Concise Electronics for Geeks (2010)(lcamtuf.coredump.cx) |
Concise Electronics for Geeks (2010)(lcamtuf.coredump.cx) |
It's about an hour's worth of material and it is very concise.
Also here in Youtube playlist format: http://www.youtube.com/watch?v=8gvJzrjwjds&list=PLzqS33DOPhJ...
Another great channel for electronics basics is TheGreatScott: https://www.youtube.com/channel/UC6mIxFTvXkWQVEHPsEdflzQ
Difficult to see how you can really be just one human.
Everyone wants to talk about the penitential energy and what-not. Though that is mostly pointless unless you grasp the first fundamental concept of voltage. Voltage is just simply the effort exerted by electromagnetic field on neighboring electrons.
As soon as you grasp that all definition of voltage relate to the real world of doing `work` eg... heating, moving then the concept of voltage of amps is a lot easier to understand.
That sounds like you are talking about the _electric field_, which is a vector field. Charged particles feel a force in the direction that the electric field is pointing. This is analogous to the gravitational force field (a vector field pointing towards the ground) and how objects with mass feel a force in this direction.
The electric field has a _potential_ [0] (called the _electric potential_), which is a scalar field. This is analogous to gravitational potential, which coincides with height.
_Voltage_ is the difference between the electric potentials of two points, for example the two leads of a resistor (or other circuit element).
force on electrons is "EMF", https://en.wikipedia.org/wiki/Electromotive_force
This scan be measure in volts, or joules.
"potential difference" seems to be the relative difference between the "EMF" of two conductors, which is analogous to pressure-difference and is the relevant factor wrt current, power, etc.
Another great reference is the Art of Electronics.
Tons a practical advice for selecting components and building circuits that is still relatively relevant even today.
Also, this looks like a really awesome primer!
Although...it is going onto a 'read this soon' list, and I'm probably not alone in that. With these sorts of concise primer articles, have you considered providing a .pdf or .tex of the page?
:-)
I'm not the author, but in the case of .pdf, couldn't you just use a 'Print to PDF' solution? On Windows I've used PrimoPDF before, don't know what OS you use but guessing all the major platforms have something similar.
s/series/parallel/ ??
Capacitance is basically the relation between electric field and charge, whereas inductance is the relation between magnetic fields and currents. Those follow from fundamental equations, if you want a calculus intensive derivation from the "first principles" of Maxwell's Laws. Someone on this thread mentioned Griffiths, which is a good text, it's what I used in E&M undergrad. Wangsness has a good E&M text too I liked.
Ohm's Law is a macroscopic statistical mechanical Law that happens in bulk.
It can be derived from even some of the simplest electron models (eg the very simplistic Druude Model). Where it can be shown that the current density through a chunk of material is proportional to the applied electric field. https://en.m.wikipedia.org/wiki/Drude_model
But it breaks down in smaller systems, where statistical averages don't hold (for example ballistic conductance in a nanowire). Or other systems when quantum mechanical effects will dominate (eg bandgap non-linearities of a PN Junction or Quantum Well, or how the bandgap of a semiconductor causes an increase of resistance at lower temperatures as opposed to decrease of resistance for metals).
I used to have a nice presentation of the latter on my old uni website called A Quick and Dirty Preview to Solid State Physics, but alas they disabled my old account after nearly a decade past graduatiOn. (Had to make the webpage for a class early in grad school, and it was linked by many other solid state physics classes interestingly).
The "first principles" part of E&M has some tricky math which can be mitigated by a well chosen problem domain. If you really want to dive into it, I hope you love (or learn to love) multi-variate calculus, linear algebra, and switching coordinate systems (cartesian, polar, spherical) multiple times to solve a problem.
It's an analogy. That's how analogies work. I was hoping for some substantive reasons the analogy doesn't hold.