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Beginner Components?

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JacobEdward:

--- Quote from: LaurentR on February 19, 2015, 01:57:44 am ---If you want to read about components, the fist two volumes of "Encyclopedia of Electronic Components" by Charles Platt are easy reads.

--- End quote ---

I've got the book in front of me but it doesn't actually list any cheap part numbers I can find on ebay to start experimenting with... I'm trying to prove these concepts empirically instead of just reading them in a book so if you know anything that lists off a bunch of cheap part numbers for encoders, inductors, transistors, etc. that would be great.

Simon:
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.

JacobEdward:

--- Quote from: Hero999 on February 23, 2015, 04:37:39 pm ---
--- Quote from: JacobEdward on February 22, 2015, 10:49:05 pm ---
--- Quote from: Simon on February 22, 2015, 10:10:48 pm ---JavaScript does not exactly sound like a microcontroller language.

--- End quote ---

Javascript is a turing complete language, what that means is there is nothing that any other language can do that Javascript cannot do (it just so happens that Javascript is directly built into the major browsers, can script a server, create offline apps, mobile apps, microcontrollers, etc.)
--- End quote ---
Javascript is also an interpreted language which makes it very slow compared to a compiled language such as C so itsn't suitable for most MCUs.

It's possible to run Javascript on an MCU but it's not cheap or efficient.
https://tessel.io/

--- End quote ---

I've found a much cheaper microcontroller that is programmable in Javascript... espruino.com and it's completely open source, so presumably I could eventually buy a $5 development board and load espruino on it (though I'm definitely going to be supporting espruino.com since I think it's an amazing company).

Btw, I've been asking this over and over again and still haven't gotten a response... is it possible to just buy another ARM chip and have one microcontroller use it to generate 50MHtz signals (given the second ARM chip wont have anything else assigned to it other than generating these higher frequencies)?

JacobEdward:

--- 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.

JacobEdward:

--- Quote from: iamdarkyoshi on February 23, 2015, 06:12:05 pm ---If you want a good play with inductors, build a joule thief and then try to modify it yourself to operate a flourescent tube instead of an LED. it can be done, but tounge angle is important  :-/O

--- End quote ---

Do you know of a really good tutorial on Joule thief's for beginners?  Something that has a basic set of listed parts I can find cheaply and experiment with?

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