At 11:54 PM 3/13/2004 +0000, you wrote:

>I've never come across these drivers before (like I said, I'm fairly
>new to electronics really) so I'll look into them. I just did a
>quick google but didn't find much - if anyone has any links to
>simple example circuits using them I would be grateful.

http://www.allegromicro.com  and Toshiba should have some. This kind is a
"source driver" that sources current (current flows *out* of the output
pins, and through the load etc. to ground).

> > If you need super brightness, then a cheap ULN2803 will switch
> > the segments and you can go up to much higher currents per
> > segment (maybe 20-25mA average- daylight visible with the right
> > filter).
>
>So is the ULN2803 one of the things that you refer to as drivers
>above? Or is that something different?

The ULN2803 is a "sink driver", current flows from Vdd though the load etc.
into the output pin.

http://www.nelnick.com/datasheets/ULN2803-D.pdf

>Thanks for your help, I appreciate it.

No problem.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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