Schmitt trigger with programmable hysteresis (CB10111E)

This circuit was found in an American documentation from the 70s. The operational amplifier is from that time. Modern equivalents can be used.

| Clique na imagem para ampliar |

Contactless car ignition (CB6393E)
This circuit was obtained from 1967 documentation. It uses a sensor to determine the trigger...
Light controller (CB7049E)
Found in an old Popular Electronics this circuit can also be adapted to be used as a shield. In...
TTL Counter Modulus (CB895E)
This one-digit TTL modulus for 7-segment display can be parto f digital projects. Many of them can be...