Found in Radio Electronics from the 90s, this circuit has several outputs with different pulse times. The circuit is CMOS and can be powered by voltages from 5 to 15 V.
This circuit was found in a 1962 publication. At the time there were high voltage batteries like the...
In the figure we have the way to use a voltage comparator powered by a voltage to control a...
This circuit is from a July 1970 Radio Electronics magazine. The sensors are metal probes. The 18 V...