dBPlotter Application 🎶📈

A JavaFX-based desktop application designed to interface with the Bruel & Kjaer 2306 Level Recorder. This application processes acoustic data from CSV files (ARTA and REW formats) and sends control commands to the device over a serial connection. This useless and stupid idea allows generating report prints like in the old days. What you see in ARTA or REW will simply be printed on paper. That's all.

Compatible with macOS, Windows, Linux, see the release section.

🚀 Features

• Import CSV files from ARTA and REW.
• Display a plot of frequency vs. amplitude.
• Downsampling and smoothing for better readability.
• Automatic calculation of min/max frequencies and amplitude.
• Real-time control of the paper speed.
• Serial communication with the B&K 2306 over Arduino.

For exemple :

The Bruel & Kjaer 2306 Level Recorder

📸 GUI Overview

🔌 Interface Overview

To interface with the Bruel & Kjaer 2306, I created a DAC interface using an Arduino.

Be aware that the B&K "Ext. port" use a 272° DIN 8 pinout (see in the service manual).

Operation Principle

The software sends serial commands to the Arduino, which uses a 16-bit DAC to convert the digital signal into an analog output within a 0-5V range.
The Arduino manages the paper feed motor's activation and speed.

A relay closes a connection to start the paper feed motor, while the speed is regulated by a TTL signal.