Dave Osborne wrote:
Vortex5 wrote:
I am struggling to find miniature 240V indicator lamps (neon or LED)
that are sufficiently small to install into a standard depth wall
plate - like MK LOGIC.

All the parts available from MAPLIN are simply too long (30mm+) to be
elegantly used. IDEALLY I am looking clip in lamps with integral
resistor and insulated flying leads.

Any suggestions?

[BTW the application is to make a diagnostic light panel to go near my
CH wiring centre so I can clearly see what is going on at any point in
time with the various stats, pumps and timers etc. This will need
multiple indicators.]




OK, here's a bodge. If you take a double-pole[1] illuminated rocker
switch, it will have four terminals Lin, Nin, Lout and Nout. If you
connect mains across Lout and Nout the integral neon will light.

So,just to be clear, you ignore Lin and Nin and the position of the
switch is irrelevant. You could superglue the switch into one position
to avoid confusing stupid people.

e.g. http://cpc.farnell.com/SW01122

Solder flying leads on and use heatshrink to insulate.

Less than a quid each. :-)

You can get neon indicators to match rocker switches, but none of the
usual suspects stock them any more.

Finally, be aware that neons will illuminate on the merest hint of
current, including the leakage current of solid-state relays, so be
careful in your design to make sure that your neons are showing what you
think they are showing ;-)



[1] You could use a single-pole three-terminal illuminated rocker, which
will be Lin, Lout and N. Use Lout and N.
N.B. Check that the measured voltages will be 230V and 0, a 3 way valve
has a back feed on some of it's inputs for instance..