Summary:
- The article discusses a simple and inexpensive free-space optical communication system that can be used for short-range wireless data transmission.
- The system uses a laser diode and a photodetector to transmit and receive data, and can achieve data rates of up to 1 Mbps over distances of up to 100 meters.
- The article provides details on the hardware components and software required to build the system, and suggests potential applications such as indoor wireless networking, remote control, and sensor networks.