⚙️ Servo Tester using NE555 Timer

📌 Overview

This is a PCB design for a servo motor tester, created using KiCad. The circuit is based on the NE555 timer IC in astable mode, generating PWM signals to control servo motor position. It's a simple tool useful for testing and calibrating servo motors without a microcontroller.

🛠️ Specifications

• Input Voltage: 6V DC
• Timer IC: NE555P
• PWM Output: Variable duty cycle based on RC network
• Output: 3-pin servo header (VCC, GND, Signal)

🧾 Bill of Materials

Component	Value / Part	Qty
Timer IC	NE555P	1
Timing diode	1N4148	1
Timing capacitor	22 nF	1
Resistor	56 kΩ	1
Potentiometer (pulse-width adjust)	—	1
Power-indicator LED + resistor	—	1 + 1
Servo header	3-pin (VCC/GND/Signal)	1

Key components from the design specifications; see the schematic for exact values of any remaining passives.

📂 What's in this repo

• Schematics/ — KiCad schematic source (Servo Tester.kicad_sch) + exported PNG
• PCB_Design/ — KiCad PCB source (Servo Tester.kicad_pcb) + exported PNG
• Gerber_Files/ — ready-to-manufacture Gerbers (Gerber files.zip)
• Images/ — schematic, layout, and 3D renders

🖼️ Preview Images

Schematic	PCB Layout	3D Render

🔧 How to Use

1️⃣ Open the KiCad files in Schematics/ and PCB_Design/ to review or customize the design.
2️⃣ Order the board by sending Gerber_Files/Gerber files.zip to a PCB manufacturer (or regenerate Gerbers from the KiCad files).
3️⃣ Adjust the potentiometer to vary the PWM signal.
4️⃣ Connect a servo to the 3-pin header and power the circuit with 6V DC.

🙏 Credits

This project was created with guidance from the Ampnics YouTube Channel. Thanks to their valuable tutorials!

🔗 Links

• 🚀 Project Discussion on LinkedIn: LinkedIn
• 📺 Ampnics Tutorial Playlist: YouTube

📜 License

This project is licensed under the MIT License – feel free to use, share, and modify it!