12 V Power Supply (CB24505E)

To power small projects, we found this circuit in the Radio Electronics magazine of May 1977. The transistor must be equipped with a heat sink.

| Clique na imagem para ampliar |

220 V Line Protector (CB17700E)
This line protector circuit was found in a 2002 documentation, but it is totally current and...
Radiolocation antenna (CB6531E)
This antenna for the frequencies 146 or 440 MHz was found in a magazine 73 for Amateur Radio of...
13 V x 1 A using the 7812 (CB1506E )
With this circuit it is possible to increase the output voltage of a 7812 regulator. The circuit...