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fritzing / fritzing-parts

Electronic components for use in the Fritzing app (aka the parts library)
http://fritzing.org/parts
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LED marks for anode and cathode in PCB view? #268

Open KjellMorgenstern opened 4 years ago

KjellMorgenstern commented 4 years ago

The markings for the generic and the 10mm LEDs in Fritzing differ. They don't have a datasheet attached that could be followed. Therefore, I think they should at least use the same marking system. Another solution would be to offer variants with differnt copper / silkscreen.

The 5mm LED: Anode: Round pad, at flat side Cathode: Square pad, at round side

The 10mm LED (sparkfun) Anode: Square pad, at flat side Cathode: Round pad, at round side

According to https://electronics.stackexchange.com/questions/210753/whats-the-standard-for-denoting-the-orientation-of-an-led-on-a-pcb Anode: Round pad, round side Cathode: Square pad, flat side

The electrolytic capacitor Anode: Round pad, flat side, + sign Cathode: Square pad, round side, no sign

LED6 is the sparkfun 10mm LED5 is the 5mm core part image image

cjdg commented 4 years ago

why dont use the common markings for capacitors?

KjellMorgenstern commented 4 years ago

@cjdg Can you refer to standard or widely used document? Similar to the LEDs, Fritzing is using various capacitors. It might depend on the manufacturers specification, but where possible we should of course align them:

image

image

cjdg commented 4 years ago

https://www.tips.modularparts.net/led-polarity-orientation-pcb/ "mostly" everybody agrees with this