Re: Any good how-to's out there on understanding schematics?
- From: martin <martin.reynolds@xxxxxxxxx>
- Date: Wed, 3 Sep 2008 21:17:47 -0700 (PDT)
On Sep 3, 7:20 pm, btrip <bryont...@xxxxxxxxx> wrote:
On Sep 3, 2:37 pm, e...@xxxxxxxxxxxxxxxxxxxx wrote:
Can anyone point me towards a good online or offline tutorial on
understanding schematics?
I understand the basic components and what they do. I'm getting a
little confused when the circuits branch off and/or reconnect back on
themselves, with some branches having resistors and others
transistors. I'm looking more for the theory on how the different
components work together.
Specifically I'm working on a power supply board where the power in
branches out to 3 different voltages out (to a display). One of the
voltages is bad, the other two are fine. I'm having trouble isolating
exactly which paths the current follows so I can eliminate what is
working and focus on what may not be working.
Thanks!
Oh! I forgot this totally awesome resource... duh.
http://www.tech-systems-labs.com/navy.htm
The Navy's Electronic Training Course!
Goes down to the atomic level. Very neat stuff.
Something worth adding is that there are two very different kinds of
circuits - digital and analog.
Digital circuits use little logic devices that have inputs and outputs
that are either on or off. They often synchronize with a clock
signal . Once you understand those two pieces, you can start
troubleshooting even if you don't fully understand the functions. A
bad signal will look bad. Digital logic is what most engineers seem to
do. It is fundamentally simple, but tends to have lots of parts.
Analog circuits appear in power supplies, sound boards, driver boards
and that rather clever servo system in the Corvette pinball engine.
When you get to analog, we're talking calculus. Signals have complete
variability. And they fold back on each other: there can be several
things happening on one signal. So the circuits are much more complex
to understand, but have fewer parts.My experience is that good analog
engineers are quite rare compared to digital engineers.
And the way that you really learn to read schematics is by
understanding how each component works, then you'll understand how
they fit together.
.
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