Basic Stamp alarm

[MacGeek117]

I'm working on an alarm using the BS2. It will sense a beam of IR across a doorway
and if that beam is broken, the BS2 will emit a 4000 Hz tone for 1 second.
bugg

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So many projects, so little time.

[MacGeek117]

Note: you MUST read the text.
bugg

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So many projects, so little time.

[Jon Williams]

You might consider using the PIN definition to make the program easier to update or incorporate into other projects.

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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

[MacGeek117]

Thank you, Jon!
bugg

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So many projects, so little time.

[MacGeek117]

Guys, I made a revised version of the original software.
The Tx is a 74LS04 osillator circuit.

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So many projects, so little time.

[MacGeek117]

OK, I did it again. It works beter now!
bugg

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Boe-bot: $229

Toddler: $249

Learning Google is your friend: priceless

[The_N3rd]

I tried the same thing, except that I used a laser pointer running off of a AC/DC power supply, and a·photoresistor to detect if the beam was interrupted.· When it· was it set off an alarm that didn’t turn off.·

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the NERD, Kelie B.


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·
· If electricty comes from electrons, does morality come from morons?

[MacGeek117]

Thats the point! Just press the reset button.
bugg

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Boe-bot: $229


Toddler: $249

Learning Google is your friend: priceless

[andy11667]

i would like to do this can i do it with the boe bot board of education

[MacGeek117]

Yes you can.
bugg

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Boe-bot: $229


Toddler: $249

Learning Google is your friend: priceless

[christian_hahn13]

I had actually tried this once, but instead of using a tube to focus the IR led I used an old camera lens.

This significantly increased the accuracy of the beam.

[MacGeek117]

I have posted a schematic of the project.

bugg

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Boe-bot: $229


Toddler: $249

Learning Google is your friend: priceless

[Robby]

Hi gyes.This is my first time in this forum.I found it excellent.I am from greece .So ,my english are not very good.I would like to ask if we can use 2 ir leds in alarm.What do you think?THen the alarm will be better .in addition i have a circuit than can make the piezospeaker stronger.

[Tronic (Greece)]

Robby, you can use up to 7 IR pairs (LEDS - DETECTORS) or up to 15 simple photointerupters detectors to armor all over your place if you like!!

The only problem I see is all the wiring along the house making your wife go crazy!!!
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[Beau Schwabe (Parallax)]

Robby,

If you want to increase the volume of a "raw piezo" (i.e no internal piezo circuitry), then
see my reply in the "Stamps in Class" section several months ago about amplifying a piezo speaker.

http://forums.parallax.com/showthread.php?p=464410



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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

[Robby]

I hadnt thought of this.we can put more than 2 ir leds.so ,thanks for the help on amplifying.In addition we can put a microphone and other sensors.the only thing we've to do is·to make the suitable programm.

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DONT REST UNTIL YOU BEAT THE BEST

[MacGeek117]

I have also posted a SX version.
bugg

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Boe-bot: $229


Toddler: $249

Learning Google is your friend: priceless