On 10/17/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
> I'm sorry to keep asking hardware questions on the owfs-software-dev list,
> but I don't know where else to ask these things.
>
Hardware questions are fine. Encouraged, even.
-
Hi,
[EMAIL PROTECTED]:
> Why do all (that I've found) light-measuring circuits based on the DS2438
> use reverse-biased photodiodes, rather than, say, a photoresistor?
I've tried that. Turns out that the typical photoresistor has too large
a resistance range, so you have a choice between "no diff
On Wed, 17 Oct 2007 [EMAIL PROTECTED] wrote:
> Why do all (that I've found) light-measuring circuits based on the DS2438
> use reverse-biased photodiodes, rather than, say, a photoresistor? Either
> way you could have a fixed sense resistor between the Vs+ and Vs-
> terminals.
No idea, but I jus
I'm sorry to keep asking hardware questions on the owfs-software-dev list,
but I don't know where else to ask these things.
Why do all (that I've found) light-measuring circuits based on the DS2438
use reverse-biased photodiodes, rather than, say, a photoresistor? Either
way you could have a fixe
