Standards of parts naming on PCBs? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 31st August 2005, 01:31 PM   #11
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally posted by AuroraB
Don't really know if such a standard exists, but
R,C,D,Q,L,F,T,P seems to be the most common ones....
Res, Cap, Diode, Transistor, Coil/choke, Fuse, Transformer, Connector..

It differs a bit in which continent you are. In the US, they often use Q for transistors, while in Europe we often see T. U is often used for an integrated circuit, but you also see Q used here. J I think is most often used for connectors, although you also see it for FETs (presumably from "Junction FET"). R, C and D are so standard that I can't remember seeing other uses, although very rare you see CR for diodes specifically in older Japanese and US diagrams (presumably from the old "crystal" days).

For multiple channel systems you often see that they add 100 to all designations, like R122 in one channel would be R222 in another and R322 in yet another channel. P-A's "standard" to use E for resistors in another channel is a sure recipe for confusion (except for him maybe, but then again he DOES publish on this forum).


Jan Didden
__________________
I won't make the tactical error to try to dislodge with rational arguments a conviction that is beyond reason - Daniel Dennett
Check out Linear Audio Vol 7!
  Reply With Quote
Old 31st August 2005, 03:04 PM   #12
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally posted by janneman
P-A's "standard" to use E for resistors in another channel is a sure recipe for confusion (except for him maybe, but then again he DOES publish on this forum).
Since schematic, partslist and layout is 100% connected to each other there is no way to mixup especially when I also have explained this and it is assumed that people should read instructions and so far noone has had any problems with that.

There is actually a standard but the one I know is old and is related to electromechanical designs.

The problem with this standard is that it's very confusing.

D = digital IC
H = analog IC
V or was it Q = transistors, or semiconductors

etc, etc.

One customer at work demanded this pretty weird standard.

My idea was to use letters which aren't used to anything so you must get info what E, G etc stands for.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote
Old 31st August 2005, 03:47 PM   #13
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
P-A,

I don't want to split more hairs than necessary but the thing is that E stands for a voltage controlled current source and G for a transconductance source. Granted that you won't see too much of those on pcb's but in the sim world they are the standard notation for that.

Furthermore E is sometimes used to indicate ohms like K is used to indicate kilo ohms. For instance, on many Philips schematics they used 50E for 50 ohms; you propose E50 for "R"50.

My point is that there are perfectly acceptable and accepted ways to do this. Inventing yet another way, even if you document it (which I think is extra work you're not looking for) has NO advantage but several disadvantages. But hey, if it makes you happy.

Jan Didden
__________________
I won't make the tactical error to try to dislodge with rational arguments a conviction that is beyond reason - Daniel Dennett
Check out Linear Audio Vol 7!
  Reply With Quote
Old 31st August 2005, 08:07 PM   #14
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
My only purpose to do this is to limit the number of characters to 3. Sometimnes I have more than 100 resistors. So if you make a difference between the channels AND limit the characters. How should you do? Pretty many characters are unsuitable and a very few are "free" sort of speaking.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote
Old 1st September 2005, 12:21 AM   #15
Account Disabled
 
Join Date: Aug 2004
Location: Earth
On the subject of standards...

I used to be indecisive but now I'm not so sure!

Cheers,
Greg
  Reply With Quote
Old 1st September 2005, 02:45 AM   #16
AKSA is offline AKSA  Australia
diyAudio Member
 
Join Date: Sep 2001
Location: Melbourne, Australia
Or, Greg, the corollary:

'I was once extremely dogmatic but I'm determined to reform'

Cheers,

Hugh
__________________
Aspen Amplifiers P/L (Australia)
www.aksaonline.com
  Reply With Quote
Old 1st September 2005, 04:22 AM   #17
jcarr is offline jcarr  United States
diyAudio Member
 
Join Date: Jul 2002
Location: Tokyo, Japan
Per:

Quote:
My only purpose to do this is to limit the number of characters to 3.
Why don't you use Chinese characters (ideograms), then?

Quote:
My idea was to use letters which aren't used to anything so you must get info what E, G etc stands for.
Again, using Chinese characters would fulfil your requirements.

hth, jonathan carr
__________________
http://www.lyraconnoisseur.com/, http://www.lyraaudio.com
  Reply With Quote
Old 1st September 2005, 10:03 AM   #18
DRC is offline DRC  United Kingdom
diyAudio Member
 
DRC's Avatar
 
Join Date: Jan 2003
Location: UK (south west)
I love standards, there are so many to choose from
  Reply With Quote
Old 1st September 2005, 01:06 PM   #19
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
you can use the SPICE symbols for components -- understood around the globe -- the term "U" is both integrated circuit and "user-defined component" in some schematic capture and sim programs.

the problem with trying to "standardize" numbering is that once things get messy and all tweaked-up there is the temptation to use the "renumbering tool" -- which will work left to right, top to bottom unless otherwise directed. whenever you "renumber" you also have to remember to "forward annotate" your design in the PCB design program.

some schematic capture programs allow you to dump the "bill of materials" into Excel -- a good way of telling if you have been inconsistent in numbering.
  Reply With Quote
Old 1st September 2005, 05:25 PM   #20
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Couldn't you just reduce the font size so you can fit a designator and three digits?
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Misc. PCBs/Parts Nisbeth Swap Meet 5 22nd April 2009 05:53 PM
FS: Misc. PCBs and parts Nisbeth Swap Meet 32 1st April 2009 08:27 PM
FS: Two DX HDII parts kits and pcbs cwujek Swap Meet 6 28th January 2008 04:01 AM
Aleph 30 PCBs and all parts jeff mai Swap Meet 3 13th November 2006 05:47 AM
PCBs and Parts.... go77306 Swap Meet 0 10th June 2005 11:35 AM


New To Site? Need Help?

All times are GMT. The time now is 02:55 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2