulation) is a technique used to **control power** to devices by turning the signal on and off very quickly.
By adjusting how long the signal stays on during each cycle, we can control things like **brightness**, **speed**, or **intensity**.
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### Included Modules:
#### 🔌 Inputs:
- [Ultrasonic Sensor](#module-01-ultrasonic-sensor)
#### 💡 Outputs:
- [RGB LED](#module-02-rgb-led)
- [Traffic Light](#module-03-traffic-light)
- [Fan Motor](#module-01-fan-motor)
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### Module 01: Ultrasonic Sensor
### Module 01: Fan Motor
![](../Images/42.png)
#### Block:
![](../Images/45.png)
This sensor reads **distance** from the physical world using ultrasonic sound waves. It uses **two pins**: one to trigger the signal and one to receive the echo.
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### Module 02: RGB LED
![](../Images/43.png)
![](../Images/37.png)
#### Block 1:
![](../Images/46.png)
![](../Images/38.png)
This block controls the **red**, **green**, and **blue** channels using **ON/OFF** values.
This block controls the fan speed in a range from **1 to 100**.
#### Block 2:
![](../Images/48.png)
![](../Images/39.png)
This block controls the brightness of **red**, **green**, and **blue** individually, using values from **0 to 255** to mix custom colors.
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### Module 03: Traffic Light
![](../Images/44.png)
#### Block 1:
![](../Images/47.png)
This block turns the **red**, **yellow**, and **green** lights **ON or OFF**.
#### Block 2:
![](../Images/49.png)
This block allows you to adjust the **brightness** of the red, yellow, and green lights using values from **0 to 255**.
This block controls the fan speed in a range from **1 to 1023**.
#### Block 3:
![](../Images/40.png)
This block controls the fan speed in a range from **1 to 100**, with **direction control**.
#### Block 4:
![](../Images/41.png)
This block controls the fan speed in a range from **1 to 1023**, with **direction control**.
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