[Noisebridge-discuss] LED Calculations help
Phil Spitler
phil at bonfirelabs.com
Mon May 21 20:15:20 UTC 2012
Great, thanks.
This is exactly what I need.
Thanks.
Phil
Phil Spitler | Associate Creative Director | Bonfire Labs | t : 415.394.8200 | c : 415.571.3139 | Bonfirelabs.com
"Get Social" - http://www.facebook.com/bonfirelabs
On May 21, 2012, at 5:22 AM, Nicholas Granado wrote:
> hi phil,
>
> that link states that the forward voltage is rated @ 3.4 volts with a 20ma draw; however they can be powered at 3.0 volts with approx. 10ma draw.
>
> nick
>
>
>
> On Sun, May 20, 2012 at 10:16 PM, Phil Spitler <phil at bonfirelabs.com> wrote:
> Hi,
> For simple LED projects, I usually use an online LED calculator to get the values for the needed resistors.
>
> I have just ordered some LEDs online but the specifications don't list the forward voltage, just the current draw.
>
> http://www.adafruit.com/products/679
>
> How would I figure out how to power the LEDs and what resistors to use?
>
> I am thinking of using 10 LEDs and having them all powered, all the time.
>
> I would love to know how to calculate my needs.
>
> Any ideas?
>
> Cheers.
>
> Phil
>
>
>
> Phil Spitler | Associate Creative Director | Bonfire Labs | t : 415.394.8200 | c : 415.571.3139 | Bonfirelabs.com
>
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