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My all-time favourite Dilbert cartoon, this is: BTW, a Dumpster is a brand of skip, I think. -
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<Wilmslow mode>
I've just measured the resistance of these 5W halogen bulbs... cold, it's about 2.5 ohms...
So 12V / 2.5 ohms = 4.8A.
25 x 4.8A = 120A...
Oooooops...
</Wilmslow mode>
That's going to need one hefty PSU...Comment
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Originally posted by zeitghost View Post<Wilmslow mode>
I've just measured the resistance of these 5W halogen bulbs... cold, it's about 2.5 ohms...
So 12V / 2.5 ohms = 4.8A.
25 x 4.8A = 120A...
Oooooops...
</Wilmslow mode>
That's going to need one hefty PSU...
Even at 12 volts thats a big PSU. At 240V it's just plain scary"Being nice costs nothing and sometimes gets you extra bacon" - Pondlife.Comment
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Originally posted by DaveB View PostWhat voltage are they?
Even at 12 volts thats a big PSU. At 240V it's just plain scary
It's the surge from cold that's the scary thing.
I've got 25 12V torchbulbs running off a meaty 2A psu & it sweats a bit when they all switch on together...
The original design used leds and ran happily off a 1A supply... but an ordering mistake with the LEDs scuppered that idea.
Ho hum.
It ain't my moneyComment
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Originally posted by zeitghost View Post12V.
It's the surge from cold that's the scary thing.
I've got 25 12V torchbulbs running off a meaty 2A psu & it sweats a bit when they all switch on together...
The original design used leds and ran happily off a 1A supply... but an ordering mistake with the LEDs scuppered that idea.
Ho hum.
It ain't my money
Maybe you could code in a swanky startup sequence to make it look good and keep the inial load down."Being nice costs nothing and sometimes gets you extra bacon" - Pondlife.Comment
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Comment
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Originally posted by DaveB View PostCould be your workshop that goes up in smoke though
Maybe you could code in a swinky startup sequence to make it look good and keep the inial load down.
Now to source a 20A PSU... the 10A one was £40... I don't think my illustrious client realises quite what he's got himself into...Comment
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The '00 still not gone?My all-time favourite Dilbert cartoon, this is: BTW, a Dumpster is a brand of skip, I think.Comment
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