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project:laser_modulation [2015/12/16 19:44]
ivan_ahepjuk
project:laser_modulation [2015/12/23 19:13] (current)
ivan_ahepjuk [Main solution:]
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 **Introduction:​** **Introduction:​**
-Hopefully there will not be big fails. Still, It would be challenge to tune and tweak the concept and build robust design. I would like to use green laser, because i got it at home and I think that its strong enough to transfer from my rooftop to the Ema hill.+Hopefully there will not be big fails. Still, It would be challenge to tune and tweak the concept and build robust design ​with using as little parts as possible. I would like to use green laser, because i got it at home and I think that its strong enough to transfer from my rooftop to the Ema hill.
  
   * **step 0:** Think, ask and read how to use laser beam to transfer sound frequencies. Think how to receive this kind of information. Understand the principles.   * **step 0:** Think, ask and read how to use laser beam to transfer sound frequencies. Think how to receive this kind of information. Understand the principles.
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 **2]** It would be pain in the ass to calibrate this and it would change with "each blow of the wind". There are better way and they are called modulation. **2]** It would be pain in the ass to calibrate this and it would change with "each blow of the wind". There are better way and they are called modulation.
  
-  * **Pulse-Frequency ​Modulation**:​ The main idea is to make laser flashing at the frequency, which I am actually ​transmitting. In the other wordsinstead of transmitting sinus of the frequency X, I can transmitt pulse signal ​of the frequency ​X and then, after receiving this pulse signal of the frequency X, just make the sinus from it by analog filters. ​ +  * **Pulse-Width Modulation**:​ The main idea is to make laser flashing at certain ​frequency ​and while transmitting, ​be changing ​the width of pulses by the transmitted ​frequency 
-And that is how I decided to do thatIf you dont understand this principle, wait for pictures or ask me personally.+  * https://en.wikipedia.org/​wiki/​Pulse-width_modulation
  
  
 +**Step 1:** Initial design: This is basic idea how to build the transmitter. ​
 +  * All amplifiers are LM358N
 +Cannot upload pictures:/
  
-**Step 1:** 
- 
-**Step 2:** 
- 
-**Step 4:** Stay tuned 
  
 +**Step 2:** simulation by LTspice (maybe little tutorial how to use ltspice would be more than good)
 +Cannot upload pictures:/
 +**Step 3:** Photo of actual prototype
 +Cannot upload pictures:/
 +**Step 4:** stay tuned
  
  
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  • Last modified: 2015/12/16 19:44
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