SMALLEST_PHASE_CONTROL

Published:2009/7/20 6:32:00 Author:Jessie | From:SeekIC

Miniature lamp No. 2128 with small, low-mass filament can reach firing level of light-activated scr in about three cycles with low applied voltage. As applied voltage is increased, this time is reduced to about 1 millisec when lamp is directed across LASCR terminals, thus providing phase control. Lamp voltage is removed when LASCR fires, protecting lamp and resetting it for next half-cycle. Useful for dimming 25-w lamp or for controlling temperature of small soldering iron.- Silicon Controlled Rectifier Manual, Third Edition, General Electric Co., 1964, p 213.



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