RC Servo Signal Tester Kit with Arduino Uno + Servo
Precision Servo Tester with Arduino Uno & OLED – Read Pulse Width in Microseconds
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Calibrating servos for a robotic arm? Diagnosing erratic motion in an RC plane? With this kit, you build a handheld, battery-powered signal tester that generates precise PWM pulses for any standard servo, displaying the pulse width live on a bright OLED screen. A twist of the potentiometer instantly lets you sweep the servo through its full range and verify dead-band, center, and linearity — all without a computer.
What You'll Build
A pocket-sized instrument that puts servo diagnostics in the palm of your hand. Connect any RC servo, rotate the knob, and the attached servo follows your command while the OLED shows the exact pulse width in microseconds (typically 500–2500 µs). Use it to identify faulty servos, find the precise center position, map custom angle limits, or just demonstrate PWM principles in a CBSE classroom.
What You'll Learn
- Generate PWM signals using Arduino's Servo library and control them with a potentiometer
- Read analog input, map it to microsecond values, and translate it to servo angles
- Interface an I2C 0.96-inch OLED display to show real-time pulse width data
- Compare and calibrate different servo models — micro SG90 and high-torque MG996R — under the same reference
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| SG90 Servo | x1 |
| MG996R Servo | x1 |
| 10kΩ Potentiometer | x1 |
| 0.96in OLED | x1 |
| 4.7kΩ Resistors | x5 |
| 400-pt Breadboard | x1 |
| M-M Wires | x20 |
| 9V Battery Snap | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Designed for CBSE Class 11-12 students diving into microcontroller projects, B.Tech ECE/EEE students prototyping servo-based mechanisms, and ATL Tinkering Lab mentors demonstrating real-time sensor feedback. Young enthusiasts (10–15 years) can build it with minimal adult supervision, while hobbyists from IIT/NIT/VIT/BITS robotics clubs will use it as a permanent bench tool for testing SG90, MG996R, and any standard RC servo.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to launch the AI companion that walks you through wiring and code. You can also send a WhatsApp message to our support team with a photo of your setup and get a reply within hours.
Can I use this tester with servos other than the included SG90 and MG996R?
Absolutely. The circuit accepts any standard RC servo with a 3-pin connector. The pulse width display and potentiometer sweep work for servos that accept 500–2500 µs signals.
How accurate is the pulse width measurement on the OLED?
The Arduino Uno timer resolution gives pulse width readings within ±4 µs, which is more than enough for servo calibration, dead-band testing, and angle mapping.
Does the kit include a 9V battery?
The kit includes a 9V battery snap connector; a standard 9V battery is not included due to shipping regulations but is widely available locally. Alternatively, you can power the Arduino via its USB port during testing.
Potentiometer generates servo PWM. OLED shows pulse width in microseconds. Tests any RC servo.
What's in this kit
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items