My friend and I were bored on IRC last night, and where talking about PWM LED controllers. I asked how many could be daisy chained together, then all the maths broke out. I compiled all the facts into a few lines, though. Pretty amazing 
4096 PWM Chips
Control 65536 LED's
Which would draw 1310.72A
Which is 4kW of LED's
$250 in PSU's
Then what about 65,536 XP-G's
Which would cost over $400K in LED's
216kW power draw @ 3.3V
Which would output 22.6 million lumens
Which would be an array of 3.2m^2
COntrolled by 4069 28PDIP packages
Which means soldering 113932 pins
The LED's would require jet turbine liquid cooling
And would output 67kW/m^2
Which means they would be 67 times brighter than the sun
Then, make it run off 18650's ...
Which would require 650kg of batteries, which could result in a 650kg lithium fire.
Put them all in series and you would have a string almost 1km long
It would take almost a month to charge the whole string, if you charged 20 for 1 hour
To charge them all at once would require a 3932.1A lithium battery charger
How about running it from button cells?
Ok well, that would require 330000 batteries, which would power it for an hour.
If you stacked them, you would have a tower 1.7km tall, and 660kg of button cells
So, to run the array for 1 day from button cells, it would require 3960000 of them.
Which equals about 7.9 tonnes of batteries per day.
What if you wanted to run it for a year? 2892718214.1 button cells of course!
Which would weigh 5 785 436.43kg
Wich would require 159 fully loaded semi-trailers to dump.
What happens if you end up putting a years supply of button cells in series?
you'd end up with 4,339,077,321.15 volts, or 4 billion volts!
4096 PWM Chips
Control 65536 LED's
Which would draw 1310.72A
Which is 4kW of LED's
$250 in PSU's
Then what about 65,536 XP-G's
Which would cost over $400K in LED's
216kW power draw @ 3.3V
Which would output 22.6 million lumens
Which would be an array of 3.2m^2
COntrolled by 4069 28PDIP packages
Which means soldering 113932 pins
The LED's would require jet turbine liquid cooling
And would output 67kW/m^2
Which means they would be 67 times brighter than the sun
Then, make it run off 18650's ...
Which would require 650kg of batteries, which could result in a 650kg lithium fire.
Put them all in series and you would have a string almost 1km long
It would take almost a month to charge the whole string, if you charged 20 for 1 hour
To charge them all at once would require a 3932.1A lithium battery charger
How about running it from button cells?
Ok well, that would require 330000 batteries, which would power it for an hour.
If you stacked them, you would have a tower 1.7km tall, and 660kg of button cells
So, to run the array for 1 day from button cells, it would require 3960000 of them.
Which equals about 7.9 tonnes of batteries per day.
What if you wanted to run it for a year? 2892718214.1 button cells of course!
Which would weigh 5 785 436.43kg
Wich would require 159 fully loaded semi-trailers to dump.
What happens if you end up putting a years supply of button cells in series?
you'd end up with 4,339,077,321.15 volts, or 4 billion volts!
but still it's neat to know these things
