Questions pertaining to Infrared...
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Thanks to everyone for the servo help!
OK, I've tried everything and I cannot seem to get infrared diodes to work. I
bought them from Radio Shack, and I was hoping to use them in a Laser Tag
project I am working on (which will be easy now that I have the Basic Stamp!). I
have talked to other people about this, but no one has helped me. So, I decided
to dip into the vast knowledge that is this message board, and ask for help. I
just know there's some way to do this easily on the BS. But what is it? Any help
is always appreciated. By the way, I only have a BS1 and 2.
[noparse][[/noparse]Non-text portions of this message have been removed]
OK, I've tried everything and I cannot seem to get infrared diodes to work. I
bought them from Radio Shack, and I was hoping to use them in a Laser Tag
project I am working on (which will be easy now that I have the Basic Stamp!). I
have talked to other people about this, but no one has helped me. So, I decided
to dip into the vast knowledge that is this message board, and ask for help. I
just know there's some way to do this easily on the BS. But what is it? Any help
is always appreciated. By the way, I only have a BS1 and 2.
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
*or* use a video camera or one of those I/R detector cards from Radio Shack
to verify the infrared LED is working.
Ideally you would use the BS2 (since it can modulate the I/R diode) and a
transistor (2N2222 is good) to drive the LED. Most I/R LED's draw too much
current to run them directly off a Stamp pin.
Original Message
> OK, I've tried everything and I cannot seem to get infrared diodes to
work. I bought them from Radio Shack, and I was hoping to use them in a
Laser Tag project I am working on (which will be easy now that I have the
Basic Stamp!). I have talked to other people about this, but no one has
helped me. So, I decided to dip into the vast knowledge that is this message
board, and ask for help. I just know there's some way to do this easily on
the BS. But what is it? Any help is always appreciated. By the way, I only
have a BS1 and 2.
(38 - 40Khz usually, right ?).
Then, of course, the detectors should be modulated at the same frequency and
be matched to the same wavelength of IR light - am I right here ?
Regards,
Justin.
Original Message
From: Rodent [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=0EmCoalYQd41pinaZs734fPEnbNT6dLedVfuKDCXFIS6ULmBybD8zDYhU4UDFCGYDMT7Y8NHAoE0N_JcsyA]daweasel@s...[/url
Sent: 20 October 2001 14:58
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Questions pertaining to Infrared...
First, either use normal visible LED's to verify the circuit is working,
*or* use a video camera or one of those I/R detector cards from Radio Shack
to verify the infrared LED is working.
Ideally you would use the BS2 (since it can modulate the I/R diode) and a
transistor (2N2222 is good) to drive the LED. Most I/R LED's draw too much
current to run them directly off a Stamp pin.
Original Message
> OK, I've tried everything and I cannot seem to get infrared diodes to
work. I bought them from Radio Shack, and I was hoping to use them in a
Laser Tag project I am working on (which will be easy now that I have the
Basic Stamp!). I have talked to other people about this, but no one has
helped me. So, I decided to dip into the vast knowledge that is this message
board, and ask for help. I just know there's some way to do this easily on
the BS. But what is it? Any help is always appreciated. By the way, I only
have a BS1 and 2.
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not good. However, if you are using an I/R receiver module (like the metal
can thing Radio Shack sells), then you do need to modulate the I/R. See the
spec sheet on the I/R receiver for details.
The detector modules are not modulated. It typically has some sort of filter
circuit built in that rejects any I/R signals that are not at the proper
frequency.
Original Message
> By "modulate", I assume you mean pulse the IR diode at a given frequency
> (38 - 40Khz usually, right ?).
> Then, of course, the detectors should be modulated at the same frequency
and
> be matched to the same wavelength of IR light - am I right here ?
> First, either use normal visible LED's to verify the circuit is working,
> *or* use a video camera or one of those I/R detector cards from Radio
Shack
> to verify the infrared LED is working.
>
> Ideally you would use the BS2 (since it can modulate the I/R diode) and a
> transistor (2N2222 is good) to drive the LED. Most I/R LED's draw too much
> current to run them directly off a Stamp pin.
>
>
Original Message
>
> > OK, I've tried everything and I cannot seem to get infrared diodes to
> work. I bought them from Radio Shack, and I was hoping to use them in a
> Laser Tag project I am working on (which will be easy now that I have the
> Basic Stamp!). I have talked to other people about this, but no one has
> helped me. So, I decided to dip into the vast knowledge that is this
message
> board, and ask for help. I just know there's some way to do this easily on
> the BS. But what is it? Any help is always appreciated. By the way, I only
> have a BS1 and 2.
Although I've been dabbling in electronics for several years, I'm
embarrassed to admit that I don't firmly know how to use the most building
block of circuits! I'm using two IR LEDs and IR Logic Detectors
opto-interrupt style to detect the positioning of a shutter in a camera, and
need to turn them on only occasionally from a stamp pin. I've got a couple
of 2N2222A transistors, are these the same as 2N2222 transistors?
Thanks,
Stewart
>First, either use normal visible LED's to verify the circuit is working,
*or* use a video camera or one of those I/R detector cards from Radio Shack
to verify the infrared LED is working.
Ideally you would use the BS2 (since it can modulate the I/R diode) and a
transistor (2N2222 is good) to drive the LED. Most I/R LED's draw too much
current to run them directly off a Stamp pin.
Holding the transistor in front of you with the leads pointed down and the
flat side facing you, the terminals are emitter, base and collector from
left to right.
I'll email you a schematic.
Original Message
> I'm wondering if you could elaborate on how to hook up the transistor?
>
> Although I've been dabbling in electronics for several years, I'm
> embarrassed to admit that I don't firmly know how to use the most building
> block of circuits! I'm using two IR LEDs and IR Logic Detectors
> opto-interrupt style to detect the positioning of a shutter in a camera,
and
> need to turn them on only occasionally from a stamp pin. I've got a
couple
> of 2N2222A transistors, are these the same as 2N2222 transistors?
http://www.engr.trinity.edu/~knickels/class/engr2164/s00/data/2n2222a.pdf
Original Message
> I'm wondering if you could elaborate on how to hook up the transistor?
>
> Although I've been dabbling in electronics for several years, I'm
> embarrassed to admit that I don't firmly know how to use the most building
> block of circuits! I'm using two IR LEDs and IR Logic Detectors
> opto-interrupt style to detect the positioning of a shutter in a camera,
and
> need to turn them on only occasionally from a stamp pin. I've got a
couple
> of 2N2222A transistors, are these the same as 2N2222 transistors?
Stewart
Original Message
From: basicstamps@yahoogroups.com
Date: Monday, October 22, 2001 09:35:47
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Questions pertaining to Infrared...
OOPS -- Brainfart. Here is the pinout for the transistor:
http://www.engr.trinity.edu/~knickels/class/engr2164/s00/data/2n2222a.pdf
Original Message
> I'm wondering if you could elaborate on how to hook up the transistor?
>
> Although I've been dabbling in electronics for several years, I'm
> embarrassed to admit that I don't firmly know how to use the most building
> block of circuits! I'm using two IR LEDs and IR Logic Detectors
> opto-interrupt style to detect the positioning of a shutter in a camera,
and
> need to turn them on only occasionally from a stamp pin. I've got a
couple
> of 2N2222A transistors, are these the same as 2N2222 transistors?
To UNSUBSCRIBE, just send mail to:
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[noparse][[/noparse]Non-text portions of this message have been removed]
the 38 or 40 KHz detectors also. Just set the pin low, then do the PULSOUT.
The main thing is you can drive the LED's harder (supply more current) than
with just a Stamp pin.
Original Message
> Rodent, Thank you for the quick reply. That schematic says it all!
> OOPS -- Brainfart. Here is the pinout for the transistor:
>
> http://www.engr.trinity.edu/~knickels/class/engr2164/s00/data/2n2222a.pdf
>
>
Original Message
>
> > I'm wondering if you could elaborate on how to hook up the transistor?