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Author Topic: Farish Class 25 headcode LED wanted  (Read 412 times)

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Offline Paul-H

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Farish Class 25 headcode LED wanted
« on: January 05, 2018, 11:01:15 pm »
Hi  all

I have  recent modrl Farish class 25 that has lost one of its headcode LED's, it's a tiny surface mount one.

Anyone know what spec I should be looking for in a replacement and or a supplier that supplies such tiny surface mount LED's

Thanks

Paul
Please excuse any poor spelling, I am Dyslexic, just think yourself lucky if you can actually read what I typed.

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Offline Dr Al

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Re: Farish Class 25 headcode LED wanted
« Reply #1 on: January 06, 2018, 11:13:35 am »
Those I've replaced before IIRC were 0603 SMD LEDs, any standard ones will do, and you probably need yellow for this particular unit.

Cheers,
Alan
« Last Edit: January 06, 2018, 02:00:07 pm by Dr Al »
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline ntpntpntp

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Re: Farish Class 25 headcode LED wanted
« Reply #2 on: January 06, 2018, 01:57:42 pm »
Those I've replaced before IIRC were 0602 SMD LEDs


0402 or 0603 ??
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline Dr Al

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Re: Farish Class 25 headcode LED wanted
« Reply #3 on: January 06, 2018, 02:00:27 pm »
Oops, typo - 0603 (amended in post above).

Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline Paul-H

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Re: Farish Class 25 headcode LED wanted
« Reply #4 on: January 06, 2018, 07:30:21 pm »
Thanks Guys

Great help as always

Got a few on order, hope my micro soldering skills are up to it  8)

Whilst on the subject, with these tiny LED's how do you tell which end is positive, had a look at the one at the other end under a loupe  and cannot make out any indication for anode or cathode, PCB is marked + for one end but what end is + how do I tell ?

Thanks again for all the help

Paul
Please excuse any poor spelling, I am Dyslexic, just think yourself lucky if you can actually read what I typed.

All tiepin as bean spell chequed on mi Pea Sea

Offline ntpntpntp

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Re: Farish Class 25 headcode LED wanted
« Reply #5 on: January 06, 2018, 08:04:48 pm »
...with these tiny LED's how do you tell which end is positive, had a look at the one at the other end under a loupe


The ones I have show a triangle mark underneath
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline Paul-H

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Re: Farish Class 25 headcode LED fitting - useful sticky tool
« Reply #6 on: January 12, 2018, 02:24:24 pm »
The LED's arrived this morning, bought a strip of 25 as I know how hungry my carpet monster is  ;)

Had a few of these from my military modelling days still in the tool box http://www.pinflair.co.uk/pinflair-sticky-pick-up-tool which made holding them in place whilst i soldered them and after buying 25 sods law would have it the first one went on without issue

So headcode lights back to working at both ends again

Thanks again for the help guys

Paul
« Last Edit: January 12, 2018, 08:08:22 pm by Railwaygun, Reason: title expanded »
Please excuse any poor spelling, I am Dyslexic, just think yourself lucky if you can actually read what I typed.

All tiepin as bean spell chequed on mi Pea Sea

Offline Delboy

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Re: Farish Class 25 headcode LED wanted
« Reply #7 on: January 12, 2018, 03:01:11 pm »
Thanks for the link Paul.
That's a nifty little tool.
Dennis.
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Online Yet_Another

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Re: Farish Class 25 headcode LED wanted
« Reply #8 on: January 13, 2018, 02:56:16 pm »
Yep, thanks, I've just ordered one too!
Tony

'...things are not done by those who sit down to count the cost of every thought and act.' - Sir Daniel Gooch of IKB

 

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