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  1. Electro132

    How do you increase IR LED range?

    Any ideas where i can get some globes or fresnel lens?
  2. Electro132

    Thyristor diagrams in wrong place or not?

    Thanks Steve. By the way, i found out that the circuit on that website works so nothing needs to be changed. I only need the other larger circuit diagram explained as it is in german. Cheers
  3. Electro132

    Thyristor diagrams in wrong place or not?

    Also need to know how to attach a screw on capacitor to the circuit as i've never done one before. Cheers
  4. Electro132

    Thyristor diagrams in wrong place or not?

    HI, I need some help deciphering this circuit on how it works and whether the components are in the correct place. It's from this website: http://www.doityourselfgadgets.com/p/coilgun-knowledgebase.html I found out that the thyristor they placed has G (far right) in the negative...
  5. Electro132

    How do you increase IR LED range?

    What are Phlatlight LEDS? Also are there PCB diagrams available? I'll look on google and see what i can find. Thanks guys
  6. Electro132

    How do you increase IR LED range?

    Actually i'm looking towards the 940 nm range. Ok let's scale back to about at least 1km in range. I'm thinking a high powered IR LED (possibly at 1000 mA) with a fresnel lens used as a window can at least increase its range. Either that or use a fiber optics tube with the lens.
  7. Electro132

    How do you increase IR LED range?

    Well it is for long range indoor and outdoor use. I have taken into account oxygen dissipating any signal given. i am thinking of a range that is about 160 km or 100 miles. Yes sunlight during the day will be an issue. What type of filter are you suggesting for a range of this sort...
  8. Electro132

    How do you increase IR LED range?

    Hi, I'm trying to find out how to increase the range on an IR LED. I know some methods like - adding more LED's; - increasing the voltage input (i.e. instead of using a 5v batt you use a 12 v); - adding transistors to amplify the existing voltage input into its base (i.e. using a 5v...
  9. Electro132

    Few Questions about Sound on Light

    Sorry here's the diagram with better references. Take note though that i did not include the resistor values due to me just giving the idea and seeing if it will work with our current project.
  10. Electro132

    Few Questions about Sound on Light

    Hey i did some studies on it and found out it could probably help increase the range for the LED. I've attached a diagram just to make sure it's correct.
  11. Electro132

    Few Questions about Sound on Light

    Ok Cool. Just also with the range thing, i was thinking maybe using a thyristor in place after amping the voltage current up with some transistors so i could get more range out of the LED. I know transistors have two versions npn and pnp but i'm still a little confused about the 2 of them...
  12. Electro132

    Few Questions about Sound on Light

    That's not such a bad idea. I'll do that. Also, do you think having 2 transistors in place one after the other increases the voltage output from a 3 v source? i've heard of darlington pair or something like that to amp the voltage output. On the receiving end, i know that having a...
  13. Electro132

    Demodulation

    Can you show us what you mean in a diagram please?
  14. Electro132

    Few Questions about Sound on Light

    No, not yet. I tried to send through the IR LED a Square wave at 108 hz but nothing was happening. So i tried it at 108000 hz (which is like 108 khz right?) and still got nothing. So i'm wondering whether i need a transducer or something to convert the signal and then send it through before i...
  15. Electro132

    Few Questions about Sound on Light

    I re-soldered the components onto a new baord. Seems like the old one had broken tracks or something as it wasn't generating any current onto the diode and IR LED.
  16. Electro132

    Few Questions about Sound on Light

    YAY! i got it to work. Thanks Steve. I'm going to try it out with some apps. Btw, how do you make the IR LED go farther in terms of distance so i can cover more ground?
  17. Electro132

    Few Questions about Sound on Light

    How come? Doesn't a zener diode help protect the IR LED from receiving too much current? That was my initial understanding why there was a protective diode there in the first place since it provides a voltage threshold which doesn't allow the current to overflow the threshold.
  18. Electro132

    Few Questions about Sound on Light

    Zener diode (protective diode) that protects the IR LED from too much current.
  19. Electro132

    Few Questions about Sound on Light

    The voltage on the resistor (33 ohm) is 2.974 v but no voltage is running across to the Zener and IR LED. I've checked the zener and the IR LED and they work ok. i've soldered everything correctly so i'm not sure what's wrong. I'll upload some pics soon. I'll try again today.
  20. Electro132

    Few Questions about Sound on Light

    Steve, I've built it but there's bad news and good news. Bad news is the IR LED is not functioning when i place a square wave into the circuit place where the amplifier goes. Even when i place an amplifier the IR LED still doesn't turn purple when i use my mobile camera on it. Good...
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