Thank you John,
As I said previously, I have a lot of difficulty with ascii
schematics. I
copied the complete post and will have to go thru it slowly to try
and
understand it. Is there a site I can visit for a tutorial on ascii
schematics? I am seeing more and more of them lately. I just don't
understand what some of the symbols mean and how they are connected.
---
It's fairly easy, but different folks use slightly different
conventions sometimes, so it gets confusing. Basically, here's what
I
do:
|
|
Vertical wire: |
|
|
Horizontal wire: ---------------
| |
| |
Wires crossing but not connected: ---|--- or -------
| |
| |
|
|
Wires connected: ---+-+---
|
|
2-leaded components:
Basically, describe what it is with an alpha designation in
brackets,
put some wires on it, and connect it to something.
Horizontal R1
Resistor --[100K]-- or --[100K]-- or --[R1]-- or --[R]--
Vertical R1| | | |
Resistor [100K] or [100K] or [R1] or [R]
| | | |
Horizontal C1
Capacitor --[100µF]-- or --[100µF]-- or --[C1]-- or --[C]--
Show polarity where needed, like for electrolytic capacitors:
C1 + |+
--[100µF]-- or [100µF]
|
and diodes:
A = Anode
K = Cathode = >
K |A
--[1N4000>]-- OR --[1N4000]-- OR [1N4000]
|
For transistors and FETs, label the terminals and put in aything
else
you need to :
| |
Q1 C D
---B NPN ---G
2N4401 E 2N7000 S
| |
For opamps and comparators:
---|+\
| >--
---|-/
For larger blocks, identify the part, label the connections and
enclose them in a box. I like to use +'s for the corners, other
folks
use dots or single quotes or commas. Add pin numbers if you like,
or
whatever will make your meaning clear
+---------+
----|TR- |
----|TH OUT|----
----|D |
+---------+
555
For switches:
____
---O O--- or ---> |
|
O
Then just hook it all up:
+12 +12 +12
| | |
[10K] [10K] 555 [1M]
| | +---------+ |
| <--+-[0.1µF]-+----|TR- OUT|---|---->OUT
| | | |
O | DIS|---+
| | | |
GND | TH|---+
+---------+ |+
[1µF]
|
GND
That's a 555 timer which puts out a pulse about 1 second long each
time you press the switch.
Also, there's a free ASCII schematic drawing program out there which
a
lot of people use to post stuff to the non-binary newsgroups. I
forget what its name is (Andy's something-or-other, I think) and the
link to it, but I'm sure somebody will post that info if you ask for
it or if they read this.
