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This paper sets out a virtual reality application dedicated to electronics virtual experiments: circuit design and simulation. The virtual environment offers virtual components (resistors, capacitors, inductors, diodes, transistors and operational amplifiers) and virtual electronics equipments (generators and oscilloscopes) They are described in a standard Virtual Reality Modeling Language (VRML) format. Students can choose components and build a circuit. A remote simulation of the circuit is achieved using the SPICE program, which is a general-purpose circuit simulation program for non-linear dc, non-linear transient, and linear ac analyses. Simulation results are displayed on virtual electronics equipments, which are involved into the simulation. The implementation is based on VRML and Java as languages and Cortona VRML plug-in from ParallelGraphics.

This paper sets out a System that enables a teacher to get a real time feedback from a large group of students' understanding. A teacher can quickly set up a question and submit this question to his students. The server implements a LAMP (Linux, Apache, MySQL and PHP) architecture. We propose different types of clients that are targeting most of equipments available today: computers, mobile phone, smartphone... Thus, any student may easily find a tool to answer to any question. This System implements various types of technologies: databases, web technologies, object oriented programming...

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