This old two-stage video amplifier uses integrated circuits that are not easily obtainable today. The circuit is for analog video and was found in an American 1980s documentation.
This circuit was found in American documentation from the 1960s. The operational amplifier is from that...
This two-door doorbell was found in a 1990s US publication. The circuit is still current as...
This circuit is from a National Semiconductor manual, appearing elsewhere on this site. The...