Re: LM3914 --help :/

Spehro Pefhany <speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx> writes:

> On 02 Dec 2005 16:44:24 +0000, the renowned John Devereux
> <jdREMOVE@xxxxxxxxxxxxxxxxxx> wrote:


> >However, looking at the block diagram more closely, it appears that
> >the "load" on the reference also determines the LED brightness. So
> >presumably injecting a current into it switches the leds off!
>
> Yes, there's a 10:1 current mirror thing going on with the comparator
> outputs vis-a-vis the reference output current.
>
> But why the 100 ohm resistor?

I guess it drives the capacitor with the full 5V instead of 3V or so?


--

John Devereux
.