# 7 segment Led volts

**URL:** <https://community.sparkfun.com/t/7-segment-led-volts/19354>\
**Category:** Arduino\
**Created:** [February 8, 2011, 10:04pm UTC](https://community.sparkfun.com/t/7-segment-led-volts/19354 "2011-02-08T22:04:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mbrown9412](https://avatars.discourse-cdn.com/v4/letter/m/a183cd/32.png) [@mbrown9412](https://community.sparkfun.com/u/mbrown9412)\
**Post date:** [February 8, 2011, 10:04pm UTC](https://community.sparkfun.com/t/7-segment-led-volts/19354/1 "2011-02-08T22:04:31Z")

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I want to get some of these 7 segment leds for a clock: [http://www.sparkfun.com/products/8530](http://www.sparkfun.com/products/8530)

they say the maximum is 12.4v

I’d like to be able to plug it into a wall, with the 12v wall adapter. it says it is regulated, and be no more than 14v!

does this mean it will burn out the leds?

I don’t really want to take the chance, seeing as how they are 15 dollars a piece.

anybody have any idea?

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**Author:** ![esklar81](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@esklar81](https://community.sparkfun.com/u/esklar81)\
**Post date:** [February 9, 2011, 5:59am UTC](https://community.sparkfun.com/t/7-segment-led-volts/19354/2 "2011-02-09T05:59:46Z")

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It’s late; I’m tired; my brain isn’t working at full speed, but… I have this vague recollection that there are devices that make a voltage more regular. If only I could recall what they’re called…

This is also an opportunity to apply current-limiting resistors.

Eric