This circuit with pressure sensor was obtained from the Encyclopedia of Electronic Circuits volume 5 of 1995. Note the construction of the sensor with rubber and conductors.
From a 90s Popular Electronics, this circuit emits pulsating signals for different types of...
Found in a 90s ARRL Handbook, this circuit is intended for the production of signals in the side...
This amplifier uses Sanken hybrid modules that can still be found in some suppliers, as they are...