This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no constructive data for the transformer used in the output.
This circuit was obtained in a 1979 English magazine. This circuit is a treble filter that,...
Using the ICM7556, dual CMOS version of the 555, this circuit generates triangular signals from 1 to...
We found this FM transmitter circuit with the 2N2218 transistor in a documentation from the 90s....