and in the DIY world, usually as a way for robots to detect obstacles. But for a weekend project, [Vinod.S] took the ultrasonic transmitter and receiver from a distance-meter module and used ...

After flying and crashing a cheap FPV drone for a bit, [GreatScott] decided to try his hand at building his own video transmitter ... image on his video receiver goggles. In an attempt to confirm ...