Transistor gain meter (CB20522E)

This circuit was found in a publication in the 1950s, mainly applying to germanium transistors of the time.

Rhythmic Light with Triac (CB16324E)
This project was obtained in a 1982 publication, and depending on the triac used, it can control...
250 Hz Low Pass Filter (CB13602E)
This third-order filter was found in a 1975 publication. The circuit must be powered by a...
Wien Bridge Generator (CB39010E)
This sophisticated sinusoidal audio signal generator uses a Wien bridge configuration with an...