In electrical and electronic engineering, a daisy chain is a wiring scheme in which multiple devices are wired together in sequence or in a ring, similar to a garland of daisy flowers. Other than a full, single loop, systems that contain internal loops cannot be called daisy chains.
Daisy chains may be used for power, analog signals, digital data, or a combination thereof.
The term daisy chain may refer to either large scale devices connected in series, such as a series of power strips plugged into each other to form a single long line of strips or to the wiring patterns embedded inside of devices. Other examples of devices that can be used to form daisy chains are those based on USB, FireWire, Thunderbolt, and Ethernet cables.