TOUCH_CONTROLLED_SWITCH

Published:2009/7/16 5:48:00 Author:Jessie | From:SeekIC

Normal 30 to 100-pf capacitance of human body turns lamp on and off. Touching on antenna loads high-impedance network, reducing neon-lamp oscillator voltage below level required for firing four-layer pnpn germanium alloy transistor, and current that was shunted to ground through transistor now operates relay, turning on lamp. Touching off antenna reverses all conditions. -S. B. Gray, Home and Auto Controls, Electronics, 36:19, p 52-66.



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