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From: Jeffrey Warren <jeff@publiclab.org>
Date: Tue, 30 Apr 2019 18:59:21 -0400
Message-ID: <CAGqfm_D0UHi28M=uFZCnRiiLhdkJeqSNbRpzrWNL0_EQ=qFJGQ@mail.gmail.com>
Subject: Re: New comment on Can someone clarify the colors on the simple air sensor? (turning white when plugged in) (#19173)
To: notifications@publiclab.org
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thanks, Chris, i haven't seen any LEDs burn out yet, and we've been running
them for weeks in some cases. If they do, i'll definitely add in a
resistor.
On Mon, Apr 29, 2019 at 11:20 PM <notifications@publiclab.org> wrote:
> Hi! There's been a response to a discussion you're involved in. You can
> reply to this email or visit this link:
>
>
> https://publiclab.org/questions/stevie/04-26-2019/can-someone-clarify-the-colors-on-the-simple-air-sensor#answer-0-comment-24002
>
> *cfastie <https://publiclab.org/profile/cfastie> wrote:*
> ------------------------------
>
> According to the link at your wiki the RGB LEDs are rated for 2 to 3.2
> volts. Your instructions for connecting the LED indicate connecting the LED
> to 5 volts on the Arduino Nano. I'm not sure why the LEDs don't burn out
> rather quickly when powered with 5 volts. Maybe you are doing something in
> the sketch to limit the current. The LEDs apparently come with resistors
> which could be used to limit the current so the LEDs do not burn out, but
> these resistors are apparently not included in your kits. The Arduino Nano
> has a 3.3 volt pin which could be used instead of the 5 volt pin. Using
> that pin might protect the LEDs, but using one of the resistors on the
> ground pin of the LED might also be a good idea. Chris
> ------------------------------
>
> Look like spam? Mark this as Spam
> <https://publiclab.org/admin/mark_comment_spam/24002>
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> Reply at:
> https://publiclab.org/questions/stevie/04-26-2019/can-someone-clarify-the-colors-on-the-simple-air-sensor#answer-0-comment
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<div dir=3D"ltr">thanks, Chris, i haven&#39;t seen any LEDs burn out yet, a=
nd we&#39;ve been running them for weeks in some cases. If they do, i&#39;l=
l definitely add in a resistor.=C2=A0</div><br><div class=3D"gmail_quote"><=
div dir=3D"ltr" class=3D"gmail_attr">On Mon, Apr 29, 2019 at 11:20 PM &lt;<=
a href=3D"mailto:notifications@publiclab.org">notifications@publiclab.org</=
a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi=
! There&#39;s been a response to a discussion you&#39;re involved in. You c=
an reply to this email or visit this link:
<p><a href=3D"https://publiclab.org/questions/stevie/04-26-2019/can-someone=
-clarify-the-colors-on-the-simple-air-sensor#answer-0-comment-24002" target=
=3D"_blank">https://publiclab.org/questions/stevie/04-26-2019/can-someone-c=
larify-the-colors-on-the-simple-air-sensor#answer-0-comment-24002</a></p>
<p><b><a href=3D"https://publiclab.org/profile/cfastie" target=3D"_blank">c=
fastie</a> wrote:</b></p>
<hr>=20
<p>According to the link at your wiki the RGB LEDs are rated for 2 to 3.2 v=
olts. Your instructions for connecting the LED indicate connecting the LED =
to 5 volts on the Arduino Nano. I&#39;m not sure why the LEDs don&#39;t bur=
n out rather quickly when powered with 5 volts. Maybe you are doing somethi=
ng in the sketch to limit the current. The LEDs apparently come with resist=
ors which could be used to limit the current so the LEDs do not burn out, b=
ut these resistors are apparently not included in your kits.
The Arduino Nano has a 3.3 volt pin which could be used instead of the 5 vo=
lt pin. Using that pin might protect the LEDs, but using one of the resisto=
rs on the ground pin of the LED might also be a good idea.
Chris
</p>
<hr>
<p>Look like spam?
Mark this as <a href=3D"https://publiclab.org/admin/mark_comment_spam/2=
4002" target=3D"_blank">Spam</a>
</p>
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<p>Reply at: <a href=3D"https://publiclab.org/questions/stevie/04-26-2019/c=
an-someone-clarify-the-colors-on-the-simple-air-sensor#answer-0-comment" ta=
rget=3D"_blank">https://publiclab.org/questions/stevie/04-26-2019/can-someo=
ne-clarify-the-colors-on-the-simple-air-sensor#answer-0-comment</a></p>
<p>Report abuse to: <a href=3D"mailto:moderators@publiclab.org" target=3D"_=
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