PitFusion thermal camera solution for Raspberry Pi

Ivmech Mechatronics Ltd., a Turkey-based embedded design team specializing in camera modules and Raspberry Pi hats, is preparing to launch an upcoming crowdfunding project called PitFusion. This compact imaging solution integrates a Melexis thermal sensor with a Raspberry Pi camera module. This integration enables embedded designers and hobbyists working with Raspberry Pi or other compatible single-board computers to simultaneously capture thermal and visible light images.

The name PitFusion is inspired by the pit viper, a type of snake known for its infrared heat receptors that detect thermal signatures of potential threats. This concept parallels the module’s capability to identify heat sources through thermal imaging. The hardware is designed for use in various applications, including automation, robotics, security, and environmental monitoring.

Specifications of PitFusion Thermal Imaging Solution

• Thermal sensor: Melexis MLX90640
  • Frame rate: 0.5 Hz to 32 Hz
  • Pixel IR array: 32×24
  • FOV options: 55°x35° and 110°x75°
  • Packaging: Industry-standard 4 lead TO39 package
• Camera Resolution: 5 MP
  • Pixels: 2592 x 1944
• Temperature Range: -40° C to 300° C
• Spectral Range: 8 µm to 14 µm
• Interfaces: I2C (thermal sensor), CSI (camera)
• Software Support: Compatible with Raspberry Pi, Python, OpenCV, and custom APIs
• Dimensions: 40x30x10 mm
• Weight: 15 grams

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At the core of the imaging module is the Melexis MLX90640, a low-cost, fully calibrated infrared thermal sensor array featuring 768 far-infrared pixels arranged in a 32×24 grid. It comes in an industry-standard TO39 package and includes a digital I2C interface for seamless integration. This standard digital interface is crucial for simple communication with microcontrollers such as Raspberry Pi and Arduino.

PitFusion is a unique solution because of its capability to capture thermal and visible images in real-time, all housed within a compact form factor that is ideal for portable and embedded applications. Thanks to its design approach, PitFusion functions as a plug-and-play device compatible with Raspberry Pi and other single-board computers. The choice to use the popular MLX90640 sensor was intentional, as it employs passive sensing technology that does not emit radiation, only detecting infrared.

Like many other projects on CrowdSupple, PitFusion is released as open hardware under the GPL-3.0 license, granting interested users the freedom to modify and enhance its features and functionality.

The project files, including the source code, will be accessible on GitHub, with schematics and PCB layout files made available after the crowdfunding campaign concludes.

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