About: http://webisa.webdatacommons.org/338569624

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The innards are a relay and some clever wiring. (No capacitors, inverters or other electronics.) When activated, the circuit closes, activating the magnet in the relay.
http://www.w3.org/ns/prov#wasQuotedFrom	boingboing.net