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  1. Electro132

    Few Questions about Sound on Light

    Ok cool. So if i place the zener diode the wrong way will it explode? Also, in turns of an amp, if i use a trimpot and turned it fully in one direction then left it like that, would the current coming into that circuit be amplified alot? And if so, wouldn't i need to use a different resistor...
  2. Electro132

    Few Questions about Sound on Light

    ok cool. So the current moves in one direction for the zener and if that zener gets too much voltage input then it breaks down. Does it start back up or is it gone for good after the breakdown?
  3. Electro132

    Few Questions about Sound on Light

    My apologies again, i uploaded the wrong pic. Thanks for the correction. Here' it is with 6v and 3v. Just with the protection diode, what is the difference between a normal diode and a zener diode? I read both. According to what i read, the Zener is special because it has a voltage...
  4. Electro132

    Few Questions about Sound on Light

    Sorry, i changed the resistors to series now. I forgot that series was one after the other. i've added this diagram which used a 555 timer which might make it easier to maintain the current through to the LED just to share. Would like to know what the difference is between using a 555...
  5. Electro132

    Few Questions about Sound on Light

    Hey i did some calculations and labelled the components. Just want to know if the negatives are the arrows leading to nowhere? Also i took a guess on which resistor it was that would suit the 94 ohm (2x 47 ohm in series) resistor as you can see in the picture.
  6. Electro132

    Few Questions about Sound on Light

    Hey I found out what you meant with the cap and res in series for the output of the amp connected to the IR LED. I've attached it.
  7. Electro132

    Few Questions about Sound on Light

    It is 3V but if it gets too hard for me then i'll switch it to 5v or 9v. Thank you. I am really keen on doing this project ever since i found out about Light being used as a carrier. You mean i can change how much i can put out on an LED using an AM signal? I understand. What if an...
  8. Electro132

    Few Questions about Sound on Light

    Thanks for the deletion. Ok so i went and had a look. So far i understand that i need an IR LED which has a resistor to prevent it from burning out. I also learnt that i need to know the supply voltage (i'm planning on 3v), LED forward-voltage drop (usually 1.3V) and the desired current...
  9. Electro132

    Few Questions about Sound on Light

    ok fine. No hard feelings felt here. I'll build it and put it on Utube.....
  10. Electro132

    Few Questions about Sound on Light

    I think if the AM/FM signal received by the receiver is amplified by a transistor or 2 then it should provide enough to send back through to the input of the 1st circuit with the battery source. Then the only problem would be to limit the amount coming into the circuit with a voltage regulator...
  11. Electro132

    Few Questions about Sound on Light

    Well the IC mixes the incoming signal (diode converts signal from AM, which strips the signal for voice or in the case of FM - sound) with the tuner signal coming from the tuner and then combines the 2 signals to go out of the 'output' and into another IC (not sure if the first one is 555 Timer...
  12. Electro132

    Few Questions about Sound on Light

    Ok, i didn't mean using both at the same time. Just one, let's try AM. But i'm having difficulty with the output. I have 2 sources going into the IC and mixing. then the output where it gets amplified and shot through the LED. Its the LED part that i need help with. Since the AM is one...
  13. Electro132

    Few Questions about Sound on Light

    True. That is why the sound is fed into the IC and mixed with the tuning capacitor and placed through the output. The diode helps achieve this What Cable? there should be copper or silver trackings. How? it was coverted and either it is fed into the E-Cap for battery life or mixed with...
  14. Electro132

    Few Questions about Sound on Light

    Yes it is. No hard feelings chap. And i apologise if i said any of the sort but i was referring to converting sound to light and sending it out. Haha No actually i work. This is my down time. LED's are light emitters. Have you ever heard of Infra - Red LED's? They are invisible. So...
  15. Electro132

    Few Questions about Sound on Light

    Thanks Harald Kapp. Yes Q4 is about oscillators. Do you mean like a circuit with a capacitor and resistor to help filter how much current would be passed onto the potentiometer so the tuner capacitor is not needed at all? No there is none. The teacher didn't give any. But i'll try to...
  16. Electro132

    Can sound be delivered using light waves?

    Hi, Wondering if Sound (like music, voice) can be placed on light waves and be projected out as light waves not as sound waves?
  17. Electro132

    Few Questions about Sound on Light

    Hi, I need some help on my assignment involving the EMF spectrum and sound. It is also about creating vibration from sound using LED. I'm stuck with these questions: 1) Explain how sound can be used on LED. 2) Briefly describe how different Frequencies can be used to create sound. 3)...
  18. Electro132

    Old CRT cathode Tubes

    hi, Is it true that old tv CRT tubes use electrons to beam an image? If so, how can i put an IC with an image on it to be amplified and out through it? I mean if i amplify wouldn't that mean i'm imprinting it or making a mark like fire on wood?
  19. Electro132

    Resonance

    The tuner chooses the frequency and the amplifier is used to increase the penetration level of it. So basically what i'm saying is this: Tuner chooses frequency - - - - So far this frequency just does this to the wall Diagram 1.1 - - - - - - - [ <-- Wall Now when i amplify...
  20. Electro132

    Resonance

    Ok i respect that. So let's just say i moved the tuner from my previous ranges to somewhere like 87.7 Mhz - 108.7 Mhz, now would that be more realistic to make? I was thinking along the lines of FM/AM and maybe further up (Bluetooth/Infra-red - wireless) but not too high. I reckon it would...
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