This circuit oscillates in the fifth harmonic of the crystal frequency. The circuit is from a 90's documentation. L1 must be according to the desired frequency.
This circuit is from a documentation for amateurs from 1978. The circuit both analyzes logical...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This is one of the many versions of this type of indicator that the reader can find on our...