- Thread starter beepstar
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- auto domestic electric electrical
Or a 12V lighting transformer (or two transformers) as you'd use for 12V downlights.
Have a look for a 10A CB (radio) power supply? bound to be a few used cheap ones on Fleabay.
But ensure that it is the continuous rating. Some units are rated at only 50% duty cycle as you never transmit continuously and receiving takes much less power. I'd fit LEDs or use lighting transformers.
This used to be sort-of possible in the days that domestic chargers used to be a transformer and rectifier with enough resistance to limit the current. My first battery charger gave IIRC 17V off-load dropping to 11V at 5A, and would power a headlamp OK. But modern ones very often won't give any output until they see a battery of at least a few volts connected, and then start a program of varying current and voltage limits to charge the battery as fast as possible without damage. My favourite brand of 12V charger goes up to 16V briefly at the end of the equalise stage, so not good for halogen lamps!
This used to be sort-of possible in the days that domestic chargers used to be a transformer and rectifier with enough resistance to limit the current. My first battery charger gave IIRC 17V off-load dropping to 11V at 5A, and would power a headlamp OK. But modern ones very often won't give any output until they see a battery of at least a few volts connected, and then start a program of varying current and voltage limits to charge the battery as fast as possible without damage. My favourite brand of 12V charger goes up to 16V briefly at the end of the equalise stage, so not good for halogen lamps!
Daz
Why? LED versions of automotive halogen bulbs are commonly available. Direct replacements. Lol etc !!!
D
davesparks
But they don't look right! If this is to be an artistic piece then he'll want the warm glow of a tungsten source rather than the harsh white of an led source.
Which then begs the question of whether he want full brightness or dimmed?
I may have misunderstood the OP but I've read it as being an artistic feature for the wall of a commercial garage.
Which then begs the question of whether he want full brightness or dimmed?
I may have misunderstood the OP but I've read it as being an artistic feature for the wall of a commercial garage.
Not many motorbikes have had sealed beam units for a long time now. Are you just trying to be awkward here? lol !!!!! lol
T
tazz
As already mentioned, modern multi stage chargers are not a good idea here, another is lighting transformers, or as should be referred to, transformless psu`s. Problem here again, especially with cheap crap, is the pcb.....very hard, to design the tracks thick enough to handle 10A +.....Try looking for a good old wirewound transformer in surplus or fleebay, will outlast any modern lighting driver
T
tazz
Just checked with a company who supply our 24v switchmode din units, and they have an offer on 12v 10A din units at £25 worth a look.
RP1120D-12CEN 12Vdc 10A Output Din Rail Power Supply ú47.00
RP1120D-12CEN 12Vdc 10A Output Din Rail Power Supply ú47.00
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