Arduino Pro Micro – Multi-Channel Pulse Generator

This project transforms the Arduino Pro Micro into a multi-channel pulse generator. It outputs low-frequency, short-duration pulses on multiple pins (D3, D5, D6, D9). These pulses are ideal for triggering other devices or creating timing signals, such as clock pulses or pulse-per-second (PPS) signals.

🚀 Features

• Four independent pulse channels on D3, D5, D6, and D9.
• Adjustable pulse frequency for each pin (0.5 Hz to 5 Hz by default).
• Adjustable pulse width (10 ms by default).
• Non-blocking code with millis() for stable and continuous operation.
• Easy customization to change frequencies, pulse width, or add more channels.

🛠 Hardware Required

• Arduino Pro Micro (or any Leonardo-compatible board).
• USB cable for connecting to your computer.
• Optional: LEDs for visual feedback on pulse output, or an oscilloscope/logic analyzer to monitor the pulses.

💻 How to Use

1. Open the multi_pulse_generator.ino file in the Arduino IDE.
2. Connect the Arduino Pro Micro to your computer using the USB cable.
3. In the Arduino IDE:
   • Select Tools > Board > Arduino Leonardo (the Pro Micro uses the same architecture as the Leonardo).
   • Select the appropriate COM port under Tools > Port.
4. Click Upload to upload the code to the Pro Micro.
5. Optionally, attach LEDs to the output pins (D3, D5, D6, D9) to see the pulses visually.

📐 Default Pin Configuration

Pin	Frequency	Interval	Pulse Width	Description
D3	0.5 Hz	2000 ms	10 ms	10 ms HIGH every 2 seconds
D5	1 Hz	1000 ms	10 ms	10 ms HIGH every 1 second
D6	2 Hz	500 ms	10 ms	10 ms HIGH every 0.5 s
D9	5 Hz	200 ms	10 ms	10 ms HIGH every 0.2 s

Customizing the Frequencies and Pulse Width

The default frequencies and pulse widths are set in the code, and can be easily modified by changing a few values:

• Frequencies: Edit the intervalX values in milliseconds.
• Pulse Width: Change the pulseWidth variable to increase or decrease the pulse duration.

Example Customization:

To change the frequency of Pin 1 (D3) to 1 Hz and set the pulse width to 20 ms, modify these lines:

const unsigned long interval1 = 1000; // 1 Hz (1000 ms interval)
const unsigned long pulseWidth = 20;  // 20 ms pulse width