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 |

Ice Alert and Lights On (CB4965E)
This circuit for vehicular use is from an 80's American publication. The circuit has a light...
Different Voltage for 3 Terminals Regulator (CB13049E)
You can change the output voltage of a fixed 3-terminal regulator using a zener diode. The voltage of...
Electronic Fuse (CB10347E)
This circuit was found on a Radio Elettronica (Italy) from April 1974. The circuit can still be...