POWER_FAILURE

Published:2009/7/9 23:06:00 Author:May | From:SeekIC

Current of 0.5 ma through R4 holds scr Q1 on normcdly. After power failure, scr will not fire again because it has no gate current. tine voltage across scr then makes neon relaxation oscillctor fiash warning signcal. Depressing S1 resets drcuit.-R.K. Honeycuff, SCR Monitors Electronics, 38:15, p 63.



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