Position: Index > Lock Circuit >

12_V_AUTO_CLOCK

2017-01-08 19:14  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


12_V_AUTO_CLOCK
National MA1003 automotive/instrument clock module combines MM5377 MOS LSI clock with 4-digit 0.3-inch green vacuum fluorescent display,2.097-MHz crystal, and discrete components on single printed-circuit board to give complete digital clock. Brightness control logic blanks display when ignition is off, reduces brightness to 33% when parking or headlight lamps are on, and follows dash-lamp dimming control setting.Display has leading- zero blanking. For portable applications, display can be activated by closing display switch momentarily,- MOS/LSI Data-book, National Semiconductor, Santa Clara, CA, 1977, p 13-8-13-10.