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But does an LC meter help me with finding the small LC resistance of the inductor? I'm fairly sure about the inductance (the parts are labelled for inductance), it's the dc resistance I need...
Thanks, that site is pretty cool. If I start making something else, I'll never finish this thing though... Can't blow $80 on it right now either :) I just got a digital O-scope (Owon PDS5022T, SPEC on page 72-73). Can I make some bridge or something and use the O-scope, or is it not accurate...
well crap, you're right :) My multimeter is giving me about 5 ohm across the probes. I figured it wasn't great, but I didn't think it would be that large. I believe that I need the dc resistance of the inductors to calculate various parts of an oscillator I want to build (impedance of the LC...
Hello,
I have a number of inductors from 1uH to 4mh that I wanted to use in making colpitts oscillators of various frequencies. I don't know the dc resistance of the inductors (bought off ebay, no specs), and thought I'd just hook up my cheap digital multi-meter to it to figure it out. I...
@brad and betwixt: Okay, that makes a lot more sense, thanks! I'm happy I don't need to shove an extra transistor on the board. So just to clarify, the current will roll through the capacitor, setting the output high. When the capacitor charges up, the current will have to go through the 100k...
Hello,
I'm just starting out, so tell me if I am not saying this right. As I understand it (based on other posts), you can't depend upon the initial value of a flip flop. I have a set of jk flipflops with set/reset pins (CD4027B) and I wanted to know if the power-on-reset logic that I made...
Hello,
Maybe this thread is a bit old, but if you are still interested, there is a problem with line 27. The:
Greet myGreet1("Hi from Greet1");
line cannot be in the class definition. What is happening is that you are trying to initialize a non-static member variable (myGreet1) in...
Sorry for the delay, but thanks for the help. So it looks like the bottom line is that it is more complicated than I thought and the equation I was told only applies to a single RC element.
okay, so the link seems to say (unless I've read this wrong), that the phase angle of the output of a series RC circuit is the angle of the vector sum of the reactance and the resistance (which for a single RC element would be the total impedance), right? But it also says that 'When resistors...
Hello,
Hopefully this isn't duplicating any other thread, I've looked but have not found an answer that I understand. I think I understand how a capacitor stores charge in an electric field, and I believe I understand why there is a phase shift in the output of the capacitor with respect to...
Thanks FvM, that was what I was missing. So the loss resistance is going to be the sum of the dc resistance of wire, the skin effect resistance and the proximity effect resistance. And all a multimeter would give me would be the dc resistance (which is probably dwarfed by the other two)...
Hello,
Okay, so I looked at your latest incarnation. The first piece of code in your latest post is correct, in that you can build it properly with a decent compiler (gcc) and it works as you would expect it to. If it is not working for you, I think you may have run into a limitation of the...
Hello,
Your problem is that you can't initialize structs like that. When initializing a struct with the {} syntax, you want to just provide a list of all the values of the members *in the order declared in the struct*. If the member is another struct, you can define the submembers using...
Hello,
Your problem is this line:
retVal = sscanf(&string[6],"%f,%f,%hhd,%hhd,%hhd",&theFloat1, &theFloat2, &theChar1); // IN THIS INSTRUCTION ALL OK!
You are telling sscanf that you have 2 floats and 3 bytes. Your are then passing in 2 floats and 1 byte. While this doesn't seem like a...
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