Time base (CB8933E)

This circuit can generate time base signals from 5 to 1500 Hz. We find it in a documentation about old neon lamps.

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Sinusoidal to Square Converter (CB12820E)
This circuit, from a publication in the 1970s, uses transistors that no longer exist, but can be...
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This circuit tests the earth connection in computer outlets and other equipment that requires this...
Gain 100 Operational Amplifier 741 (MSB018E)
The gain of the Operational Amplifier in the figure is given by the ratio between R1 and R2. In...