Working on a Wigl board and ran out of 3mm LEDs. I had enough for D2 and D3 but wondering if a diffused 5mm red will be ok for LED3 which drives the photocells. Any potential problems with that or should I just be patient and order more 3mm leds?
Yes, that's fine. The 3mm specification is just because it is smaller in footprint. There's no functional difference between the two different sizes. A long as the 5mm clears the enclosure lid you are fine. And, I'm all but certain it will.
Excellent, thank you! I'm using a 1590b enclosure anyway so I have plenty of room!