- Joined Apr 22, 2009
Okay, so regarding the L, C, and Frequency values I don't know how to calculate them. I know the formula is:zero coke,
To make a matching pair of tuned LC circuits, you need to figure the frequency (fr) you want the circuit to resonate at. From that fr you can determine capacitor and inductor values. One of the elements should be variable, in order to easily 'tune' the circuit. Then build both circuits and then them up!
I would recommend getting some kind of simulation software (pspice) and simulating your design first. That way, you can play with the values easily double-check your math, and (most importantly ) not waste any money on wrong parts.
How you actually measure stuff depends on what kind of test equipment you have. If you have a good oscilloscope, and a function generator, you can look at the input and output signals of the circuit. Remember a resonant circuit also behaves as a filter, passing your desired frequency and rejecting others. So if you can supply various input frequencies and observe the output, and if your circuit is correct, you will see that the magnitude of the output is much smaller than the input, except when near the resonant frequency.
But I don't know the L or C values to calculate the resonant frequency.
Regarding the SPICE software, I find it difficult to use becasue it seems like its a programming language on its own and I really don't want to branch off learning other things because I don't have the time...its command line but its sort of hard for complex circuits...
And what do you mean by measuring input/output frequencies? How do you measure these? And sorry again but can you tell me what you mean by the input will be much smaller than the output? Is this our goal?
So -SK- I did what you said and I drew this diagram so please let me know if I'm missing something o have something wrong: