Ainslie Circuit Slows When You Touch It

294 views · Published 14 August 2009 · 9:52 · Indexed 20 September 2026

Channel: Aaron Murakami · 2009 · Science & Technology

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The Rosemary Ainslie circuit is run in aperiodic flop mode charging a second battery through a diode, with the input battery at 12.33 V while the charge battery climbs to 13.70 V. Placing a hand on the inductive resistor and then on the MOSFET visibly slows the pulse rate; releasing it, the circuit settles into a rhythm clocked on camera at about 55 beats a minute. The effect is described as hand capacitance loading the circuit.

Chapters
0:00 Aperiodic wobble on the charging trace
2:58 Long and short burst intervals
6:01 Hand on the coil slows the pulses

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Rosemary Ainslie COP 17 circuit, 2009 bench footage. Posted 2009-08-14.

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