Unit gain (CB6727E)

This circuit was obtained from an Electronics World of 1969. General-purpose transistors can be used in this configuration.

| Clique na imagem para ampliar |

Telephone Tone Generator (CB13935E)
This double tone generator uses a specific integrated circuit, having been found in a 1977 CMOS...
Simple Transistor Test (CB17139E)
This circuit is used to test PNP or NPN transistors giving the status indication through LEDs. The...
Dimmer (CB5270E)
This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit...