Gallery, Projects and General > The Design Shop
12 volt LED lighting throughout house
BillTodd:
With led and lp flourescent it is very important to ensure the lamp is kept cool. Tungsten lamps will run fine even when extremely hot so many light fittings provide little or no cooling air flow.
The electronics in led and lpf (including the leds themselves) lamps will fail very quickly above about 70C. Even though they arevery efficient they can over heat in an enclosed fitting.
Bill
AdeV:
Halogen bulbs are also filament bulbs IIRC. They won't make much difference to your electricity consumption, that I am aware of. Over here in Blighty, 100 watt filament bulbs are no longer available, I think 60 watt bulbs are, and 40w definitely are.
Over here, the "preferred" replacements are CFLs (compact flourescent) - ghastly things. As someone once said, when you first turn them on you get all the light of a candle shining through a bowl of piss (nice turn of phrase)... I hate the things. They don't come close to their claimed 10 year lifespan either, but if you look closely, that turns out to be if you're using them for about 30-60 minutes per day. Some duty cycle...
LED bulbs I think are the future. I changed out my 6 50watt downlighters in the kitchen, for 6 6watt LED replacements. It's hard to tell if I get more light than I should have had before (as 3 of the halogens were out), but I certainly have plenty of light now with all 6 running. And the total load is just 36watts - less than running just 1 halogen... I put them in about 6 months ago, and so far they're all doing great guns.
FWIW, I think LED lights are the future. CFLs will fall by the wayside, as will incandescents; the only bork factor is the cost, and once we're buying these things by the million, the price will come way down.
Dawai:
Found a roll of 4c 28ga phone cord. Not perfect.. but do-able.
I've been tidying up around the shop for house-shop insurance photos, moved several tons of old hot rod parts by myself by hand.. won't be climbing through the attic today I think. I can remember being beat up and not hurting as bad. we all remember how tough we used to be thou.
Unit running off the opto22 module ran all night again, I simply found the positive direction going through the transistor module, then wired a switch leg up to the LED light, cut the positive, put one switch leg one side, other on other side.
Funny.. it is a sinking negative signal, there is positive all the time on the module from a wall-transformer dc supply.. The arduino does not produce enough power to flip the module without putting the 5vdc onto the terminals.
Because it is negative sinking logic, the 0-255 is reversed, it is seeing the other side of the waveform..lower side... lower the pwm frequency to (0) and the light gets brighter, raise the pwm to 255 (max) and it gets a dim, almost gone state. Since I am useless for anything else today, I'll put the fluke 77 meter inline and see what the frequency to current changes are.
Dawai:
THE wind is howling here.
Adding another operation for this unit, (been in operation now three days)
Alternator wind charging? Everyone seems to be swapping out the exciter coils for permenant magnets? WHY that locks the unit up unless the wind blows strongly.
More intelligent would be to leave the alternator alone, let it come up to speed in light wind, then apply exciter coil voltage, slowing, stealing the inertia off the prop, charging the battery. So, along with the voltage monitor it is just a few more lines of logic. THE wind turbine-generator will be another post.
I just purchased another 20 smd arrays lights.
BaronJ:
--- Quote from: AdeV on January 05, 2014, 07:14:23 AM ---
LED bulbs I think are the future. I changed out my 6 50watt downlighters in the kitchen, for 6 6watt LED replacements. It's hard to tell if I get more light than I should have had before (as 3 of the halogens were out), but I certainly have plenty of light now with all 6 running. And the total load is just 36watts - less than running just 1 halogen... I put them in about 6 months ago, and so far they're all doing great guns.
FWIW, I think LED lights are the future. CFLs will fall by the wayside, as will incandescents; the only bork factor is the cost, and once we're buying these things by the million, the price will come way down.
--- End quote ---
I agree with you 100%. I've just been out and bought 6 cool white GU10 replacement LED bulbs for our kitchen. These are to be used to replace a 6ft 80w florescent. The holders and fittings were bought in France last year for the princely sum of 6Euro. I've already replaced the three in the bathroom and I just need one GU11 to go into the shower light fitting. It seems that 12 volt ones are quite scarce.
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