Can be used as a shield, this old American documentation circuit offers digitally selected attenuation values from 1 to 0.0001. The component used is uncommon today.
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....