This circuit was obtained from Motorola documentation from 1969. The setting applies to other operating systems, including lower supply voltages. The zener determines the output signal.
A configuration using three of the four voltage comparators on the LM339 is shown in the figure and...
The maximum current of this circuit is 200mA, and the ripple is only 50 mV. The circuit is...
This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the...