Using a dual 555 CMOS this very useful circuit on the bench was found in the July 1998 Electronics Now magazine. The circuit is battery powered.
This circuit uses a common diode to switch a high frequency signal. The circuit was found in the...
Suggested by an American publication of 1964 this circuit is intended for the capture of signals...
This complete single cell protection system is suggested by Linear Technology in its 2005 manual....