Differential Amplifier (CB6546E)

This circuit was found in an American publication from 1968. The transistors are from the time, but it can be made from modern transistors.

| Clique na imagem para ampliar |

Visual Voltage Alert (CB18804E)
This circuit visually indicates that a high voltage is present in an outlet or other point. The...
Timed Sequential Controller (CB4453E)
This circuit found in a 1988 documentation consists of a timer or sequential timer controller. The...
Ladder Generator (CB21245E)
Using a 4017 as a base, this circuit from a 1990s Popular Electronics generates low-frequency...