This work presents a hands-on molecular communication (MC) testbed developed for the undergraduate Communication Engineering lab course at the Institute for Communications Technology (IfN), TU~Braunschweig. The goal of the experiment is to provide students with an intuitive and reproducible introduction to MC concepts using a low-cost and accessible fluidic setup. The system employs a background water flow into which three dye colors are injected and symbols are detected by a multi-wavelength photosensor. A zero-forcing--based estimator is used to separate the spectral components and reliably identify the transmitted colors. The experiment is designed to be completed independently by students within a single laboratory session and requires only basic prior knowledge from introductory communication engineering courses. A detailed script accompanies the experiment, guiding students through channel characterization, color detection, pseudoinverse computation, and simple data transmission using on-off keying. In pilot trials, students successfully reproduced the entire communication chain and achieved stable data rates of up to 0.5~bit/s over a 15~cm channel. The proposed testbed demonstrates that fundamental principles of MC can be taught effectively using a compact and inexpensive experimental setup. The experiment will be integrated into an undergraduate lab course.

翻译：本文介绍了一种为布伦瑞克工业大学通信技术研究所本科通信工程实验课程开发的动手实践型分子通信实验平台。该实验旨在通过低成本、易获取的流体装置，为学生提供直观且可复现的分子通信概念入门。系统采用背景水流，注入三种染料颜色，并通过多波长光传感器检测符号。基于迫零的估计器用于分离光谱分量并可靠识别传输的颜色。实验设计为可由学生在单次实验课内独立完成，仅需通信工程导论课程的基础先验知识。实验配有详细指导手册，引导学生完成信道表征、颜色检测、伪逆计算以及使用开关键控的简单数据传输。在试点测试中，学生成功复现了整个通信链路，并在15厘米信道上实现了高达0.5比特/秒的稳定数据传输速率。该实验平台表明，分子通信的基本原理可通过紧凑且廉价的实验装置有效传授。该实验将被纳入本科实验课程。