This circuit is an alternative to the previous circuit. We found it in the same article in the Radio Electronics magazine of March 1992. The integrated circuits are the LM3914.
The purpose of this circuit is to add millivolt scales to a common multimeter. Used transistors are...
This circuit for the AM band with two transistors was found in the June 1960 Radio Electronics magazine....
The circuit in the figure is suggested by Texas Instruments to trigger a sensitive SCR from a...