Hamamatsu P5587 photoreflector - solved
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Posts: 46,084
Got this one - the light in my test environment was too bright.
Rafe
>
Original Message
> From: Rafe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mcIE_VMAyltVLI1md-V1Mg87czs1nYkQzULisXtSX9o385OEN-kYu7O5W7w-8pEiXXng2oOPeJdyuvA]rafe00@e...[/url
> Sent: Friday, October 12, 2001 6:09 PM
> To: Basicstamps@Yahoogroups. Com
> Subject: [noparse][[/noparse]basicstamps] Hamamatsu P5587 photoreflector
>
>
> Just in case someone has some extra time on their hands . . .
>
>
> I am having trouble with the Hamamatsu P5587 photoreflector.
>
>
> My setup:
>
>
> Ground +5V S
> | |--R1--|
> | | |
> |--C --|---| |
> |-- | R2 |
> | | | | |
> |
|
> |1 4 5 2 3 |
> | Photoflector |
>
>
>
> R1 = 6.8K Ohms
> R2 = 470 Ohms (tried 680 Ohms first)
> C = .1uF
>
> It is hard to see, but pin 4 is connected to ground.
>
> The problem is that S always stays high with or without anything
> if front of
> the reflector. What am I doing wrong here?
>
> Rafe
>
> Link to the datasheet for the P5587:
> http://www.acroname.com/robotics/parts/R64-P5587.html
>
>
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>
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>
>
Rafe
>
Original Message
> From: Rafe [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mcIE_VMAyltVLI1md-V1Mg87czs1nYkQzULisXtSX9o385OEN-kYu7O5W7w-8pEiXXng2oOPeJdyuvA]rafe00@e...[/url
> Sent: Friday, October 12, 2001 6:09 PM
> To: Basicstamps@Yahoogroups. Com
> Subject: [noparse][[/noparse]basicstamps] Hamamatsu P5587 photoreflector
>
>
> Just in case someone has some extra time on their hands . . .
>
>
> I am having trouble with the Hamamatsu P5587 photoreflector.
>
>
> My setup:
>
>
> Ground +5V S
> | |--R1--|
> | | |
> |--C --|---| |
> |-- | R2 |
> | | | | |
> |
|
> |1 4 5 2 3 |
> | Photoflector |
>
>
>
> R1 = 6.8K Ohms
> R2 = 470 Ohms (tried 680 Ohms first)
> C = .1uF
>
> It is hard to see, but pin 4 is connected to ground.
>
> The problem is that S always stays high with or without anything
> if front of
> the reflector. What am I doing wrong here?
>
> Rafe
>
> Link to the datasheet for the P5587:
> http://www.acroname.com/robotics/parts/R64-P5587.html
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
Comments
in a building with fluorescent lighting and the detector triggered
constantly. Had to put a piece of tape over it to prevent false triggering.
Original Message
> Got this one - the light in my test environment was too bright.
> > I am having trouble with the Hamamatsu P5587 photoreflector.
> > The problem is that S always stays high with or without anything
> > if front of
> > the reflector. What am I doing wrong here?