What is the purpose of the small connector on an HDMI cable?
you've probably noticed it before – a small cylindrical object surrounding the connector of an hdmi cable. most people will ignore it and use the cable for its original purpose,
Tags : electromagnetic interference
What effect does the black bureau on the laptop charger cord have?
near the end of the laptop charging cord there is a black cylinder called a ferrite bead, which is responsible for blocking electromagnetic interference from a device and to a