Our display is relatively primitive - off the shelf (mostly BigW) strings run around garden beds, roof etc - I keep coming up with problem of having too many 240 to 30v transformers to run off a single power board (240v type). I have seen power boards piggybacking power boards but don't want to go there. Has anyone used a single low voltage power supply to power maybe 10-12 strings of say 600 leds. Also could that same power supply be used to increase the total number of leds in a string (bigw generally 600 leds) perhaps up to 2400. Any advice appreciated.
Rationalising power supply
- Thread starter frankt
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Habbosrus
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franky_888
Full time elf
I think frankturnbull is hacking his MFC's only, so would be looking to maximise the number of strings that could be run off 1 x 240V out-of-the-box power supply.
Is this corect frankturnbull?
Is this corect frankturnbull?
- Thread starter
- #4
Currently i have 10 or so strings each with their own bigw power supply requiring 10 * 240v outlets to plug into. Would like to have 1 or 2 power supplies and distribute power at low voltage. I would have thought (although i am very new to this) that i might be able to retain bigw type controllers. Not necessarily looking for string function being coordinated
Habbosrus
Back again
Hey Frank, There's still time before Xmas to get a controller and a power supply. You could do some basic sequences. Go on. You know you want to 
Whereabouts in NSW are you?
Whereabouts in NSW are you?
Habbosrus
Back again
You're not that far away from me so if you find yourself down this way give me a yell. I'll show you through my little setup and help you along if I can.
Have you been into Chat? There's normally a bunch of talented people in there ready and willing to pass on some knowledge. Be warned though, you will probably come away with CLAP - and it's great
Have you been into Chat? There's normally a bunch of talented people in there ready and willing to pass on some knowledge. Be warned though, you will probably come away with CLAP - and it's great
BilboBoggles
New elf
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- Dec 27, 2012
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- 4
I bought a 30v dc 4a switch mode supply on ebay. Thats enought for about 30 sets.
http://www.aliexpress.com/store/701799/search?SearchText=waterproof%20power&PPValue=196-411,439-3956
is possibly similar to what he has bought. I'd trust the waterproofing of an aliexpress purchased power supply slightly more than ANYTHING purchased on ebay.
As for running 30 sets that's pushing the friendship. A set of fairy lights (depending on length) is usually about 5W. 30V 4A is 120W so that works out to 24 sets to run the power supply at 100% capacity. The actual wattage of the strings will affect the number and whether the voltage selected for the power supply runs them at the same brightness. As soon as you change the brightness up or down the power usage will vary dramatically.
is possibly similar to what he has bought. I'd trust the waterproofing of an aliexpress purchased power supply slightly more than ANYTHING purchased on ebay.
As for running 30 sets that's pushing the friendship. A set of fairy lights (depending on length) is usually about 5W. 30V 4A is 120W so that works out to 24 sets to run the power supply at 100% capacity. The actual wattage of the strings will affect the number and whether the voltage selected for the power supply runs them at the same brightness. As soon as you change the brightness up or down the power usage will vary dramatically.