Battery charger (CB9121E)

Found in an Electronics Now from the 1980s, this circuit uses some components that are still common today. For others, equivalents can be tested.

| Clique na imagem para ampliar |

VCO with a Frequency Range of 100: 1 (CB1545E )
We find this circuit in a documentation for engineers from 1971. The circuit generates rectangular and...
High Q Filter (CB25362E)
This 1/2 hertz high selectivity filter was found in the December 1990 issue of Radio Electronics...
High Resistance Adapter (CB24718E)
Connected to the low current input of a standard multimeter, this circuit enables the reading of...