undefined | Better HN

0 pointsxpe2y ago0 comments

The usual counterargument is: voltage drop can become a problem. Trying to use one big power supply and use DC as your only distribution mechanism probably isn't a good idea.

But choosing a DC system for part of the house can make a lot of sense.

For one residential new construction room, it can be practical to have one shared power supply rather than one per LED. Say you have a 12 V, 5 A DC power supply. Using a star wiring topology, this can serve 10 lights (at 500 mA) fine with 16 AWG.

0 comments

djbusby2y ago

But how far can the power go before wire resistance causes too much Vdrop? Maybe one good transformer+rectifier per room? AC to the room and DC in the room. Those DC runs would be <5m each.

j / k navigate · click thread line to collapse

0 pointsxpe2y ago0 comments

The usual counterargument is: voltage drop can become a problem. Trying to use one big power supply and use DC as your only distribution mechanism probably isn't a good idea.

But choosing a DC system for part of the house can make a lot of sense.

0 comments

djbusby2y ago

But how far can the power go before wire resistance causes too much Vdrop? Maybe one good transformer+rectifier per room? AC to the room and DC in the room. Those DC runs would be <5m each.

j / k navigate · click thread line to collapse