Timeline for Whats the standard for denoting the orientation of an LED on a PCB?
Current License: CC BY-SA 3.0
8 events
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| Jan 12, 2016 at 22:42 | history | edited | Armandas | CC BY-SA 3.0 |
Changed the link to the updated guide document.
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| Jan 12, 2016 at 5:57 | comment | added | MarkU | Be careful with these SMT diodes, some of them have a prominent bar marking on the (+) terminal, exactly opposite to where a through-hole diode would have its cathode bar. Surprise! Be sure to look at the datasheet for the LED you're using. | |
| Jan 12, 2016 at 0:27 | comment | added | Krunal Desai | I have seen 'K' used more frequently than 'C' -- C is often a capacitor prefix is the reason I think folks try K out there. For SMT packages, I do 'K', for through-hole I draw the symbol of the diode under it's footprint and then also mark with a 'K'. | |
| Jan 11, 2016 at 19:30 | comment | added | rdtsc | Oops I meant Cathode. | |
| Jan 11, 2016 at 19:21 | comment | added | Armandas | @rdtsc It all looks good, at least in this drawing: kicadlib.org/modules/BW_Dioden_SMD_RevA_06Sep2012.pdf | |
| Jan 11, 2016 at 19:19 | comment | added | Armandas | @rdtsc Really? Marking the anode on the PCB is quite unconventional, especially since most components have a "Cathode Band" marking. | |
| Jan 11, 2016 at 19:13 | comment | added | rdtsc | In the KiCad libraries, the SMD diode anode is marked with a wider or heaver silkscreen outline on that side. For through-hole LED's, a silkscreen line matching the flat edge is commonly seen. [Edited by a moderator.] | |
| Jan 11, 2016 at 19:06 | history | answered | Armandas | CC BY-SA 3.0 |