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Led orientation

Started by Jules, April 29, 2015, 10:39:53 AM

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Jules

Hi, I have a bit of a noob question I was hoping someone could help me with.
I am building the Sparklehorn need to know which way to orientate c8 and c9.
They are LEDs that are in the circuit.
Does the long or short leg of the LED go in the square pad?
Do all madbean Pcbs follow The same rule in regards to this?
Thanks for any help

march500

You mean D8 and D9 right? Long side is the cathode (generally) the flat side of the LED itself is the anode. The long lead (cathode) goes in the square pad.

Jules

Yeah sorry meant d8 and 9. Thanks for the answer.
I was building a Non Madbean PCB last week and it was the opposite to that (short leg to square pad).
i had to de solder and fix later.
It seems it might vary a bit depending on the Pcb.
All Madbean boards follow the same practise I assume (long leg to square pad).
Thanks again

rullywowr

Quote from: Jules on April 29, 2015, 12:09:53 PM
Yeah sorry meant d8 and 9. Thanks for the answer.
I was building a Non Madbean PCB last week and it was the opposite to that (short leg to square pad).
i had to de solder and fix later.
It seems it might vary a bit depending on the Pcb.
All Madbean boards follow the same practise I assume (long leg to square pad).
Thanks again

Quote from: march500 on April 29, 2015, 10:58:58 AM
You mean D8 and D9 right? Long side is the cathode (generally) the flat side of the LED itself is the anode. The long lead (cathode) goes in the square pad.

I think you actually meant to say that the long leg of a LED is the Anode (+) and the short leg the Cathode (-).   The Cathode (-) is also the flat side of an LED.  It is true that the long leg (Anode +) typically goes into the square pad on most pedal projects.

:)




  DIY Guitar Pedal PCB projects!

march500

Quote from: rullywowr on April 29, 2015, 04:26:51 PM
Quote from: Jules on April 29, 2015, 12:09:53 PM
Yeah sorry meant d8 and 9. Thanks for the answer.
I was building a Non Madbean PCB last week and it was the opposite to that (short leg to square pad).
i had to de solder and fix later.
It seems it might vary a bit depending on the Pcb.
All Madbean boards follow the same practise I assume (long leg to square pad).
Thanks again

Quote from: march500 on April 29, 2015, 10:58:58 AM
You mean D8 and D9 right? Long side is the cathode (generally) the flat side of the LED itself is the anode. The long lead (cathode) goes in the square pad.

I think you actually meant to say that the long leg of a LED is the Anode (+) and the short leg the Cathode (-).   The Cathode (-) is also the flat side of an LED.  It is true that the long leg (Anode +) typically goes into the square pad on most pedal projects.

:)



Argh! Yeah sorry confused it with my chemistry background where a cation has a positive charge😀