Electronic Morse Key (CB7313E)

This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are current and the transistor is of general use.

| Clique na imagem para ampliar |

Infrared Detector (CB1560E )
The circuit shown in the figure can be used to detect the operation of infrared sources whose...
Sampling and Retention (CB20151E)
This circuit is from a factory manual from the 80s. The circuit can be implemented with more...
Logic Drive of the 7805 (CB25236E)
This circuit for the logic control of the 555 in a power supply was found in the October 1989...