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Article #56

Re: Best way to power array of LEDs?

#56
From: Lizard Blizzard
Date: Sat, 14 Dec 2002 01:25
47 lines
3544 bytes
Frank Bemelman wrote:
> "John Woodgate" <jmw@jmwa.demon.contraspam.yuk> schreef in bericht
> news:ZRoDyBCO$j+9Ewv9@jmwa.demon.co.uk...
> 
>>I read in sci.electronics.design that Spehro Pefhany
>><speff@interlog.com> wrote (in <c52kvuc8sut17acevom3dimg06i7d1ffn0@4ax.c
>>om>) about 'Best way to power array of LEDs?', on Fri, 13 Dec 2002:
>>
>>>They have a nasty habit of using nickel-plated PCBs as the stator part
>>>of the switches in cheap DMMs.
>>
>>Yes. It doesn't wear too much, but it builds up a surface film that
>>prevents conduction. Switch cleaner works for a while.
> 
> 
> Giving them away works even better ;)

> (confession: I have a few cheapo's too).

The problem I have is that the meter must be left on for a long time to 
read the thermal drift.  But a wiggle stick meter, which requires no 
power to indicate, will not be accurate enough, so I have to use a 
digital meter of some sort.  But the digital meter eats up the battery 
if I leave it on, and one of the meters shuts itself down after awhile. 
  I guess what I should do is put a battery eliminator on it.  But I'm 
not sure if that is isolated enough.  And it seems that I'm always one 
meter short of making all the measurements.


> --
> Thanks,
> Frank Bemelman
> (remove 'x' & .invalid when sending email)


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From: Lizard Blizzard <NOSPAM@rsccd.org>
Newsgroups: sci.electronics.components,sci.electronics.design,alt.engineering.electrical,aus.electronics,sci.electronics.repair
Subject: Re: Best way to power array of LEDs?
Date: Fri, 13 Dec 2002 17:25:13 -0800
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