About: http://webisa.webdatacommons.org/440144211

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	When an electrical digital drive signal is present, Q2 is turned on, pulling its collector positive to a voltage such as to forward bias the LED with a drive current determined by Q1 and the 10 ohm resistor.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com