PAJ7620 Gesture Recognition Sensor Module – I2C Hand Motion Detection | Compoden
PAJ7620 Gesture Recognition Sensor Module – 9 Gesture I2C Sensor
The PAJ7620 is a compact optical gesture recognition module that detects 9 hand motions including up, down, left, right, forward, backward, clockwise, counter‑clockwise, and wave. It communicates over I2C and operates with low latency, making it ideal for touchless user interfaces and interactive projects. Power it from 3.3V–5V and pair it with any microcontroller to add non‑contact controls.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V – 5V DC (module‐integrated LDO) |
| Interface | I2C (up to 400 kHz) |
| Gestures Recognized | 9 (up, down, left, right, forward, backward, CW, CCW, wave) |
| Detection Range | 5 – 20 cm from sensor surface |
| Current Consumption | ~3.5 mA active, <1 μA sleep |
| Dimensions | 20 mm × 20 mm |
What You Can Build With This
- Gesture‑controlled robot car that follows hand swipe directions
- Touchless media player with swipe to change tracks and volume
- Hand‑wave LED lamp with brightness and color mode changes
- Contactless menu navigation for a smart mirror or kiosk
Compatibility
The module works with any board that supports I2C, including Arduino Uno, Nano, Mega, ESP32, ESP8266, and Raspberry Pi. It typically runs at 3.3V logic but the onboard regulator allows 5V supply. Use the PAJ7620 library for Arduino or CircuitPython for rapid integration. Pair it with a small OLED for gesture‑feedback interfaces.
Wiring Notes
Connect VCC to 3.3V or 5V, GND to ground, SDA to A4 (Arduino Uno) or GPIO21 (ESP32), SCL to A5 or GPIO22. The board includes 4.7 kΩ pull‑ups on SDA/SCL, so external resistors are not needed. Avoid placing directly under bright sunlight or IR sources to prevent false readings.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, the PAJ7620 works seamlessly with Arduino Uno using the Wire library. Connect SDA to A4 and SCL to A5, and install the PAJ7620 Arduino library.
How far can it detect gestures?
Detection range is 5–20 cm under normal indoor lighting. For best results keep your hand within 15 cm and move at a moderate speed.
Does it work with 5V systems?
The module accepts 5V input thanks to its onboard LDO regulator, making it safe for both 3.3V and 5V microcontrollers. I2C lines are 3.3V tolerant.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
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