Questions tagged [lamp]

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32 views

how to drive 7r lamp

I was looking at some moving beam lights recently and saw that you can buy replacement 7r (230w) lamps for less than $20, and had the idea of attempting to build my own moving head or at least a non-...
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0answers
46 views

Issue converting halogen desk lamp to LED

I have a halogen desk lamp with a three position rocker switch with a central off position and either side representing a different dimming setting. It has a transformer with two coils connected to ...
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3answers
79 views

How to connect live and neutral and earth connection in AC devices plugged into socket?

I know that when I have a fixed lamp in my house I have to use a single switch on the live wire. But when the device is connected using a plug the live wire and the neutral wire vary depending on how ...
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1answer
26 views

How to simulate two 12W lightbulb in series to 220VAC?

How can I simulate two lightbulb of 12Watts in SPICE? In proteus simulation, there is only a lamp of adjustable nominal voltage and resistance. The default is 12V nominal and 24ohms resistance. If I ...
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0answers
75 views

Turn LED OFF when load is disconnected

Link for the System This is my existing system, I would like to Add a LED indicator which will turn off when the Lamp get burned/damage. Someone told me to use transistor but am not sure which ...
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3answers
10k views

Max watt bulb for an old “660w 250v” table lamp? [closed]

I have an old table lamp that's imprinted "LEVITON / MADE IN USA / 660W 250V / LAMP HOLDER". I'm used to lamps with stickers that specifically tell me what max-watt bulbs I can use, usually 60W, 75W,...
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2answers
61 views

Power consumption in watt for fluorescent lamps

I live in Egypt where the AC voltage is 220v. Yesterday i bought two fluorescent lamps (60cm and 120cm). I toke the following photos for the what is written on those lamps: Please have a look to the ...
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3answers
195 views

Covid-19: can a UV-C source be improvised from a standard mercury vapor lamp?

I suggest it because the usual professional UV-C sources are in short supply and very costly. A common 175 W mercury lamp designed for illumination includes the quartz 'lamp' tube itself, inside an ...
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1answer
77 views

How to check led current

I'd like to check if a lamp shines and if it's dead, a relay is supposed to switch. I thought about using an attiny with a hall sensor. There are some sites that complain about the inconcurrency ...
9
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3answers
2k views

Neon lamp symbol

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 ...
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2answers
59 views

How to convert tail light to LED?

I want to convert my tail light(Peugeot 405) to LED light.there are 5 lamp in this case. Instead of each lamp I think 6 white LEDs are enough. as you know better than me, each white LED is 3.3v and ...
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2answers
58 views

Wiring 1 lamp and 1 fan to 2 switches instead of 1

There's this setup, where I have one lamp and one fan, both are connected to one switch. I would like to add another switch to control them independently. Here's a rough schematic of what I found ...
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1answer
82 views

Zener diode identification

I need to replace the zener diode. Will the model marked in the table in the picture be correct? The marking method indicates that the diode manufacturer is: "DIODES INCORPORATED". I do not ...
2
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3answers
219 views

Does lifetime of tungsten incandescent lamp shorten by every turning on, directly connecting to electric grid, and how much?

Does lifetime of tungsten incandescent lamp shorten by every turning on, directly connecting to electric grid, ie not using special device to turn it on smoothly, and how much? It was said to us in ...
0
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1answer
70 views

I lost a device's power adapter, what should i seek for a new power adapter? [duplicate]

i bought an expensive desk lamp from the US called Lumiy Lightsblade 1500s, i lost the power adapter, so my questions are as you are electrical engineers: 1) can i use it in israel (The standard ...
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5answers
113 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
185 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
63 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
52 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 ...
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0answers
67 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 same ...
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4answers
355 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
807 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
29 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
187 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
34 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
71 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 ...
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1answer
47 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 ...
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6answers
4k 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 ...
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0answers
22 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
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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 ...
0
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1answer
43 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
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1answer
1k 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 ...
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0answers
127 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 ...
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2answers
58 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 ...
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1answer
114 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
110 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 ...
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2answers
209 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
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1answer
100 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
56 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
144 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
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1answer
2k 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
67 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
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1answer
130 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 ...
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1answer
587 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 ...
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2answers
2k 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 ...
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1answer
3k 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
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1answer
325 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/...
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2answers
446 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
267 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 ...