adc with sharp gp2d120 output
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I wasn't very clear at all regarding my intentions with the
range-finder. It has an analog output between 2.2V and 5.5V (I think.)
I'd be perfectly happy using it as a boolean if I could trigger a
response at a given voltage between those values.
Can something be rigged together using rctime? I was looking at
http://www.emesystems.com/BS2rct.htm
and thought this was promising for a solution not requiring another
chip purchase. Specifically, the section "Measuring small voltages
with RCtime" looks good but I'm still wading through the unfamiliar
terminology (I'm a genetics/biostats person in real-life, always shied
away from electronics, maybe to spite myself?) and am unable to tell
if it is not possible a dead-end for my needs.
p.s. I found a link to that site plowing my way through Yahoo's
mediocre archive to this very informative group. Y'all are a fun read.
range-finder. It has an analog output between 2.2V and 5.5V (I think.)
I'd be perfectly happy using it as a boolean if I could trigger a
response at a given voltage between those values.
Can something be rigged together using rctime? I was looking at
http://www.emesystems.com/BS2rct.htm
and thought this was promising for a solution not requiring another
chip purchase. Specifically, the section "Measuring small voltages
with RCtime" looks good but I'm still wading through the unfamiliar
terminology (I'm a genetics/biostats person in real-life, always shied
away from electronics, maybe to spite myself?) and am unable to tell
if it is not possible a dead-end for my needs.
p.s. I found a link to that site plowing my way through Yahoo's
mediocre archive to this very informative group. Y'all are a fun read.
Comments
pins on the STAMP need the voltage to be around 1 volt before it reads a
high (I think). Because of this, RC will only work within a limited
rage. When I tried it, I could only get a reading within 3 to 4 inches,
which is not totally useless. You'd do better using a GP2D02, which has
a digital output and is only a little more expensive, or a GP2D15 which
has a on/off output if there is an object in it's range.
chris in napa
Carolus Magnus wrote:
>I wasn't very clear at all regarding my intentions with the
>range-finder. It has an analog output between 2.2V and 5.5V (I think.)
>
>I'd be perfectly happy using it as a boolean if I could trigger a
>response at a given voltage between those values.
>
>Can something be rigged together using rctime? I was looking at
>
>http://www.emesystems.com/BS2rct.htm
>
>and thought this was promising for a solution not requiring another
>chip purchase. Specifically, the section "Measuring small voltages
>with RCtime" looks good but I'm still wading through the unfamiliar
>terminology (I'm a genetics/biostats person in real-life, always shied
>away from electronics, maybe to spite myself?) and am unable to tell
>if it is not possible a dead-end for my needs.
>
>p.s. I found a link to that site plowing my way through Yahoo's
>mediocre archive to this very informative group. Y'all are a fun read.
>
>
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I'm commited to the gp2d12 (in that I've already bought them) and I
think in the long run I can get more out of them. I looked at some
adc's, TI has the tlv1549C which allows you to set the range using
ref+/ref- inputs. It appears to be what I'm looking for.
I have no idea if it works, though.
Yours,
CM
--- In basicstamps@yahoogroups.com, Chris Burns <mwalimu@s...> wrote:
> The Sharp familly of IR rangers returns a signal of .5 to 3v. The I/O
> pins on the STAMP need the voltage to be around 1 volt before it
reads a
> high (I think). Because of this, RC will only work within a limited
> rage. When I tried it, I could only get a reading within 3 to 4
inches,
> which is not totally useless. You'd do better using a GP2D02, which
has
> a digital output and is only a little more expensive, or a GP2D15 which
> has a on/off output if there is an object in it's range.
>
> chris in napa
>
> Carolus Magnus wrote:
>
> >I wasn't very clear at all regarding my intentions with the
> >range-finder. It has an analog output between 2.2V and 5.5V (I think.)
> >
> >I'd be perfectly happy using it as a boolean if I could trigger a
> >response at a given voltage between those values.
> >
> >Can something be rigged together using rctime? I was looking at
> >
> >http://www.emesystems.com/BS2rct.htm
> >
> >and thought this was promising for a solution not requiring another
> >chip purchase. Specifically, the section "Measuring small voltages
> >with RCtime" looks good but I'm still wading through the unfamiliar
> >terminology (I'm a genetics/biostats person in real-life, always shied
> >away from electronics, maybe to spite myself?) and am unable to tell
> >if it is not possible a dead-end for my needs.
> >
> >p.s. I found a link to that site plowing my way through Yahoo's
> >mediocre archive to this very informative group. Y'all are a fun read.
> >
> >
> >To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> >from the same email address that you subscribed. Text in the
Subject and Body of the message will be ignored.
> >
> >
> >Yahoo! Groups Links
> >
> >To visit your group on the web, go to:
> > http://groups.yahoo.com/group/basicstamps/
> >
> >To unsubscribe from this group, send an email to:
> > basicstamps-unsubscribe@yahoogroups.com
> >
> >Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> >