Pages: [1]   Go Down
Author Topic: LED and resistor placing (n00b question)  (Read 821 times)
0 Members and 1 Guest are viewing this topic.
0
Offline Offline
Jr. Member
**
Karma: 0
Posts: 63
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi,

Say you have the super simple schema with only a single LED and a resistor. I was wondering if it's important to put the resistor before the LED? Would it burn if I link the 5V to the LED, the LED to the resistor and the resistor to ground?

It's a very basic electronics question, I know... Thanks!
Logged

Lancashire, UK
Offline Offline
Edison Member
*
Karma: 8
Posts: 1992
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Before or after, it makes no difference.
Logged


Manchester (England England)
Offline Offline
Brattain Member
*****
Karma: 514
Posts: 31550
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Look up the concept of components in serese. The current flows through both devices, so the order  is not important.
Logged

0
Offline Offline
Jr. Member
**
Karma: 0
Posts: 63
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Thanks guys! I can simplify my schema now...  smiley-cool
Logged

Central MN, USA
Offline Offline
Tesla Member
***
Karma: 65
Posts: 6935
Phi_prompt, phi_interfaces, phi-2 shields, phi-panels
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Just don't connect two LEDs to the same resistor. One may be brighter than the other while both are dim.
Logged


Manchester (England England)
Offline Offline
Brattain Member
*****
Karma: 514
Posts: 31550
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
I can simplify my schema now
I can't see how you are going to simplify anything, you can make the layout easer but you still have the same number of components.
Logged

SW Scotland
Offline Offline
Edison Member
*
Karma: 13
Posts: 1325
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

As others have said, it matters not which comes first.  However it is convention that a current limiting device (the resistor) is generally shown in the circuit before the device it is controlling (the LED).   
Logged

Western New York, USA
Offline Offline
Faraday Member
**
Karma: 26
Posts: 4119
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
Just don't connect two LEDs to the same resistor.
That's a pretty broad statement since it's OK if they are all in series.

Quote
One may be brighter than the other while both are dim.
I figured this part out, but it wasn't easy. 

Don
Logged

Pages: [1]   Go Up
Jump to: