Yes, if it is an LED. No, if it is incandescent.Without further information, at a guess, I would say you need a fly back diode on the relay coil.
If it is a poorly chosen incandescent, the back EMF pulse could kill it as the filament weakens.Yes, if it is an LED. No, if it is incandescent.
A neon is no use at 24V.I would say back emf from the relay K1 is causing the bulb to blow, try using a Neon .
Where does it say he's using 24V?A neon is no use at 24V.
His second, attached schematic shows +24V with similar circuit. So which is it, 24V or Line voltages? Hence the ambiguity in the question.Where does it say he's using 24V?
The drawing shows L & N.. which suggests that the voltage 120/230AC.
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