On a 24 Volt system 7 lights in series gives you 24 Volts but that is with no current limiting. That is a crude system prone to certain failure. It would work. My flashlight is just batteries and LEDs with no resistors but it works even if I do have to replace LEDs once a year or so.I'm making a pwm circuit for leds at 450watts max, i have a few questions and I'm very open for suggestion
in my house i plan to make all my own power for the lights we use, I'm trying to get off the grid but i want to step into this. currently 100% if my heat and hot water are from wood that i cut off my own wood lot,
so a little about the system in planning, the house has a total of 14 rooms, and i wish to run 25watts per room, with 3 rooms getting 50 watts
i bought 450, 1w led's http://www.ebay.ca/itm/50pcs-Brand-...hash=item2c85751197:m:mA9ClcekVcDeTh--R1Ag-ww
I'm a machinist by trade, so I'm going to make aluminum fixtures to mount the leds on to hold them and to control heat also they will be slightly dishes
so the leds are directed in different directions
using 16/2 cl2 stranded wire with a 24 volt system, no more then 25w per line, longest run (1 direction) is 30 feet,
Ill be alright on the wiring of the modules and the switches and my fathers been an electrician for 40 years now so I've been around all that stuff, but I'm new to this type of electronics
i want to build a PWM controller and i wish to be able to pwm the whole system
so I'm thinking
battery bank at 24v
24v into into pwm controller
24v pwm fed into a fuse box as the "mains"
from the fuse box send out 14 lines to each room with switches and led modules in the rooms
plan to do some testing with the leds and figure how many per fixture
most times i hope to have only the lights on we need so I'm thinking probably not more then 150 watts(high end of things) at any given time but i do have 450 leds so its possible it can be that much power
I have made up three drawings mostly compiled of things on found on line, still missing a few parts, you will notice the "T" parts missing and a few resistor values missing, as I'm still undecided on them or have figured them out yet
and input on those parts would be nice, but with poking around and reading data sheets ill be able to get them
im unsure of witch circuit would be ideal for my situation, it will be on and running 24/7, i plan to build at least 2 so have backup's in case needed
PWM dimming? I think you will find your lighting too dim to start with. 50 Watts (maybe 700 lm?) is more suitable for a closet.
Maybe 6 LEDs in series and a 350 mA current limiter circuit per lighting assembly. Maybe five lighting assemblies for a 12 by 12b room? Still dim, but livable.
A diffused filter is suggested. Those LEDs might be hard on the eyes without it. White translucent plexiglass?
Build a prototype and see if you can live with it first.
One dimmer for the whole system??? Dimmer in each room? Or no dimmer at all.