If the reference designators are controlled from the schematic a common
practice especially when there are many sheets is to assign a range of
numbers for each sheet. For example on sheet 1 resistors will be assigned a
range from R1-99 on sheet 2 R200-299, and so on. This makes it easier to
locate a component when having to shuffle through many schematic sheets
because the page number is included in the naming of the reference
designator. With the cross-probing capabilities of most EDA software today
it is equally as easy if not easier to locate a component either on a
schematic or a board regardless of where it is or how it was named.

Best Regards,

Tim Mullin - Regional Director
INCASES North America, Inc.
Tel: 253-853-3860  * Fax: 253-853-3861
Email: [log in to unmask]  *  http://www.incases-us.com

> -----Original Message-----
> From: Hope Lariosa [SMTP:[log in to unmask]]
> Sent: Wednesday, October 20, 1999 9:09 AM
> To:   [log in to unmask]
> Subject:      [DC] component numbering
>
> Is there a 'standard' on how to number components?
>
> I'm referring to the way reference designators for components are placed.
> If people (engineer, designer, assembler, technician) want to see a Right,
> Down method, would that apply to the schematic or the board?  If there is
> no stanrdard, I'm sure it all boils down to whatever the people involved
> agree upon.
>
> I was wondering what the popular concensus is...anyone?