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30 led light from chip output ??

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shohag49

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using the logical high ouput of a regular chip, what would be the best way to light 30 led's connected in series??
 

bogdanfirst

New Member
you can use a darlington transistor or 2 transistors to drive the leds. i assume that you have a small voltage power suply for the electronics and a highter voltage power suply(40-50 volts) for the 20 leds in series?
 
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