This is the analog part of the previous circuit with the pressure sensor for the altimeter. The circuit is from a Radio Electronics from October 1990.
September 2016 - can be purchased from Mouser Electronics the new transceivers MAX348x and MAX349x from...
This egg timer has been found in an English magazine that no longer exists in 1982. The...
This doorbell or buzzer as announced in a 1990s US publication uses an operational amplifier that admits...