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project:laser_modulation [2015/12/16 19:46] ivan_ahepjuk |
project:laser_modulation [2015/12/16 20:43] ivan_ahepjuk [Main solution:] |
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| * **Pulse-Frequency Modulation**: The main idea is to make laser flashing at the frequency, which I am actually transmitting. In the other words, instead 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-Frequency Modulation**: The main idea is to make laser flashing at the frequency, which I am actually transmitting. In the other words, instead 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. | ||
| - | And that is how I decided to do that. If you dont understand this principle, wait for pictures or ask me personally. | ||
| - | **Step 1:** Initial design: | + | **Step 1:** Initial design: This is basic idea how to build the transmitter. |
| + | * All amplifiers are LM358N | ||
| - | **Step 2:** | ||
| - | **Step 3:** Stay tuned | + | |
| + | **Step 2:** simulation by LTspice (maybe little tutorial how to use ltspice would be more than good) | ||
| + | |||
| + | **Step 3:** Photo of actual prototype | ||