Ref : Neon Novelties
Fault : One one Neon in each of the three panels lit up. The actual one moved a few times. Likely only enough current was flowing to light one neon after which there wasn't sufficient current to keep the voltage above the strike voltage. I must have miscalculated the resistances erring on the high side. I wonder if the variation in the current draw / strike voltage is such that there is a limit to the number that can be run off a single dropper resistor? Might have to break each segment into separate zones?
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Recalculate : Each indicator uses 0.2 mA so at 240 - 80 = 160 volt :
4 = 24 indicators or 5mA 32 k Ohm
2 = 25
0 = 33 or 6 mA or 27 k Ohm
240 = 32
at about 1.0 watts or about 4 1/4 watt resistors... might have to mount them artfully on the circuit board to get it done. I don't want to go shopping for 3 resistors.
4 = 24 indicators or 5mA 32 k Ohm
2 = 25
0 = 33 or 6 mA or 27 k Ohm
240 = 32
at about 1.0 watts or about 4 1/4 watt resistors... might have to mount them artfully on the circuit board to get it done. I don't want to go shopping for 3 resistors.
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4 = 24 indicators or 5mA 48 k Ohm
2 = 25
0 = 33 or 6 mA or 40 k Ohm
240 = 32
at about 1.5 watts or about 8 1/4 watt resistors... might have to mount them artfully on the circuit board to get it done. I don't want to go shopping for 3 resistors.
There will need to be a 330 Ohm resistor in the GPO where the wiring comes from as a fuse in case of a short.
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