What Circuit Noise Looks Like — Ainslie Scope Baseline

506 views · Published 31 August 2009 · 10:00 · Indexed 20 September 2026

Channel: Aaron Murakami · 2009 · Science & Technology

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With the timer and battery disconnected, the Rosemary Ainslie circuit is filmed deliberately so the noise floor can be seen: 2.5 mV RMS and unable to reach a higher amplitude, put side by side with the running circuit for comparison. The shunt arithmetic is cross-checked against a meter, 30 mV across 0.25 ohms giving 0.12 A, with the ammeter agreeing to within a hundredth of an amp. The meter is then shown on several current scales.

Chapters
0:00 Ammeter checked against the shunt
2:42 Disconnected circuit recorded as noise
5:43 Meter behaviour at several scales

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Rosemary Ainslie COP 17 circuit, 2009 bench footage. Posted 2009-08-31.

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