Need help with IRPD
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I have an IRPD hooked up to a basic stamp and it is acting very odd.
it regularly sees things that are not there, and doesn't see some
things that are. i have tried everything i can think of from
pointing it straight up to moving the leds. i have even put
electrical tape over the receiver and it still thinks it is
receiving. i have turned the sensitivity down as low as it goes, but
it is still erratic. any ideas?
thanks!! tom
it regularly sees things that are not there, and doesn't see some
things that are. i have tried everything i can think of from
pointing it straight up to moving the leds. i have even put
electrical tape over the receiver and it still thinks it is
receiving. i have turned the sensitivity down as low as it goes, but
it is still erratic. any ideas?
thanks!! tom
Comments
--Dan
Original Message
From: <tjwalton@u...>
To: <basicstamps@egroups.com>
Sent: Monday, December 04, 2000 6:39 AM
Subject: [noparse][[/noparse]basicstamps] Need help with IRPD
> I have an IRPD hooked up to a basic stamp and it is acting very odd.
> it regularly sees things that are not there, and doesn't see some
> things that are. i have tried everything i can think of from
> pointing it straight up to moving the leds. i have even put
> electrical tape over the receiver and it still thinks it is
> receiving. i have turned the sensitivity down as low as it goes, but
> it is still erratic. any ideas?
>
> thanks!! tom
>
>
>
>
>
>I have an IRPD hooked up to a basic stamp and it is acting very odd.
>it regularly sees things that are not there, and doesn't see some
>things that are. i have tried everything i can think of from
>pointing it straight up to moving the leds. i have even put
>electrical tape over the receiver and it still thinks it is
>receiving. i have turned the sensitivity down as low as it goes, but
>it is still erratic. any ideas?
>
>thanks!! tom
Hi Tom -
Let's start with which IRPD unit you are using. Then, perhaps, we can go on
from there ?
Regards,
Bruce Bates
though there is a place for an optional one right by the receiver on
the board. it is supposed to work with the Basic Stamp, there was
code, but no reference to actually using the resistor).
it is a Lynxmotion IRPD, purchased from MondoTronics.
--- In basicstamps@egroups.com, tjwalton@u... wrote:
> I have an IRPD hooked up to a basic stamp and it is acting very
odd.
> it regularly sees things that are not there, and doesn't see some
> things that are. i have tried everything i can think of from
> pointing it straight up to moving the leds. i have even put
> electrical tape over the receiver and it still thinks it is
> receiving. i have turned the sensitivity down as low as it goes,
but
> it is still erratic. any ideas?
>
> thanks!! tom
the detectors states (active or not active, I don't remember, but it doesnt
matter) the detector output was just left floating. The stamp had trouble
reading the state of the pin, so I had to use a pullup resistor to keep the
pin high while the pin would normally be floating.
--Dan
Original Message
From: <tjwalton@u...>
To: <basicstamps@egroups.com>
Sent: Monday, December 04, 2000 3:27 PM
Subject: [noparse][[/noparse]basicstamps] Re: Need help with IRPD
> i have not tried a pull up resistor(i don't know which or where,
> though there is a place for an optional one right by the receiver on
> the board. it is supposed to work with the Basic Stamp, there was
> code, but no reference to actually using the resistor).
>
> it is a Lynxmotion IRPD, purchased from MondoTronics.
>
>
>
> --- In basicstamps@egroups.com, tjwalton@u... wrote:
> > I have an IRPD hooked up to a basic stamp and it is acting very
> odd.
> > it regularly sees things that are not there, and doesn't see some
> > things that are. i have tried everything i can think of from
> > pointing it straight up to moving the leds. i have even put
> > electrical tape over the receiver and it still thinks it is
> > receiving. i have turned the sensitivity down as low as it goes,
> but
> > it is still erratic. any ideas?
> >
> > thanks!! tom
>
>
>
>
>
>i have not tried a pull up resistor(i don't know which or where,
>though there is a place for an optional one right by the receiver on
>the board. it is supposed to work with the Basic Stamp, there was
>code, but no reference to actually using the resistor).
>
>it is a Lynxmotion IRPD, purchased from MondoTronics.
>
>Hi again Tom et al -
After visiting the Lynxmotion web site, I found some interesting information !
There are "Tech Tips" on the Home page of the Lynxmotion web site
[noparse][[/noparse] http://www.lynxmotion.com/index.htm ] which indicate various
troubleshooting steps for IRPD sensors. My suggestion would be to perform
those steps, as indicated, and if they fail to bring any problem resolution
then contact the Lynxmotion tech support folks at : " tech@L... " .
At the end of that section there are also some comments about REPLACEMENT
PARTS that MAY be needed. Thus, there MAY BE problem INHERENT in the
circuitry itself, and NO AMOUNT of STAMP troubleshooting will provide an
appropriate answer.
If that all fails, please advise, and we can continue with the problem
determination here, but let's have Lynxmotion do their share firat, as any
vendor is usually willing to do.
Hope this starts you back to a successful path.
Regards,
Bruce Bates
>--- In basicstamps@egroups.com, tjwalton@u... wrote:
> > I have an IRPD hooked up to a basic stamp and it is acting very
>odd.
> > it regularly sees things that are not there, and doesn't see some
> > things that are. i have tried everything i can think of from
> > pointing it straight up to moving the leds. i have even put
> > electrical tape over the receiver and it still thinks it is
> > receiving. i have turned the sensitivity down as low as it goes,
>but
> > it is still erratic. any ideas?
> >
> > thanks!! tom