Replacing Old LEDs

[Chuck Guzis]

RS's prices are pretty high for commodity LED's.  You might just want to
get the assortment of 20 for  $2.59.  Most of them are going to be red,
anyway: 

276-1622

You don't need the 12 volt model--it has an internal current-limiting
resistor; the forward voltage on most of these isn't going to get much
higher than about 2V at 20 ma.

The following should work just fine:

 276-026
 276-041

Cheers,
Chuck