This circuit was taken from old American documentation. With it, it is possible to generate pulses like a Schmitt trigger, but using a tunnel diode.
This repellent operates with frequencies from 30 to 45 kHz, serving for insects and rodents. The...
We found this preamplifier with 70 dB gain for microphones in American documentation from the...
This circuit can be used in measurement bridges. We found it in the September 1995 Electronics Now magazine....