This circuit was found in the November 1974 Radio Electronics magazine. The voltage depends on the supply and the timings of R1 and R2 as well as C1 and C2.
This circuit was found in a RCA documentation from 1977. The integrated circuit is uncommon today. It is...
We found this circuit in a 1995 documentation. It can measure frequencies from 100 kHz to over 100 MHz...
This circuit was obtained in a Popular Electronics of the 90s. The circuit is compatible with...