20 to 20 kHz generator (CB9240E)

This rectangular signal generator was found in an Electronics World of 1966. The transistors are from that time and modern equivalents can be tested.

| Clique na imagem para ampliar |

110 or 220 V 1 W Amplifier (CB12873E)
This circuit uses high voltage transistors to provide direct power from the 110 V power grid or a...
HeNe Laser power Supply (CB7838E)
This power source for Gas Laser was obtained in a 90’s Electronic Design. The circuit uses a...
13 V x 2 A power supply (CB13632E)
This circuit is from an old documentation but can be implemented with a BD136 for Q1 and 2N3055 for...