Found in an Electronic Design from the 90's, this circuit indicates three voltage levels by activating the LED in 3 modes: off, flashing and on for high voltage.
This circuit was found in a Popular Electronics from the 90s. The components used are all common...
This circuit is from a 60's documentation. The circuit uses components from the era and serves to...
One pulse in the output is produce at each 5 pulses applied to the input. The circuit uses CMOS...