swampstream / reremeter

This repository contains the software and hardware for a low-cost and handheld system for the identification of plastic types based on discrete near infrared (NIR) reflectance spectroscopy.

reremeter

Reremeter is an handheld and low-cost discrete near infrared reflectance spectrometer and a machine learning algorithm developed to detect different types of plastic. Watch our video to find out more!

This repository contains all the files required to build an reremeter from scratch, and you can use them to make your own version. Please take note that this work is published under GPL-3.0.

How to get started

Please note the current Issues before getting started with the build of your own reremeter.

Now the guide on how to get started with the build of your own reremeter.

• Build your own hardware.
• Build and upload the firmware.
• Collect data of your samples (or check out our example dataset).
• Make Predictions using our provided Python scripts.
• Visualize results in an UI.

Additional information

• The main idea behind this project came from reading this paper about Identification and classification of plastic resins using near infrared reflectance spectroscopy by Hamed Masoumi, Seyed Mohsen Safavi, and Zahra Khani.
• Inspiration for the analog frontend design was given by the ADS1255 reference designs on the TI website. They used this ADC in several DLP NIR spectrometer designs. (e.g. DLP® NIRscan™ Evaluation Module, DLP Ultra-mobile NIR Spectrometer for Portable Chemical Analysis with Bluetooth Connectivity)
• Super interesting MEMS spectrum sensor. You can read more about this on OpenRecycling.

Notes

The reremeter project was created at RealRecycling by Armin Straller and Bernhard Gessler.