2 Jan
2008
2 Jan
'08
9:12 p.m.
On Wednesday 02 January 2008 22:50, Gene Buckle wrote:
Why I salvage all sorts of parts...
I've got one of those as well - it never shows a state change. I tried
that first.
Well, there ya go then.
Both plus and minus 12V? You do need both.
If there's no change in the LED indicator, and the input that drives it is
changing, then yeah, it's probably toast.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
On Wednesday
02 January 2008 22:10, Gene Buckle wrote:
I actually used a little light bar I have that has 3 12V LED assemblies on
it. I ended up using this after my resistor decade box died on me and I
couldn't find a 500 Ohm resistor. :) I used an LED to watch the output on the 1488.
With an appropriate current-limiting resistor I would assume? The LED lights the instant I attach it to the output
and doesn't flicker
or go out when I reboot the computer to make it send data out the port.
The little tester I have for rs232 stuff uses bi-color LEDs, makes it
easier to see what's going on. Could be,
I've certainly replaced my share of those. And put sockets in
while I was at it. :-) Just make sure it's getting the proper power
supplies, as if one or both of them are missing you won't see proper
output then, either.
I did check the power first. :) 12V like it's supposed to be. If I have
to pull the board, I'll certainly put in a socket. :)