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.
With calibrated RV1 it is possible to find a zener diode voltage. The integrated circuit is 0 741...
With a touch of the sensor, the SCR fires and keeps the lamp on. To deactivate the circuit, it is...
We found this circuit in an old documentation for radio amateurs. The circuit uses an analog...