New!! Need help with infrared detect and emitter circuit
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Hello everyone,
I am new here and need much help. I have the programming down for the
basic stamp II, but I don't have knowledge with curcuits.
I have a class project, my group and I have decided to create an
alarm system with an infrared detector and emitter.(small model)
When the infrared path is interuppted by an object we are going to
create a sound.
We are not sure how to connect the IR LEDS to the Basic Stamp and how
to create a logic of 0 or 1 for output.
We need help,
does anyone have any suggestions, it would be greatly appreciated.
note:using IR detector T1-3/4
IR Diode (emitter?) T1-3/4 5 mm
2.1V @ 50mA 940nm
Thanks ,
Sandra
sgarci10@c...
I am new here and need much help. I have the programming down for the
basic stamp II, but I don't have knowledge with curcuits.
I have a class project, my group and I have decided to create an
alarm system with an infrared detector and emitter.(small model)
When the infrared path is interuppted by an object we are going to
create a sound.
We are not sure how to connect the IR LEDS to the Basic Stamp and how
to create a logic of 0 or 1 for output.
We need help,
does anyone have any suggestions, it would be greatly appreciated.
note:using IR detector T1-3/4
IR Diode (emitter?) T1-3/4 5 mm
2.1V @ 50mA 940nm
Thanks ,
Sandra
sgarci10@c...
Comments
Three things come to mind.
1) Go to www.stampsinclass.com and download the robot documentation -- they
have an IR object avoidance code that uses a prebuilt IR sensor and a 555
timer. You need to modulate the LED so you don't confuse ordinary IR with
your IR. You can find more about the IR detectors at the Stamp FAQ:
http://www.al-williams.com/wd5gnr/stampfaq.htm
2) Rentron (www.rentron.com) has some neat IR stuff that may or may not be
more than you need. He also has some project info I think you will find
interesting.
3) You probably don't really want to use a raw IR detector unless you have
to. To do that would require a filter and maybe a PLL. The units you'll find
in the sources I've mentioned use off the shelf detectors that have
everything built in and they work quite well.
Speaking of the robot, our project of the month this month
(www.al-williams.com/awce/som.htm) uses our PAK-VIII to drive the servos of
a BOEBot. One thing I wanted to do, but ran out of time, is to use the
PAK-VIII to also generate the 38kHz modulation for the IR emitter. That
would get rid of the need for the 555. In your case, you probably don't need
any other pulse sources, so probably not good for you.
Good Luck!
Al Williams
AWC
* Expand your Stamp I/O: http://www.al-williams.com/awce/pak3.htm
>
Original Message
> From: sgarci10@c... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=BgJjLGTgJyXamAmmIr9tWGNCBbf_-UC3qYdlw1aAx8JW-2w71VJU5CYHqtFBJzWk23JOtQx-34r0dA]sgarci10@c...[/url
> Sent: Wednesday, October 11, 2000 7:07 PM
> To: basicstamps@egroups.com
> Subject: [noparse][[/noparse]basicstamps] New!! Need help with infrared detect and emitter
> circuit
>
>
> Hello everyone,
> I am new here and need much help. I have the programming down for the
> basic stamp II, but I don't have knowledge with curcuits.
> I have a class project, my group and I have decided to create an
> alarm system with an infrared detector and emitter.(small model)
> When the infrared path is interuppted by an object we are going to
> create a sound.
> We are not sure how to connect the IR LEDS to the Basic Stamp and how
> to create a logic of 0 or 1 for output.
> We need help,
> does anyone have any suggestions, it would be greatly appreciated.
>
> note:using IR detector T1-3/4
> IR Diode (emitter?) T1-3/4 5 mm
> 2.1V @ 50mA 940nm
> Thanks ,
> Sandra
> sgarci10@c...
>
>
>