Bipolar Current Level Detector (CB6629E)

The circuit shown was found in an American documentation from 1964. The circuit uses transistors of the time and the indicators are small lamps.

| Clique na imagem para ampliar |

100 Hz Fourth Order High Pass Filter (CB25819E)
This circuit was taken from an article in Electronics Now magazine in February 1995. The power...
Bistable relay (CB7159E)
Found in a Hands On Electronics from the 80's, this circuit activates a relay with alternating...
NPN and PNP Transistor Power Switch (CB992E)
This circuit was found in a publication of the year 1968. It uses complementary transistor to...