Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitter and receiver. The IR music transmitter ...

Most consumer remote controls operate using infrared light. This works well assuming the piece of equipment has a line of sight to the remote. But if you have, say a receiver in a cabinet or closet, ...

Wireless charging has liberated some users from requiring cords and outlets, but the technology comes with limits, as devices must be within close proximity to RF-based or magnetic-induction wireless ...