Grounding test (CB10092E)

This simple circuit for a common 110 V power grid was found in a 1980s American documentation. The circuit uses neon lamps as indicators.

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Inverter Electronic Switch (CB17099E)
We found this circuit in a 1997 documentation. Its purpose is to fan an inverter for fluorescent lamp...
DC DC Converter from 12 V to 33 V (CB1231E)
We find this circuit in a 1994 technical documentation. The circuit has a 12 V input and a 33 V...
Center Tap Simulation with Diodes (CB4140E)
In the figure we show how two diodes can be used to simulate the center tap of a push-pull driver step....