This circuit, found in 1993 documentation, is the traditional relaxation oscillator configuration with unijunction transistor. The frequency depends on C and the resistance value R.
This application of the RCA integrated circuit released at the time was found in the August 1970...
These basic filters, the second one being operational, were published in the November 1973 issue of...
This circuit adds the voltage from the secondary of a transformer to an outlet connected to the...