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You may have already seen this single-transistor oscillator based on an NPN transistor with an unconventional configuration—featuring a floating base and reversed placement of the collector and ...
Hafner Michl's user avatar
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3 votes
1 answer
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I have a question about the ionization of low pressure neon (inside an indicator light) when put in an oscillating electric field, such as that near a Tesla coil. From reading online about the topic, ...
16-bit-apps's user avatar
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The NE-77 neon glow lamp is like the NE-2 externally but has a third electrode intermediate "trigger" electrode between the power electrodes. The trigger electrode triggers the plasma by ...
James Bowery's user avatar
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9 votes
2 answers
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The photograph shows the printed circuit board from under the cover of this 240V AC indicator lamp. The page description says that the device is a neon indicator lamp, a statement confirmed by the ...
CrimsonDark's user avatar
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1 answer
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So I’m in the neon industry, and the manufacturers of solid state switched mode HV power supplies recommend using the same length of wire for both ends of the secondary, which would require putting ...
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1 answer
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I have a project where I want to make something like a 7-segment display using neon tubes. Using neon tubes is a hard requirement, so I cannot use LEDs etc. I do not want to use one 12 ⇒ 5 kV ...
DarcyThomas's user avatar
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7 votes
2 answers
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I'm interested about whether or not a conventional neon sign such as this one could emit x-ray that could be harmful. The sign that you can see in the picture is just below my office window so I'm ...
Raaas's user avatar
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5 answers
211 views

I'm working with a neon sign transformer and want an indicator (preferably a light) on the high/output side to give me a visual cue when there is current coming out of the transformer. I'm not 100% ...
dwwilson66's user avatar
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13 votes
1 answer
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This is a question about material use specifically in semiconductor manufacturing. CNN's Ukraine halts half of world's neon output for chips, clouding outlook begins: Ukraine's two leading suppliers ...
uhoh's user avatar
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2 votes
2 answers
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I'm putting together an enclosure to hold the transformer and dimmer for a small neon sign. I'm quite comfortable with normal AC/DC stuff, but the output from the neon transformer is super high ...
JeffThompson's user avatar
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0 answers
139 views

simulate this circuit – Schematic created using CircuitLab I see a high voltage (100Vdc-1000Vdc) output when I measure with a voltmeter when the motor just starts to run. I connected a neon lamp ...
Jundullah's user avatar
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1 vote
1 answer
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Please excuse my schematic. This is a Dim-bulb Tester I am building. This is supposed to protect the device under test (DUT) that I will plugin into "outlet", by limiting the current, "...
Musa's user avatar
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I'm restoring an HP 141T and it has a broken neon lamp which is used I believe as surge protection in the following configuration: On the right is the CRT. I believe the only purpose for such lamps ...
cosenmarco's user avatar
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3 answers
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I have been given an old handset for a 700 SRS rotary GPO telephone, with a neon light in the centre. If it is connected across the ringer circuit, should it light up when the bell set is energised by ...
David Chadwick's user avatar
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1 answer
90 views

Electronic air filter circuit board component?
John Hartnett's user avatar
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2 answers
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I am building a totally overkill electronics repair bench for fun while in quarantine. Part of this bench build involves wiring up electrical distribution (i.e., a lighting feature to illuminate the ...
Will Preston's user avatar
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5 votes
1 answer
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Here is the problem I am stuck on. The lamp starts out as an open circuit. Then capacitor charges up and eventually the voltage \$v\$ across the lamp raises. When the voltage across the lamp ...
Georgy Martynovich's user avatar
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2 votes
3 answers
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I’m trying to create a timing light. Due to the lockdown I can’t get any other parts. I have a neon bulb which does light up when I hold it next to the spark plug lead but it is too dim to be useful. ...
Junaid's user avatar
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9 votes
3 answers
5k views

I am new to neon lamps: I just discovered its electronic symbol: I am a little bit confused, What does the dot in the symbol mean? It looks like the neon lamp is polarized. How do I know what lead of ...
Nau's user avatar
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1 answer
106 views

I have bought several adjustable gooseneck shafts with the intent of creating lamps of my own. I have put a brand new 2x0.75mm^2 cable through it and attached a simple E27 light fixture. I have ...
skinny_mike's user avatar
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-2 votes
2 answers
118 views

Is this neon light display real or fake? if real, then how does it work? https://www.youtube.com/watch?v=xlcywgEMuGI
bandybabboon's user avatar
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27 votes
14 answers
16k views

I have a bunch of old neon indicator lamps recovered from old AC devices and used to indicate power status. I wonder: is there any reason nowadays to use the neon lamps instead of LEDs? I see they ...
FarO's user avatar
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0 votes
2 answers
493 views

I'm trying to create plasma fire with 10kV neon transformer, as shown below. The name is SIET METALBOX (10kV 30mA). How do I diagnose the problem? All wires are ok. The issue is that the setup doesn'...
neonlight's user avatar
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I've got a few of these indicator lights from LEECRAFT/VCC, they're marked "tineon 3600" and "125V 1/3W". According to this page: http://wiki.diyfaq.org.uk/index.php/Neon neon lamps require a resistor ...
Joe C.'s user avatar
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2 answers
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I would like to make a Tesla coil, so I bought a 10 kV 120 W 30 mA neon sign transformer from Aliexpress. First potential problem, while playing with it, I noticed that when it stops ...
Guigui's user avatar
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1 vote
1 answer
611 views

I bought a dirt cheap toaster oven to convert to a solder reflow station, and I noticed in the teardown that it apparently has a neon power indicator. It goes out instantly when it loses power ...
AaronD's user avatar
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3 votes
3 answers
1k views

I am looking for a way to test a neon sign to determine the correct power supply size. The power supplies come in a variety of different sizes but the most common are: 6kV and 10kV and a working ...
Jeff's user avatar
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7 votes
2 answers
2k views

I'm organizing a lot of components and don't know what this is. Hooked up to PS at low voltage and nothing happened. I can't tell the anode from the cathode. What is it?
what is this's user avatar
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2 votes
3 answers
3k views

I would like to power neon lamp like NE-2 from low DC voltage like 1.5 V battery. Is it possible to boost low voltage like that to 85-120 volts which is needed for neon lamp? And can i use blocking ...
after's user avatar
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2 votes
1 answer
538 views

I bought some neon indicators from eBay. I want to find a safe way to power them so we can do some experiments on solderless breadboards. I can obviously power them from mains (120VAC/60HZ USA), but ...
Ryan Griggs's user avatar
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14 votes
5 answers
20k views

Neon lamp indicators embedded in power strip switches indicate whether the switch is ON or OFF. When the neon lamp is ON in a dark environment (lights of the room are off), the lamp begins flickering ...
Hamid Rouhani's user avatar
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0 votes
1 answer
227 views

I've done some backlight work for instrument displays using CCFLs and designing custom drivers (12 Vdc to ~1000 Vac) so I have some experience with these designs. Recently a friend of mine was ...
user6972's user avatar
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