This transmitter power meter was found in the March 1999 issue of Electronics Now magazine. The circuit uses an analog indicator and does not require a power supply.
Capacitance to voltage converter (CB6075E) This Texas Instruments circuit can be used on a...
The signals from this circuit obtained from the 1965 Radio Shack documentation are picked up from...
Found in Popular Electronics from the 1980s, this circuit uses two operational amplifiers from...