This circuit serves as an audio output for AM or even FM radios and was found in a Radio Electronics magazine from March 1990. Note the supply voltages.
November 2016 - The new Ohmite TO-126 power resistors in the range of 0.09 Ω to 51 kΩ with...
Other CMOS gates can be used in this sensor, which we found in the July 1995 Electronic Now...
We found this circuit in a 1965 Electronic Design. Transistors are still common but admit...