HELMET_LAMP_DIMMER

Published:2009/7/12 22:43:00 Author:May | From:SeekIC

Provides lossless variation in brightness of incandescent lamp by using duty-cycle modulation. All three sections of 4025 triple three-input NOR gate turn lamp on and off rapidly at rate determined by setting of brightness control pot in astable MVBR circuit, Output transistor rating must be sufficient to handle lamp current.-D. Lancaster, CMOS Cookbook, Howard W. Sams, Indianapolig, IN, 1977,p 231.



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