| Electronics > Projects, Designs, and Technical Stuff |
| Shining leds through the PCB |
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| MarkR42:
Can you just mount a normal SMD led upside down (a bigger one e.g. 1206), and route out an area for the lens? The ones I've got have a sticking up lens element. Maybe there are totally flat ones also, which could just be mounted upside down with a few holes underneath? Update: Kicad has a footprint which does just that, called LED_SMD:LED_1206_3216Metric_ReverseMount_Hole1.8x2.4mm |
| DuPe:
maybe soldering a standard led on the bottom (solder) side of pcb would do the job? |
| mikeselectricstuff:
A side-firing LED, next to a hole in the copper and resist works quite well |
| Fred27:
--- Quote from: 3roomlab on May 09, 2019, 04:07:47 am ---assume the FR4 have light transmittance of 1%, your best hope of seeing anything is to use the brightest LED, which means there isnt much choice. --- End quote --- I've used reverse mount LEDs through PCB. It works just fine - in fact brighter then I expected. The one I used was an RGB version of the one pictured above. UPDATE: This page contains a video where you can see how it looks. Easily visible in daylight. https://www.element14.com/community/community/project14/nfc-rfid/blog/2019/04/28/locknfc-does-the-pcb-work |
| thinkfat:
--- Quote from: mikeselectricstuff on May 09, 2019, 10:50:16 am ---A side-firing LED, next to a hole in the copper and resist works quite well --- End quote --- Reasonably priced in 100s quantities, too :) |
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