electronics question
#1
electronics question
it's been abotu 20 years or so since i've needed to know what was what and why they are called what they are called, so this morning i've got some questions to prepare me for the weekends activities
led's
what are the 2 legs called?
and which one is the positive? the longer one right?
resistors
which way do they flow? towards the single line right?
i know i could google the answers but i'm crap at that and none of the sites i've looked at have given me the answers i'm after
so thanks kind chaps and chapesses for answering
led's
what are the 2 legs called?
and which one is the positive? the longer one right?
resistors
which way do they flow? towards the single line right?
i know i could google the answers but i'm crap at that and none of the sites i've looked at have given me the answers i'm after
so thanks kind chaps and chapesses for answering
#2
LED, have ANODE and CATHODE
ANODE = POSITIVE, CATHODE = NEGATIVE.
Resistors ?, I assume from single line you mean RECTIFIER DIODES ?, if so the line depends on which way you want current to flow/not flow.
If flows easy through the line nearest but not the other way.
Resistor orientation is unimportant as they don't have one, they work either way.
tabetha
ANODE = POSITIVE, CATHODE = NEGATIVE.
Resistors ?, I assume from single line you mean RECTIFIER DIODES ?, if so the line depends on which way you want current to flow/not flow.
If flows easy through the line nearest but not the other way.
Resistor orientation is unimportant as they don't have one, they work either way.
tabetha
Last edited by tabetha; 08-01-2009 at 09:22 AM.
#3
Too many posts.. I need a life!!
iTrader: (1)
Join Date: Jan 2008
Location: Crawley, West Sussex
Posts: 974
Likes: 0
Received 0 Likes
on
0 Posts
resistors flow both ways, so no polarity. The Single line is normally gold, which shows the tolerance of the resistor value. There are other colours but ive forgotten them lol
#6
Audio specialist
if you look into the LED one leg will be connected to a much larger plate inside the actuall led, this is the cathode so the larger plate is the negative and the tiny plate is the positive,
thats how you find out if the legs have been trimmed down.
thats how you find out if the legs have been trimmed down.
#7
Audio specialist
Trending Topics
#8
yup, longer ones are connected to the smaller plate so that's fairly easy for the led's
the resistors thoguh:
they've got 5 lines on them, 4 do the vaule if i can remember that far back and the other line should be gold silver of bronze to tell you somethign else corect?
these don't though
they've got a red line, then a gap, then 2 black lines, a grey line and another red line grouped together
they shuold be 270ohms
but which waydo i solder them?
the resistors thoguh:
they've got 5 lines on them, 4 do the vaule if i can remember that far back and the other line should be gold silver of bronze to tell you somethign else corect?
these don't though
they've got a red line, then a gap, then 2 black lines, a grey line and another red line grouped together
they shuold be 270ohms
but which waydo i solder them?
#13
Thread
Thread Starter
Forum
Replies
Last Post