Remote laboratories are becoming a popular practice for undergraduate and graduate engineering laboratories. The remote laboratories enable students to access lab facilities out of the official laboratory time and automatically see the results without presence of the laboratory assistants. This paper presents an ad hoc, interactive and cost-efficient remote laboratory framework that has been designed for a "Digital Systems Modeling and Synthesis" course with the intention of improving quality of the laboratory work. Many challenges of designing remote labs have been discussed based on the authors' experience with this concept.