Refrigerator Monitor (CB26012E)

This circuit that detects when the refrigerator is not working properly was found in the February 1997 Electronics Now magazine.

| Clique na imagem para ampliar |

Simple Power Supplies (CB20187E)
In the figure below we have the main configurations of power supplies with the most used...
Power Supply for HeNe LASER (CB21005E)
This circuit is a high voltage source for a gas LASER. We found it in a documentation from the...
Amplifier MFC9010 (CB20027E)
This integrated amplifier was used in televisions from the 70s, with good sensitivity...