Electronics > Beginners
Beginner Components?
Simon:
--- Quote from: JacobEdward on February 24, 2015, 08:07:48 pm ---
--- Quote from: Simon on February 24, 2015, 08:05:57 pm ---Your going about it the wrong way, there are numerous factors that make up an inductor: inductance, max current, self resonant frequency, resistance and I'm sure more, you can't just buy a few parts and expect to plug them into a circuit, design your circuit, work out what inductor you need and then get it.
--- End quote ---
I'm sure, but I'm still going to verify it empirically before I start memorizing crap out of a book... now if you know of a cheap part I can use to experiment with, that would be great.
--- End quote ---
Any part will do then, just grab something and experiment with it, say 100 uH.
We still don't know what signals your trying to produce, if you want 50MHz 50% duty then maybe but if your doing PWM then there is no straight answer. You insist on taking the easy route to program and that gets you no control over your hardware. You can use an 8MHz MCU to control a motor at 10'000 rpm........ you need to learn about the MCU hardware, MCU's are not computers, you can't relay on a virtually limitless processing resource.
JacobEdward:
--- Quote from: WattsUp on February 23, 2015, 07:41:55 am ---I'm not quite sure what you are asking, but a voltage divider should NOT be used to create a power supply rail. They are intended for very low signal currents. A voltage regulator is basically just a zener reference diode, with an emitter follower and some overheat protection (You can make your own). For AC to DC conversion, you will need a transformer to lower the voltage, and a bridge rectifier and some big ass capacitors to smooth out the supply under load. Capacitors are used with voltage regulators in a similar way, to prevent voltage peaks and dips by storing and releasing energy when it is needed. Hopefully that answered your query.
--- End quote ---
That does help, thanks! Why do they call it a power supply "rail"?
I've been curious though, how do diodes work? How is there a substance that can allow electricity to flow in one direction but not the other... I get the idea of a capacitor (I think), but for diodes it's not like these currents are on separate lines... I've read the wikipedia and it didn't really explain how that works.
JacobEdward:
--- Quote from: Simon on February 24, 2015, 08:11:16 pm ---
--- Quote from: JacobEdward on February 24, 2015, 08:07:48 pm ---
--- Quote from: Simon on February 24, 2015, 08:05:57 pm ---Your going about it the wrong way, there are numerous factors that make up an inductor: inductance, max current, self resonant frequency, resistance and I'm sure more, you can't just buy a few parts and expect to plug them into a circuit, design your circuit, work out what inductor you need and then get it.
--- End quote ---
I'm sure, but I'm still going to verify it empirically before I start memorizing crap out of a book... now if you know of a cheap part I can use to experiment with, that would be great.
--- End quote ---
Any part will do then, just grab something and experiment with it, say 100 uH.
We still don't know what signals your trying to produce, if you want 50MHz 50% duty then maybe but if your doing PWM then there is no straight answer. You insist on taking the easy route to program and that gets you no control over your hardware. You can use an 8MHz MCU to control a motor at 10'000 rpm........ you need to learn about the MCU hardware, MCU's are not computers, you can't relay on a virtually limitless processing resource.
--- End quote ---
Cheap part number I can find on ebay?
JacobEdward:
--- Quote from: Simon on February 24, 2015, 08:11:16 pm ---
--- Quote from: JacobEdward on February 24, 2015, 08:07:48 pm ---
--- Quote from: Simon on February 24, 2015, 08:05:57 pm ---Your going about it the wrong way, there are numerous factors that make up an inductor: inductance, max current, self resonant frequency, resistance and I'm sure more, you can't just buy a few parts and expect to plug them into a circuit, design your circuit, work out what inductor you need and then get it.
--- End quote ---
I'm sure, but I'm still going to verify it empirically before I start memorizing crap out of a book... now if you know of a cheap part I can use to experiment with, that would be great.
--- End quote ---
Any part will do then, just grab something and experiment with it, say 100 uH.
We still don't know what signals your trying to produce, if you want 50MHz 50% duty then maybe but if your doing PWM then there is no straight answer. You insist on taking the easy route to program and that gets you no control over your hardware. You can use an 8MHz MCU to control a motor at 10'000 rpm........ you need to learn about the MCU hardware, MCU's are not computers, you can't relay on a virtually limitless processing resource.
--- End quote ---
Could you explain the difference between PWM and 50MHz with a 50% duty cycle?
It's definitely not the easy route to program, it's just I've already invested the time to learn a programming language and I'm not interested in learning another language when I already have a microcontroller that I know how to program... sorry if people don't like that it's possible to do this in languages other than C or assembly, but my microcontroller is fully capable of doing anything any other microcontroller is capable of doing apart from generating a 50Htz signal... which is why I'm asking this question, but after about 5 times I still haven't got a straight forward response...
Simon:
--- Quote from: JacobEdward on February 24, 2015, 08:24:49 pm ---It's definitely not the easy route to program, it's just I've already invested the time to learn a programming language and I'm not interested in learning another language when I already have a microcontroller that I know how to program... sorry if people don't like that it's possible to do this in languages other than C or assembly, but my microcontroller is fully capable of doing anything any other microcontroller is capable of doing apart from generating a 50Htz signal... which is why I'm asking this question, but after about 5 times I still haven't got a straight forward response...
--- End quote ---
Well i'm sorry but unless you do things right they won't work! why the hell are you trying something as complicated as a variable frequency drive when you don't have micro-controller specific programming skills and you don't even know how a diode works even after reading about it. I'm sorry but we can't make you learn and there is no secret. Unless your going to do things properly and in some order then I'm sorry but there is nothing we can do.
you claim to know all about programming but don't understand the concept of PWM which is at the basis of controlling real world devices like motors with a digital microcontroller, so I suggest you stop thinking you can do anything in java and learn to program properly in C like everyone else does at this level of development and learn basic circuitry techniques. You seem to be blissfully unware of just how much you don't know (not that I'm an expert either) and yet there is no way to explain anything to you. For gods sake get the simplest beginner book and read it!
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