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Brightness Check

A project log for KAN-15 LED Tactile Switch

A satisfying clickity on/off switch for your PCB projects

JeremyJeremy 09/11/2020 at 00:180 Comments

Now that I created 3D printed shims for the LEDs to nestle under, I was really curious which LED configuration would have the best & brightest light distribution. So I threw together a test board. 

Here's the board. Each one encapsulates both LEDs and resistors under the switch. Starting from left to right:

Which one do you think was the best?

Drum roll...

For me, the winners (by a small margin), were the right three (single 0603 LED).

Caveat

But, to be honest, it wasn't a fair fight. The brightness of the 0805 LED is spec'd at 150mcd while 0603 is a mere 60mcd. So I'm confident that if you brought the brightness of the 0805 down, it would perform as well as the others.

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