Laboratory experiments are a crucial and most practical part in university courses to apply and observe inner dependencies of theoretical concepts introduced in lectures, especially in engineering. The capacities for these are usually limited due to the high personnel support effort, which increases with the number of students. Therefore, remote laboratories (ReLabs) can provide a scalable, continuously available substitute or additional offer to the usual on-site laboratories. Upon a ReLab, developed in 2017, we propose a further development as well as the implementation in two additional courses. The ReLab is completely open-source on the software side and only requires off-the-shelf personal computers and webcams next to the custom test bench on the hardware side. To evaluate the benefits to students, we surveyed participants from three courses.