From: Lizard Blizzard
Subject: Re: Best way to power array of LEDs?
Date: Fri, 13 Dec 2002 17:25:13 -0800
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <firstname.lastname@example.org>
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Frank Bemelman wrote:
> "John Woodgate" schreef in bericht
>>I read in sci.electronics.design that Spehro Pefhany
>> wrote (in >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.
> Frank Bemelman
> (remove 'x' & .invalid when sending email)
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