Questions tagged [lamp]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
4 views

Lava lamp UK to CANADA [migrated]

I've recently buy a lava lamp and it only works for EU, all of it is 220-240V. First I've buy the plug adapter (not converter for V) the light bulb is 240V R39 E14 30W, and it doesn't exist in 120V, ...
user avatar
11 votes
5 answers
837 views

What explains this bulb/motor behavior?

My son was building circuits with a hobby kit. He tried connecting a small DC motor and incandescent bulb in series with two batteries. The motor is not marked, probably is rated at no more than 6V. ...
user avatar
1 vote
0 answers
59 views

Exchange a battery with capacitor?

I have this 5 V lamp work with a internal-battery. I took the battery out and it work with the 5 V charge directly. But it flash/flick sometime. My idea is to put a capacitor in place of the battery ...
user avatar
-7 votes
1 answer
90 views

I have to build an LED lamp with a lithium battery [closed]

I don't understand much about electronics, I just know that the battery is very dangerous. These are the links of the components that I will use: BATTERY 3.7V 4400mAh LED 11,9V 1050mA STEP UP BOOST ...
user avatar
8 votes
3 answers
829 views

Why did a spark occur between my HDMI cable and metal lamp base?

Edit: Update 1/2/22 @ 2:27 UTC: outlet tester shows that all outlets and power strip outlets being used were normal. Update 1/2/22 @ 21:07 UTC: performed various continuity tests which suggest to me ...
user avatar
  • 89
3 votes
5 answers
165 views

Using a single LED from a 220V LED light bulb to repair my 1.5V LED flashlight?

My flashlight's LED is broken, the tip of the LEDs housing is exposed and it does not light up. As the title says, will it be feasible using a single LED from a 220V LED light bulb to repair my 1.5V ...
user avatar
1 vote
1 answer
60 views

Special project elevator floor lamp

I am building a floor lamp made of vintage elevator directional lenses removed from an old hospital. The lenses are from the 50's. I want to simulate an elevator theme for this project. I have all ...
user avatar
0 votes
1 answer
70 views

Reducing the brightness of an incandescent bulb

I have an old piece of hifi equipment that has some indicator lamps on the LCD. The circuit that drives them is 28V AC. I have two 14V 115mA bulbs in series connected to this circuit. Is there any way ...
user avatar
0 votes
1 answer
77 views

UV-C lamps flickering problem

I have got 8 UV-C lamps connected to a portable battery(AC) through a smartplug. I am using 4 UV Ballast with 2 lamps connected to one ballast. I am controlling the lamps with help of a wireless ...
user avatar
-1 votes
1 answer
87 views

Switch lamp problem [closed]

I have the answer to the following problem, but I am not sure how they got it. Please explain: Four identical incandescent light bulbs L1, L2, L3, L4, and a battery are connected as shown on the ...
user avatar
  • 5
1 vote
1 answer
55 views

Touch switch for hanging lamp (touching metal bar): Ideas?

A few years ago, we have bought an IKEA Glimt hanging lamp that operates with halogen lamps. It has a "touch dim" functionality, so when a person touches the metal bar of the lamp, it dims (...
user avatar
1 vote
2 answers
45 views

Does different bulbs in one circuit lead to shorter lifespan? [closed]

I had a conversation with my family regarding lifespans of bulbs. They claimed that they had observed that when different wattage bulbs are plugged in the same hanging light, the bulbs would die ...
user avatar
0 votes
0 answers
93 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 ...
user avatar
  • 1
0 votes
3 answers
161 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 ...
user avatar
  • 306
0 votes
1 answer
28 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 ...
user avatar
  • 942
0 votes
3 answers
22k 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,...
user avatar
  • 101
0 votes
2 answers
122 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 ...
user avatar
0 votes
3 answers
206 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 ...
user avatar
1 vote
2 answers
119 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 of ...
user avatar
9 votes
3 answers
3k 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 ...
user avatar
  • 525
1 vote
2 answers
139 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 ...
user avatar
  • 115
0 votes
2 answers
62 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 ...
user avatar
  • 11
-1 votes
1 answer
139 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 ...
user avatar
  • 3
2 votes
3 answers
366 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 ...
user avatar
  • 121
0 votes
1 answer
87 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 ...
user avatar
  • 3
1 vote
5 answers
192 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 ...
user avatar
0 votes
1 answer
391 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). ...
user avatar
0 votes
1 answer
67 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 ...
user avatar
0 votes
2 answers
79 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 ...
user avatar
2 votes
0 answers
71 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 ...
user avatar
  • 121
-1 votes
4 answers
767 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 ...
user avatar
2 votes
2 answers
1k 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 ...
user avatar
  • 12.1k
0 votes
1 answer
31 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, ...
user avatar
0 votes
3 answers
284 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 ...
user avatar
0 votes
0 answers
35 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 ...
user avatar
0 votes
3 answers
72 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 ...
user avatar
  • 1,319
0 votes
1 answer
114 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 ...
user avatar
4 votes
6 answers
6k 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 ...
user avatar
  • 601
0 votes
0 answers
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 ...
user avatar
  • 101
0 votes
1 answer
72 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 ...
user avatar
  • 3
0 votes
1 answer
51 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 ...
user avatar
  • 353
2 votes
1 answer
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 ...
user avatar
  • 2,409
1 vote
0 answers
132 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 ...
user avatar
0 votes
2 answers
59 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 ...
user avatar
-2 votes
1 answer
118 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 ...
user avatar
  • 21
0 votes
2 answers
127 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 ...
user avatar
1 vote
2 answers
250 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 ...
user avatar
  • 21
0 votes
2 answers
56 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 ...
user avatar
  • 1
0 votes
1 answer
113 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 ...
user avatar
0 votes
2 answers
68 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'...
user avatar
  • 1