We found this circuit in the January 1979 issue of Radio Electronics magazine. Components are still common today, with the 7106 display driver standing out.
For an operation with extremely low consumption, generating an audio tone, we can use the circuit of...
Using a 741 operational this circuit was found in the August 1993 Electronics Now magazine. The...
This circuit measures the RF power of oscillators and small transmitters in the range of 0.05 to...