Questions tagged [lamp]

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5answers
76 views

LED lamp - connecting LEDs in parallel

I have a question about LED lamp: Quantum Board It has 16 strings of LEDs connected in parallel. Each string consist of 18 LEDs connected in series. It's supplied with constant current source (with ...
0
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1answer
41 views

How can I override a capacitive touch on-off switch? [closed]

I bought a floor lamp for use with a mechanical timer that turns electricity on and off using a set schedule (for example, when you're away but want to convince others that you're still at home). ...
0
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1answer
61 views

Are there any design concerns that make an E12 switched socket infeasible?

Sorry if this comes across as a basic question, but this is the first place I thought to come and ask. My wife and I have bedside lamps that have E12 40W sockets with inline switches. My wife hates ...
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2answers
39 views

Use single-pole voltage detector to check for currentflow on a lamp

I am using a single-pole voltage detector to detect if there is a current-flow / potential on the clamps of my ceiling lamp (See device in first picture below). When the ceiling-lamp is ON and ...
2
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0answers
66 views

What is the off-white powdery material found at the base of GU5.3 light bulbs?

I've noticed most GU5.3 light bulbs, both halogen and LED, contain a granular material at the base. There seems to be considerable variation in how much of this powder is present, even within the ...
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4answers
123 views

How can I control 2 lights with a SPDT switch?

Note: After some careful thought, I've opted to rather just abandon this question, see the chosen answer for more info. I current have a 220V AC lamp with two light bulbs wired with a single on-off ...
2
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2answers
175 views

Why would an incandescent bulb produce a bright flash when burning out?

A typical way of an incandescent bulb to burn out is with a bright blueish flash and often an audible sound and (very rarely) an explosion of the bulb glass. Wikipedia says the following: Since a ...
0
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1answer
25 views

What safety regulations do I need to follow for wiring of a decorative lamp utilizing a fluorescent tube with g10q fitting?

I'm building a cast concrete decorative lamp. It will use an exposed circular fluorescent bulb, which attaches to a g10q lampholder. I understand I will need to wire it up to a ballast and starter, ...
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3answers
89 views

What is this small circuit board used for in a 12v light?

Repairing a home-made disco light that was used in a nightclub during the 80's/90's and it consisted of 16 12v 50w lamps arranged on 8 legs. I have discovered a small circuit board within each lamp ...
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0answers
30 views

Travel Photography 3.5V 3,6-4,8A LED Lamp powered by power bank

I travel a lot for my work as a photographer. For this I'm building a custom full spectrum lamp. I have no issue running my build with a normal adjustable power supply from my studio. To be able to ...
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3answers
67 views

Identifying the pins of an AC lamp

I have an AC indicator lamp which I have to add to a design and and here is the only information. As you see the two terminals are tied on one side and the other two pins has no continuity with any ...
0
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1answer
34 views

Use both manual switch and WiFi Smarth switches together

I have Sonoff Basic WiFi Smart Switch that I would like to connect to my lamp and control it via phone. However if something will go wrong, or there would not be ...
4
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6answers
2k views

Why plug is polarized in the US? What are the benefits?

I could not get a good hold of it, I searched online quite a bit. This must have to do with safety but then non-polarized switches are used through out the world with no issues are risks, so my ...
0
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0answers
21 views

3 switches, one lamp with existing wiring [duplicate]

I have an existing wiring with two switches for 1 lamp. How to add third independent switch without changing to much wiring inside walls (usual wiring [with the triple switch in the middle of ...
0
votes
1answer
68 views

10 Lamps setup 220v ac, would it be safe?

I am not an electrical engineering or anything, I am just a curious person trying things at my home for fun. I want to setup a lamp system for my sister's mirror where I would need to use 10 lamps ...
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1answer
37 views

HID Lamp Ballast Using TI UCC2305

I am trying to control an OSRAM XENARC 66140 35W HID (High-intensity discharge) Lamp with a circuit which contains Texas Instruments UCC2305. I have obtained 4 original lamps from OSRAM and tried on ...
2
votes
1answer
339 views

Driving compact UV lamp with DC

I'm 'testing the water' if you will on driving a Panasonic TUV PL-S 5W UV lamp with a low-voltage (12 ~ 24 V) DC supply. The lamp is rated at 34 V, 0.18 A. Since I have a DC source, magnetic ...
1
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0answers
103 views

Theory of Operation for Arc Lamp

I am attempting to power an arc lamp (which I have) using a programmable power supply (which I have yet to source.) Though the lamp is rated at 1000w (37v at 27A) I would like to power it at about ...
0
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2answers
57 views

How do series connected lamp dimmers/electronic switches work?

How does a series connected electronic LED lamp switch operate when it has switched the lamp off and there is no voltage reference. And how does it work when the lamp is switched on and the voltage ...
-2
votes
1answer
112 views

Still 1000 hours of lifetime [closed]

I am familiar with the famous Phoebus cartel of the companies Osram, Philips and GE, but this cartel began its operation in 1924 and lasted at most to the World War II. In the second half of the 20th ...
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2answers
79 views

Replace lamp in old amplifier

I am trying to replace a fried lamp in my very old amplifier (a Dual CV 1280 Integrated). As I essentially only use the mode that is indicated by the fried lamp, I thought I could just switch it with ...
1
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2answers
142 views

Making a 100 LED Lamp

So I'm still very new to electronics but I would like to make a 100 LED Lamp for fun. I got my hands on a few 18650 batteries yesterday so I decided to do this project. I thought it through but I am ...
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2answers
51 views

Current calculation

I have a question of confusion in my mind, so I thought to share it with you all. when we connect a halogen lamp of 12 VAC 50 watt to 220 VAC with the help of transformer, why the current consumption ...
0
votes
1answer
84 views

How to excite a fluorescent lamp without connecting it?

I'm a newbie in electrical engineering, so this might be a silly question. But are there any standard ways to create an electric field over a volume of air, strong enough to excite a compact ...
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2answers
53 views

Possible to have a lamp controlled by both a simple switch AND a relay

There's a lamp in my son's room that we use for reading and the bedtime process. I'd also like to link it to a relay connected to a Particle Photon that we could signal him down for dinner with. But I'...
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1answer
112 views

Schematics: If I turn off light in room 1 the light in room 2 turns on and vice versa?

I need something like this: If I turn off light in room 1 the light in room 2 will turn on and vice versa (if I turn off light in room 2 the light in room 1 will turn on). Also I don't know how can I ...
0
votes
1answer
1k views

How to test the output current of a LED driver without a LED lamp?

I have very basic knowledge of electronics but I have to design a circuit to control this LED driver (Constant Voltage + Constant Current LED Driver). I already have a prototype and I need to test it,...
1
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1answer
60 views

Low-power halogen lamp dimmer

I want to connect a set of low power halogen lamps to a dimmer. This would be used to illuminate plants who are then monitored using a hyperspectral camera. I was wondering whether any spurious ...
1
vote
1answer
121 views

Question about a point made in Art of Electronics

In the Art of Electronics (Second edition), Section 2.02 (Transistor Switch), the book gives a circuit diagram with a bulb rated 10V, 0.1 A, connected to the collector of a NPN transistor. The other ...
0
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1answer
404 views

Help me understand and fix this dimmer circuit

I have a table lamp which has a busted dimmer control. When I bought it the dimmer used to kinda work but then after a few days it worked only when the rotary knob was turned all the way high. After a ...
0
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2answers
1k views

Two or more Diac Triac dimmers in parallel

I wanted to know whether connecting two or more simple diac-triac ac lamp dimmers in parallel with the same load cause any problems? I do not want to connect them in series, just parallel will be ...
1
vote
1answer
2k views

How to test a pond filter UV lamp and ballast?

I bought a new UV lamp for a pond filter but I don't see any light from the inspection lens in the lamp holder. I checked the the connection in the socket and I see 240v. Does that mean the ballast ...
0
votes
1answer
242 views

Modify 120v lamp dimmer for LED bulb

I have a "stick lamp" that has a pot/twistable dimmer with photocell. It works fine with a 24w Sylvania CFL bulb but won't light this 22w dimmable LED bulb (http://www.ikea.com/us/en/catalog/products/...
2
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2answers
366 views

high voltage igniter for carbon arc lamp

I know how a carbon arc lamp works, but knowing that an arc lamp of inert gas, ignited by a discharge of high voltage that ionizes the gas inside, I wonder if it would be possible to cause the ...
0
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1answer
229 views

Attempting to make a NES Zapper Lamp and need wiring help

So I have a Nintendo Zapper gun that broke and I want to turn it into a Desk lamp. But I want to use the Trigger as the On/Off switch. Can somebody please help me and point me in the right direction ...
0
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4answers
1k views

How do I connect light bulbs to an alternator on a bike?

Some friends and I are working on a school project and need a bit of help. The basic premise is that we’re using a bicycle (which is kept stationary) to spin an alternator and power some lightbulbs. ...
0
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1answer
460 views

Why are car head or tail lamps blinking/flickering in slowmotion (slomo)

I have seen this many times that the daytime running LED headlamps or taillamps of cars blink in slow motion videos, why is that?
-2
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2answers
17k views

What is the chance a light left on will start a fire? [closed]

What is the chance that a normal household lamp with a lightbulb (LED in this case) left constantly on will cause a fire? I realise that in the case of correct installation and use this should not ...
1
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3answers
1k views

filament led bulb inrush current

I'm tring to choose a relay for my circuit which has a Filament LED bulb as load. The bulb is 230VAC / 60W 6W. The nominal current should be about 0.03A which is not an issue for a regular relay. The ...
0
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1answer
118 views

Help with building a row of vintage lights

I want to build something like this: I plan on connecting each bulb in a parallel connection as per below diagram. Any reason why you would make a serial connection? I'm not planning on using ...
2
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2answers
6k views

Why is a common LED failure mode to flicker astably or oscillate? [closed]

There are many cases of LED lights failing by beginning to flicker intermittently. I am not talking about the intentional duty-cycle modulation utilized in many driver circuits. I am referring to ...
0
votes
1answer
171 views

Current decrease in a lamp due to the change in scale of an analog ammeter

I do not understand what happens in the following situation regarding internal resistance of an analog ammeter. The internal resistance of analog ammeter changes if the scale is changed. For example ...
0
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2answers
313 views

Is debounce necessary when detecting voltage on a relay switched lamp?

I'll be using an Arduino to "read" the parking light wire on a car. I was wondering if debounce is necessary here? I want to think that the factory bulb will act as a debounce to smoothen out the ...
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2answers
278 views

Arduino Control 12V Lamp with Car Battery

I'm working on a small project to control a lamp with car battery and I found this circuit on Internet. Now my car batter delivers 5 amperes and I would adapt this circuit to my needs. Is it possible? ...
1
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2answers
1k views

iPhone screen pin layout

I have an old iPhone of which I want to reuse the LCD display. The thing is, I don't want to use it as an actual display but rather make a fancy lamp out of it. The question I have is how I can figure ...
1
vote
1answer
112 views

Will this work and what transistor do I use?

I posted this question in the Meta Stack Exchange but David Tweed said that the idea was flawed so any alternative circuit suggestion would be appreciated. I have this Ikea lamp. It runs off 5V usb ...
0
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2answers
560 views

Smooth and no-flickering dimmable light source

My goal is to record a video with a varying intensity light source. No flickering at any frame rate (frame rate 30 60 120 240) while watching frame by frame, not human eye. Smooth dim level Any type ...
1
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3answers
21k views

Ceiling LED light emits very dim light when switch is off! [closed]

I have overhead ceiling LED light fixtures. When I turn on Main Switch of the house, I see the LED starts emitting very dim light ( have to look for a 3-4 second to perceive) even when LED's switch ...
-1
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1answer
136 views

Can a lamp cause a fire if exposed to steam? [closed]

I have this lamp (IP20) in my bathroom, and was wondering what the hazards are. http://www.nordlux.com/en-US/FIND_YOUR_PRODUCT/Produktvisning/Chamber_-_fitting_8w-27226101.aspx Will it just stop ...
0
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1answer
94 views

Wall mount Rotary Dimmer installed on lamp cord?

Could I do something like the diagram below, or is this a technically bad idea? I like the feel of this rotary dimmer and was wondering if it was safe to install it on the cord between the outlet and ...