power supply thought

[lboucher]

with prices like this... Could power for each string be built in at the hub level?

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[tbone321]

Those are not power supplies, they are buck converters and only put out 3A.  If you were to implement 16 of them (one per output) then the cost would be $160 which is way more than most of the PC power supplies that we use and take up a whole lot more space.

[RJ]

Also the max input is 35volts so you still need a power supply to get from 120 to less than 35.

I am still working on a solution for that issue.

RJ

[lboucher]

Cool to here your looking into that issue.

@tbone321
Check the listing again, its 10 bucks for quantity 10...
So 16 of these is about 17 bucks.

[tbone321]

My mistake but it also says that only 10 lots are avaliable so when they run out, who knows how much more they would cost, especially if there is a sudden demand for them.  The other issue with them as RJ mentioned, they need 35V or less so a power supply of some type will still be needed on top of these.  I have yet to find a DC power supply that can give more bang for the buck than a PC power supply.  Even AC landcape transformers cost more and give much less. 

[davrus]

Isn't the point with these that you lessen voltage drop, and can reach longer distances when you have a higher current ?
So, you use a central 24 V power supply, and have these little units at the end of the power cable to reduce whats left of the voltage to give pure 5 V  ( or 12 V).
Ray Wu has them at 10 for $16.

[lboucher]

There are plenty of issues, and few workable solutions.
The path in between is full of interesting, well what if moments.
and 99% of the rest is alot of hard work by skilled people.

Meanwhile, I'm probably going to use some of these in a solar backup battery bank project.
I can think of lots of reasons to keep 10 lying around... Especially at $1.xx a piece...