Most often ultrasonic transducers are used for distance measurements, and in the DIY world, usually as a way for robots to detect obstacles. But for a weekend project, [Vinod.S] took the ultrasonic ...

For those building their own remote controlled devices like RC boats and quadcopter drones, having a good transmitter-receiver setup is a significant factor in the eventual usability of their build.

It is possible to switch between 'Transmitter mode' which can play music simultaneously with up to two Bluetooth speakers, and 'Receiver mode' which can receive voice of up to two Bluetooth-compatible ...