Questions tagged [halogen]
The halogen tag has no usage guidance.
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Can I use 3.7V battery on a 3.5v rated halogen lamp?
I have a retinoscope that is 3.5v rated and I am searching for battery replacement, the batter I am getting is a 3.7v li-on and the battery which is used in the retinoscope is 3.5v ni-cd, can I use ...
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Dimmer for 2 halogen headlights [closed]
I have two halogen automobile headlights (12v, 65 watt) that I’m using to make a wall hanging. I want to be able to dim the lights with a dimmer that I can have on a side table. I have a transformer ...
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Why am I seeing weird behavior with LED bulbs in old light fixtures? [closed]
I have two light fixtures on my front porch. I believe they're from the late 60s, when the house was built.
I believe they're wired in series since removing one bulb causes the other to stop working. ...
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5 mm 12 V 5 W filament lamp
Please help to identify small filament lamp, size about 5 mm. Voltage specified as 12 V. It was mounted on the IR source.
There is a little vertical metal spring (not filament, another one) inside ...
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How to dim a 12V AC halogen
I have a couple of lamps, halogen I think. I bought them decades ago. When new they had a nice dimmer knob that led down to a transformer and I could dim the lights or, more usually, turn them off and ...
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What is voltage limit for 12V car bulb? [closed]
Cars do not have constant 12V voltage. So car bulbs should also be operable at those unstable voltages. My question - what are the limits for basic H7 halogen (or LED) bulbs used in cars? Could they ...
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Mini reflow oven advice
Hey all I am venturing into making a DIY reflow oven. Been looking at many different types/styles over the last couple of years and feel now is a good time to start one.
I originally planned on ...
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Why does this LED bulb have an energy efficiency rating of 'F'?
In my home, I have some halogen spot lights, which have an energy efficiency rating of 'C':
I would like to replace them with more efficient LED bulbs, but looking on the Philips website, they claim ...
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Switching buck/step down converters with resistive lamps
I need to power a halogen lamp with a constant power (5 V 900 mA) using a constant current switching driver IC. I will not use an LDO IC, since my power supply is 24 V and it will generate too much ...
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Constant current source (aka "LED driver"): Behaviour with halogen light bulb
I wanted to ask a quick question. When running (power) LEDs, they mostly require an adequate constant current source / LED-driver IC. Most of the time you connect multiple LEDs in series, so that the ...
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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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Powering 12V 35W halogen bulbs with a constant current supply
I'm revisiting an old project, and I want to see if there is anything I could have done differently, or if I missed any important details or considerations.
Basically, I used a constant current driver ...
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What would happen with a 25W bulb (g4) in a 20W socket?
I have a 20W (12V) desk lamp and a 25W (500 lm) bulb, type = G4/halogen.
I know putting a 75W bulb in a 60W socket can damage it or cause it to break.
In my situation there is only 5W difference.
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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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Why do high current wires have fabric/nyon sheathes?
I saw two wires going into a halogen light bulb whose outer sheathes were not a plastic (like PVC, or polyurethane), but rather a woven fabric (like a nylon shoelace). Why is woven fabric better for ...
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