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.
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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

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