[hpsdr] SMT LEDs Help

[Graham / KE9H]

Pat:

No.  You have negative and positive voltages that are being monitored

D1, D2, D3 green dots toward the edge of the board

D4, D5, Green dots away from the edge of the board

--- Graham

==

Pat McGrath wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Thanks
>
> On the Atlas board are all the LED cathode on the same side?
>
> ----- Original Message ----- From: "Graham / KE9H" <KE9H at austin.rr.com>
> To: "Pat McGrath" <ka6tya at arrl.net>
> Cc: <hpsdr at lists.openhpsdr.org>
> Sent: Saturday, July 10, 2010 1:10 PM
> Subject: Re: [hpsdr] SMT LEDs Help
>
>
>> Pat:
>>
>> Someone else sent you the data sheet.
>> The marking is a green dot or bar on either side of one end of the part.
>>
>> Please understand that the green dots actually mark the end of the part
>> with the die.  On this RED LED, this happens to be the anode.
>>
>> On the equivalent YELLOW and GREEN LEDs used by HPSDR,
>> the green dot still marks the end with the die, which happens to be 
>> the cathode.
>>
>> :-)
>>
>> --- Graham
>>
>> ==
>>
>> Pat McGrath wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> I need to identify the marked end for a LTST-C170CKT SMT LED.
>>>
>>> How do I know the madked end?  What should I be looking for?
>>>
>>> What is the best way to identify the Anode and the cathode ?
>>>
>>>
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