Schmitt Trigger 7400 (CB22419E)

This low hysteresis circuit was obtained from old documentation. The circuit must be powered by a voltage of 5 V.

Short Circuit Protection for the Bench (CB3821E)
This circuit uses a contactor having been found in a 1987 publication. More modern equivalent...
Window Comparator I (CB24973E)
Using the CA3140 in the figure we have a comparator that goes low in the window voltage space. The...
Colpitts Crystal Oscillator (CB19355E)
The crystal used in this oscillator can have frequencies up to 30 MHz or more, depending on the...