Analog Output from the BS2 - Thank you

Archiver

Thank you for your help everyone, the PAK-V sounds perfect, provided
I can get one in the UK. It even shows an application using precisely
the TriColour LED that I am looking at.

I want to keep the physical circuitry as simple as possible, and on
Al Williams' website it shows this diagram:
http://webspace.xfluida.net/pwmtoanalog.jpg
as way of generating an analog voltage from 0v to 5v. Is this all
that is needed between the PAK-V and the LEDs?

BTW my end product is going to be something like this
http://webspace.xfluida.net/glowbes.jpg

Andrew

Archiver

Hi Andrew,

1) Yes, we ship to the UK.
2) You don't want to drive the LED with a variable voltage! Just let the
pulses go through the LED (with an appropriate limiting resistor). When the
pulses are at 100% the LEDs will be at full brightness. At 0% they will be
effectively dark. At 50% the LEDs will be at 1/2 brightness etc. The truth
is the LEDs will be flickering, but your eyes "integrate" the rapid pulses
so you see the light as dimmer.

Hope that helps.

Regards,

Al Williams
AWC
http://www.al-williams.com/awce


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Original Message

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> From: iamthesquidthing [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=x_DoVFE6q5CN4HT0MSKWAcWDPJM385yDB8ru5hHS2FpFSxp0920ElOMdLEnLFRK6LTPKaASceRNDDGM-]squidthing@x...[/url
> Sent: Tuesday, December 23, 2003 10:11 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Analog Output from the BS2 - Thank you
>
>
> Thank you for your help everyone, the PAK-V sounds perfect,
> provided I can get one in the UK. It even shows an
> application using precisely the TriColour LED that I am looking at.
>
> I want to keep the physical circuitry as simple as possible,
> and on Al Williams' website it shows this diagram:
> http://webspace.xfluida.net/pwmtoanalog.jpg
> as way of generating an analog voltage from 0v to 5v. Is this
> all that is needed between the PAK-V and the LEDs?
>
> BTW my end product is going to be something like this
> http://webspace.xfluida.net/glowbes.jpg
>
> Andrew
>
>
>
>
>
>
>
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