I was using "DS" in the early 1970's and that was based on a copy of
some old mil standards that were all ready several years old
(unfortunately I did not get the copy of the standards when that
division of the company that job was with was eliminated). I believe the
use of DS dates to the 1950's or earlier.
On 8/1/2013 10:00 AM, Ben Jordan wrote:
> The IPC standard takes the IEEE 315-1975 as the baseline. That's the
> earliest source I know of which clearly calls for DS.
>
> In the past I have used D, LD, LED.
>
>
> On Thu, Aug 1, 2013 at 9:15 AM, Gebhardt, Bill <[log in to unmask]>wrote:
>
>> Referring to IPC-2612-1, Appendix A: DS is for display, lamp or light
>> emitting diode.
>>
>> Best regards,
>>
>> B-)
>>
>> Bill Gebhardt, C.I.D. +
>> PCB Designer
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>> -----Original Message-----
>> From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Jack
>> Olson
>> Sent: Thursday, August 01, 2013 8:34 AM
>> To: [log in to unmask]
>> Subject: [DC] Informal Poll
>>
>> Just out of curiosity, what Reference Designator (or "Class Designation
>> Letter", for you purists!) are you using for an *LED*?
>>
>>
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