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    Infrared Activated Switch

    Aparantly Sasi didnt read the thread before posting. Quick recap Sasi, I've solved my problem in a much simpler way. Thanks anyway ;D PS: what do you mean by "Dont ask More Questions ....I am busy, but its working fine. ", when did i ask YOU anything?
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    Infrared Activated Switch

    Hi audioguru, I kind of tested your circuit. What i mean is that i didnt quite use the same components you specified. The reason is that i dont have them. i.e. i didnt add the voltage regulator, nor the capacitors, also i used SC945C trans. instead of BC107. Hopefully I'll go and buy them...
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    Infrared Activated Switch

    Hi audioguru, I'll Try and get the components for the circuit hopefully tomorrow and will let you know about the results. However, I did some testing, but with a different NPN transistor (SC945C) and the results where negative. I had a hunch that it was because of the 10K resistor, so I...
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    Infrared Activated Switch

    hi audioguru, First of all,  !!!!THANKS A MILLION!!!!  :D I never really saw that 80K resistor. I guess thats a plus for us ;D Did you design that circuit your self? What Program? Chow.  ;D
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    Infrared Activated Switch

    Hi audioguru, I forgot to mention that the input for the 1st transistor is 5V. If you go back and look through the thread, you'll see a picture of what I plan to do. And you can see that the receiver consists of a 56 KHz IR receiver module which is actually connected to a battery. When it...
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    Infrared Activated Switch

    Hi audioguru, I'll do my best to get the TIP31. I was reading through the thread and came to your post where you mentioned "Why not use only a transistor to replace the relay?"  And then I thought about it and said, "That’s a darn good idea!” I drew out a schematic for what I plan. The only...
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    Infrared Activated Switch

    Hi audioguru, I'll see if i can find the TIP31 in some stores. However, if i cant get my hands on it, can you tell me if this will be equivilent? http://www.alldatasheet.co.kr/datasheet-pdf/view/STMICROELECTRONICS/BFY51.html Oh yeh, what are the charastaristics of a General Purpose...
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    Infrared Activated Switch

    Hi audioguru, I'll add those capacitors you told me about. BTW, I was reading about the 555 timer set as a monostable circuit and I came across this line "For a simple 555 monostable, the trigger pulse must be shorter than the output pulse" found at...
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    Infrared Activated Switch

    Question: why dont i just use one capacitor i.e. 220uF? Also, since I will be using two 555 timers, do i need to double the values? Regarding the transistors, i understand the TIP31 is the better choice. But if i cant find it, are there any equivilents? ;D
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    Infrared Activated Switch

    Hi audioguru, The time-out thing is no problem. I want the alarm to sound for 10s + the time the beam is blocked. So that’s ok. What are current-spikes that are caused by the 555 timer? And how are they dangerous to the other components? And what do you mean by "well-filtered", do I need to...
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    Old pentium 1 processor

    ?????????????
  12. H

    Infrared Activated Switch

    Hey audioguru, Thanks a lot for the help. Sadly, I didn't understand all what you said. Sounds too complicated. Regarding the -12, I meant the negative side of the +12, you can call it ground, or 0. Also, I have the power supply figured out for each circuit. That’s not a problem. I will be...
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    Urgent

    What do you mean by "glass sensor and plastic sensor"?
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    Radio Controlled Switch for Ignition

    Hi, I would suggest that you get yourself one of those cheap remote control cars and take out the guts. In my country, you can get an all direction car for about $4. I’m serious. I’ve already bought like 5 that I’ve dismantled and used one for a room alarm. Just replace the back (or front -...
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    Telivision remote control disabler

    Hi, What you’re looking for is a "Remote Jammer" found at  http://www.electronic-circuits-diagrams.com/funimages/funckt4.shtml I’m building a project which requires an IR LED to be oscillated at 56KHz. I thought, let me point the IR LED at the TV and see if the remote works. Walla, the...
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    12V / 5A Transistor Switch

    Hi, I don’t know if you need this, but it’s a good idea to add a smoothing capacitor in parallel to the output of the rectifier. Something like 200V 2200uF. TAKE CARE ABOUT POLARITY. Why don’t you use a transformer? It’s safer and more efficient than a resistor. Also, what’s an electronic...
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    Wireless Camera using Webcam

    Hi all, I'v had this fasination of wireless electronics for a long time. And recently i had the though of wireless video. I have a webcam that i dont use and an old digicam. both have working lenses which i can take out. Are there any circuits to show you how to build a wireless camera because...
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    Infrared Activated Switch

    WOHO, hold up genius. I found a solution for my problem and I’m building it. It’s much simpler. Take a look. Explanation. The IR LED will be positioned across the door along with the IR Module on the same axis. The output of the receiver will always be high because it is receiving IR light...
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    Old pentium 1 processor

    You have a point there MP, the reason I wanted to use the processor is because I couldn't get my hands of a PIC16F84 microcontroller. Guess I’ll just have to keep looking. Thanks all of you anyway. PS: did anyone have a look at the little robot and is thinking of building it?
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    Infrared Activated Switch

    Sorry, here's the image.
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