Statistical Process Control Chart Kit with Arduino Mega + DHT22
Real-Time Statistical Process Control Dashboard: Arduino Mega DHT22 TFT Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn your Arduino Mega into a statistical quality control station that continuously plots temperature/humidity on a TFT screen, calculates rolling mean and ±3-sigma control limits, and triggers a buzzer alarm the instant a measurement goes out of control. Perfect for CBSE class 12 data science projects, B.Tech mini-projects, or Smart India Hackathon prototyping.
What You'll Build
An embedded SPC system that reads DHT22 sensor data every few seconds, computes the moving average and standard deviation, draws a live scatter plot with control limits on a 1.8-inch TFT, and sounds an alert when a point breaches the 3-sigma band. The display updates in real time, turning raw sensor numbers into an industrial-grade monitoring tool that runs standalone on a 9V battery.
What You'll Learn
- Program Arduino Mega to read DHT22 sensor via one-wire protocol
- Implement rolling window statistics (mean, standard deviation) in C/C++
- Drive an ST7735 TFT display with graphics primitives to draw charts
- Design an alarm system using active buzzer for out-of-control detection
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| DHT22 | 1 |
| 1.8in TFT ST7735 | 1 |
| Active Buzzer | 1 |
| 10kΩ Resistors | 5 |
| 100nF Capacitors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 1 |
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
This kit is designed for CBSE Class 12 students building a data analysis project, B.Tech ECE/EEE undergraduates prototyping a real-time monitoring system, and participants in Smart India Hackathon who need a ready-to-run statistical quality control demo. It fits ATL Tinkering Labs that teach 15-18 year-olds to combine sensor data with graphical display on Arduino Mega.
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 on the box to chat with the AI companion trained on this exact project, or send a WhatsApp message to our support team for one‑on‑one help.
Can I monitor other sensors instead of DHT22?
Yes, the project teaches you statistical methods and graphing routines. Once you complete the initial build, you can adapt the code to read data from any analog or digital sensor.
Does this kit work on a battery?
Absolutely. The 9V battery snap included powers the Arduino Mega and all peripherals, making the SPC dashboard portable for field demos or hackathon presentations.
Do I need prior experience with statistics?
The AI companion walks you through the control chart logic step‑by‑step. Basic familiarity with mean and standard deviation is helpful but not mandatory; explanations are built into the guide.
Rolling mean and 3-sigma control limits drawn in real time on TFT. Alarms on out-of-control points.
What's in this kit
- Arduino Mega 2560
- DHT22
- 1.8in TFT ST7735
- Active Buzzer
- 10kΩ Resistors x5
- 100nF Caps x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
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