rebeltaz 36 Posted October 12, 2014 Share Posted October 12, 2014 I am building a(nother) clock with a custom 7-segment display. Each "segment" will be made up of two high brightness LEDs. The LEDs I am looking to use right now are blue (although I may use white) with a voltage rating of 3.2-3.8v and 35mA maximum continuous current and 70mA peak current. The two LEDs will be driven in series with the segments wired in common-anode configuration. If I power the 7447 with 9v, do you think it would be able to drive the display alone, or should I buffer that with a ULN2003? I tend to try and over-engineer things, so I wanted to get a second opinion before I finalized the design. thanks guys -- Sorry... I meant 7447 in the subject line, not 7448. Quote Link to post Share on other sites
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