12 V output for 5 V regulators (CB20681E)

Found in an Electronic Design of the 90's, this circuit provides an additional 12 V output to a 5 V regulator. The maximum current is 200 mA.

| Clique na imagem para ampliar |

Light Controlled Power Switch (CB12286E)
In this circuit of a 1991 publication, we can use the 2N2646 unijunction transistor and the sensor...
General Purpose Meter (CB23574E)
Measuring capacitances and resistance this simple instrument was found in Radio Electronics...
Metal detector (CB7959E)
Found in a 90’s 303 Circuits, this circuit uses components that are still common and has a common...