I got a board for which I need several indicator LEDs and I cant decide on the best solution for the mechanical design of these.
a) solder the LED in through holes and bend it 90deg
b) put pad like for a SMD LED to the top and solder the LED flat to these
c) put a pad to the top and the bottom of the PCB (1.6mm PCB fits exactly to a standard 3mm LED)
d) SMD LED with light pipe
e) extend (unnecessarily) the whole PCB 15mm and use a 90deg SMD LED
So here are my questions:
- Did I forget any viable (or even better) solution?
- I want to make about 1000 of these. Is there a major difference in the assembly cost (I guess for example that b should be quit a struggle to solder in the right position)?
- What would be best practice in this case?
- For the 3 through hole LED solution - what is the best practice to cover / isolate the long free LED legs from each other or is this unnecessary?