Gary Thompson wrote:
Too many engineers on this list...
Hey now, I stayed clear of the whole wheel bearing thing ;-p
John
'79 300SD
If you want certainty, you can only have one engineer or any other
professional. If you have 15 you will never be sure, but you do have a
better chance of getting things right.
BillR.
- Original Message -
From: John Robbins [EMAIL PROTECTED]
To: Mercedes Discussion List
Does that certainty apply to knowing the time? (if you have 3 watches,
which one is correct??)
Werner
- Original Message -
From: BillR [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Saturday, March 10, 2007 5:07 PM
Subject: Re: [MBZ] Resister to lower
They are jarring. But that's part of why they work well. It tends to
get
people's attention more.
There's such a thing as too much attention. A brake light should
not require you to yank your eye right to it, I prefer seeing it
by peripheral vision, so I can still look out for other things.
Right! I have a Radio Shack 12v red LED across the mono valve to tell
me when it's open or closed (bad ACC push button panel that I haven't
fixed yet). It's been there for a good six months or more - still
works.
On 3/8/07, Rich Thomas [EMAIL PROTECTED] wrote:
I bought a couple of 12V LEDs a
OK Don [EMAIL PROTECTED] writes:
Right! I have a Radio Shack 12v red LED across the mono valve to
tell me when it's open or closed (bad ACC push button panel that I
haven't fixed yet). It's been there for a good six months or more -
still works.
On that topic, are you supposed to be able to
ALEX!; if you figure out the resister, (the value ) to use on the LEDS,
could you share it with us???; is it used to lower voltage, current or
BOTH!?;
thanks, Steve
ALEX!; if you figure out the resister, (the value ) to use on the LEDS,
could you share it with us???; is it used to lower voltage, current or
BOTH!?;
It lowers both, but its primary purpose is to limit the current.
(This being generally true of electrical items. It is the flow
of current that
If you use only a resistor, you will have to seriously under power the
LED to prevent killing it. For design purposes, you should plan on
seeing 60V spikes in an automotive electrical system. These are caused
by suddenly disconnecting a current source from the charging circuit.
Resistive lighting
If you use only a resistor, you will have to seriously under power the
LED to prevent killing it. For design purposes, you should plan on
seeing 60V spikes in an automotive electrical system. These are caused
by suddenly disconnecting a current source from the charging circuit.
Resistive lighting
I've seen experienced electrical engineers make the same mistake, and
I've seen the companies they work for suffer because of having to live
with the consequences. If you are just playing around in your backyard
then toss in a series resistor. If it dies, you are out a few cents
and some time.
Jim Cathey wrote:
LED's are commonly seriously overdriven in multiplexed display
operations. Huge current spikes that would fry them if continuous.
But they're intermittent, as are the load-dump spikes in an automotive
system.
Thats what I think would happen too. If you're lucky enough to
dave walton wrote:
I've seen experienced electrical engineers make the same mistake, and
I've seen the companies they work for suffer because of having to live
with the consequences. If you are just playing around in your backyard
then toss in a series resistor. If it dies, you are out a few
Agreed. They have 12v automotive applications for LED's all over. I've
bought some LED trailer lights. Guess what? They work. Much better than
regular ones too. I'd be willing to bet they'll last a lot longer than
regular bulbs...
Come to think of it, I seem to recall an old electronics
Agreed. They have 12v automotive applications for LED's all over.
I've
bought some LED trailer lights. Guess what? They work. Much better
than
regular ones too.
I hate them. But if they'd just put some soft-start logic in
there for the brake light function I'd be happy again. I just
Levi Smith wrote:
They are jarring. But that's part of why they work well. It tends to get
people's attention more. I don't have them on my car, But I agree, on a
dark night when you're directly behind someone they sometimes seem a little
too bright, but they certainly get my attention more
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