Signal

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This circuit is rich in harmonics and is ideal for testing amplifier circuits. To find a fault in an amplifier, connect the earth clip to the 0v rail ...

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This circuit consumes no current when the probe is not touching any circuitry. The reason is the voltage across the green LED, the base-emitter juncti...

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The Phaseshift Oscillator is characterised by 3 high-pass filters, creating a 180° phase shift. The output is a sinewave. Take care not to load the o...

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This circuit allows a class-A amplifier to drive a low impedance speaker and has a low quiescent current. The 220R in series with the speaker limits t...

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This circuit produces a sinewave and each phase can be tapped at the point shown....

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