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Old 10th Oct 2019, 6:31 am   #69
julie_m
Dekatron
 
Join Date: May 2008
Location: Derby, UK.
Posts: 7,735
Default Re: Your first experience with LEDs?

I've seen cassette decks where one bargraph driver IC was multiplexed to drive two rows of LEDs alternately.

The design confused me at first, because there did not seem to be an oscillator controlling the switching, nor any transistors that looked good for the full current .....
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