Any suggestions for mounting 3 mm LEDs effectively and simply in control
panels? I've been thinking of just using brass or aluminum tubing with the
proper ID that the LED could fit into (use a bit of epoxy at the 'base' of
the tubing to hold the LED permanently in place.
Does depend on what you are using for your panel. I use white finish
hardboard and just drill 3mm holes and push the LEDs in. Haven't
needed to use glue yet but a dab of UHU or similar would hold any that
were a bit loose.
Rather than using tube there are bezels sold for the purpose which
will hold the LEDs neatly without glue.
eg Rapid Electronics part 55-0160 at 5p each or 55-0270 in chrome at
28p each. There is a bigger choice for 5mm LEDs.
Make friends in the hobby.
Garratt photos for the big steam lovers.
If you have the right "number" drill bit (~ #31 or #32), and depending on
the control panel material, you can press them into holes that are an
interference fit. It doesn't get much more effective and simple than that.
There's a whole family of inexpensive little cylindrical plastic
bezel-clip rings that are designed for the purpose. There are several
makes and styles of these. They come in several sizes to fit the common
LED's. Any decent electronics supply should either have them, or can get
them. Digi-Key, for one source, has many types of these for about 20-40
cents each in small quantities.
Some of these include a color-cap for the LED (normally choose one the
same color as the LED ... you can't color-filter an LED to a different
color). This sometimes looks nicer in a panel.
You just insert the LED into the clip or cap until it 'snaps' in, then
press the clip into an appropriate sized hole in the panel (it also
'snaps' in). The clip is removeable, and reuseable, within reason.