Laser or IR beam alarm system - Page 2 - Electronic Circuits Projects Diagrams Free

zachtheterrible · 18th May 2005, 02:51 PM

Oh, yes, well that would require a transmitter and receiver, and an encoder and decoder. I am working on that for a security system for my house, ill post a schematic maybe tomorrow, gotta leave for work right now, and then im going straight to the new star wars at 12:01AM, no time right now :lol:

Buddhika123 · 13th December 2005, 08:12 AM

I am a lunatic at this but i'm a beginner 2 :idea: . so if you dont mind i need to know where the (-)terminal of the battery fits in :cry: . Its being a bit of a problem for sometime to me. But coudnt find an answer. 1 more thing why is the earthing neccessary and is it important and how can i do it.
:P Please email to me to Buddhika_karunathilaka123@yahoo.com.
Thank You.
Buddhika :?:

akg · 13th December 2005, 08:43 AM

Quote:

Originally Posted by Buddhika123

I am a lunatic at this but i'm a beginner 2 :idea: . so if you dont mind i need to know where the (-)terminal of the battery fits in :cry: . Its being a bit of a problem for sometime to me. But coudnt find an answer. 1 more thing why is the earthing neccessary and is it important and how can i do it.
:P Please email to me to Buddhika_karunathilaka123@yahoo.com.
Thank You.
Buddhika :?:

the -ve of the battery is the ground point shown in the figure . just connect the -ve point of batt: to that point. The ckt does not need an earthing

jumanjy1one · 14th December 2005, 09:52 AM

thanx

chemelec · 16th December 2005, 02:44 AM

You Might take a look at the Laser alarm circuit on my website.

http://www3.telus.net/chemelec/Proje...aser-Alarm.htm

It works quite good.

Alex_rcpilot · 19th December 2005, 10:39 AM

Looks pretty interesting.I've done the same when I was in high school.I used an SCR instead.Just in order anyone crosses the beam will trigger a circuit and make it work forever.A relay for example.I recorded a voice message in the terminal section of a tape and left the tape recorder playing.While the power to the tape recorder was temporarily cut off by the relay.When mom went back home she triggered the voice message.She got a little surprised....anyway it was interesting.

I suggest that you guys go with a microcontroller such as PIC.Most people here use it.By then you can use the photo sensor as an input of the system,and control as many various outputs as you wish.You want to know how many times the photo sensor has been blinded,then display the number on a couple of LEDs,and you can still control an alarm to sound or whatever you need to work to respond the movement.You've find more interest when you've learned how to do that.Good luck.

zachtheterrible · 19th December 2005, 04:46 PM

I've been trying to get into PICs, but I can't get the programmer to work and I've been busy with other things. I guess I'll just buy one and get that over with :lol:

Alex_rcpilot · 20th December 2005, 01:27 AM

What type of programmer that doesn't work have you got?Is it an MPLAB ICD2?
There're a lot of 3rd-party programmers you can go with.And if you haven't used ICD2 before,you can try it.Either buying one or building one on your own will help.

zachtheterrible · 23rd December 2005, 01:02 AM

Quote:

Originally Posted by Alex_rcpilot

What type of programmer that doesn't work have you got?Is it an MPLAB ICD2?
There're a lot of 3rd-party programmers you can go with.And if you haven't used ICD2 before,you can try it.Either buying one or building one on your own will help.

P16PRO40 programmer is the one I tried building.

Alex_rcpilot · 31st December 2005, 03:39 AM

Quote:

Originally Posted by zachtheterrible

P16PRO40 programmer is the one I tried building.

:shock: oops!That's something I've never heard before.Anyway,keep trying.If you can't get it to work eventually,don't stick to it.Try another.There're plenty of sites aboundant in information on ICD2 clones,say Jay's site for example.You may consider going with an ICD2.I can send you a PCB file too.Get it made and simply solder the SMD components,it will work quite well.

formidable2010 · 31st March 2006, 03:25 PM

i think that this circuit is a little bit cumbersome and i will prefer a magnetic relay instead to be used here along with the LDR

nitish · 26th May 2006, 04:45 PM

CAN ANYBODY PLEASE HELP ME BY LOOKING THIS CKT DIAGRAM AND SAYING WHETHER IT'S CORRECT OR WRONG PLS HELP.[IMG]Infrared Detection[/IMG]

Dr.EM · 27th May 2006, 01:17 PM

I'm pretty sure I can change the format of a BMP to GIF without altering its size. Email me it if you want, or better, download irfan view, it should do it.

reyandy · 2nd June 2006, 02:42 AM

hi where can i find tutorials how to use IR reciever/transmitter...i want to build a simple IR switch but I dont know where to start..

**Nigel Goodwin** · 2nd June 2006, 08:32 AM

Quote:

Originally Posted by reyandy

hi where can i find tutorials how to use IR reciever/transmitter...i want to build a simple IR switch but I dont know where to start..

Check my PIC tutorials, if you don't want PIC's?, then check the Holtek encoder/decoder range.

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18th May 2005, 02:51 PM
zachtheterrible Experienced Member	Oh, yes, well that would require a transmitter and receiver, and an encoder and decoder. I am working on that for a security system for my house, ill post a schematic maybe tomorrow, gotta leave for work right now, and then im going straight to the new star wars at 12:01AM, no time right now :lol: __________________ I'm no electronics god, i just talk too much.

13th December 2005, 08:12 AM
Buddhika123 New Member	Needs HElp I am a lunatic at this but i'm a beginner 2 :idea: . so if you dont mind i need to know where the (-)terminal of the battery fits in :cry: . Its being a bit of a problem for sometime to me. But coudnt find an answer. 1 more thing why is the earthing neccessary and is it important and how can i do it. :P Please email to me to Buddhika_karunathilaka123@yahoo.com. Thank You. Buddhika :?:

16th December 2005, 02:44 AM
chemelec Experienced Member	You Might take a look at the Laser alarm circuit on my website. http://www3.telus.net/chemelec/Proje...aser-Alarm.htm It works quite good. __________________ I No Longer accept Private Messages on here. All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\" or they go Directly to my Junk Mail Folder. Email me at: chemelec@hotmail.com Website: http://www3.telus.net/chemelec

19th December 2005, 10:39 AM
Alex_rcpilot Experienced Member	Looks pretty interesting.I've done the same when I was in high school.I used an SCR instead.Just in order anyone crosses the beam will trigger a circuit and make it work forever.A relay for example.I recorded a voice message in the terminal section of a tape and left the tape recorder playing.While the power to the tape recorder was temporarily cut off by the relay.When mom went back home she triggered the voice message.She got a little surprised....anyway it was interesting. I suggest that you guys go with a microcontroller such as PIC.Most people here use it.By then you can use the photo sensor as an input of the system,and control as many various outputs as you wish.You want to know how many times the photo sensor has been blinded,then display the number on a couple of LEDs,and you can still control an alarm to sound or whatever you need to work to respond the movement.You've find more interest when you've learned how to do that.Good luck. __________________ Regards, Alex

19th December 2005, 04:46 PM
zachtheterrible Experienced Member	I've been trying to get into PICs, but I can't get the programmer to work and I've been busy with other things. I guess I'll just buy one and get that over with :lol: __________________ I'm no electronics god, i just talk too much.

20th December 2005, 01:27 AM
Alex_rcpilot Experienced Member	What type of programmer that doesn't work have you got?Is it an MPLAB ICD2? There're a lot of 3rd-party programmers you can go with.And if you haven't used ICD2 before,you can try it.Either buying one or building one on your own will help. __________________ Regards, Alex

31st March 2006, 03:25 PM
formidable2010 New Member	i think that this circuit is a little bit cumbersome and i will prefer a magnetic relay instead to be used here along with the LDR

26th May 2006, 04:45 PM
nitish New Member	CAN ANYBODY PLEASE HELP ME BY LOOKING THIS CKT DIAGRAM AND SAYING WHETHER IT'S CORRECT OR WRONG PLS HELP.[IMG]Infrared Detection[/IMG]

27th May 2006, 01:17 PM
Dr.EM Experienced Member	I'm pretty sure I can change the format of a BMP to GIF without altering its size. Email me it if you want, or better, download irfan view, it should do it. __________________ Angry!? I'm absolutely electrolytic! Will have to make do with myspace now I guess...

2nd June 2006, 02:42 AM
reyandy New Member	hi where can i find tutorials how to use IR reciever/transmitter...i want to build a simple IR switch but I dont know where to start..