16 more posts in this thread. [Missing image file: fuente%20impresora%20canon%20k30290.jpg]
I salvaged this power supply from a printer (model number K30290) and I want to use it as a lab power supply. It has 5 wires: one blue, one yellow, one red, and two black. The back says the output is 24V 0.5A and 32V 0.85A.
The problem is, when I measure the voltage of the wires, red has 7.48V, and blue shows 9.91V. Is this normal?
Another thing, the yellow wire outputs no power. What's it for?
12 more posts in this thread. [Missing image file: 2008-3-17-pingdesk1.jpg]
I'm sick of seeing how expensive very simple furniture is (extremely plain tables and desks, mostly) and I'm thinking I'd like to try to learn how to build my own quality furniture.
I could go out and buy wood and nails and get to it, but I want to build it to last and build it right the first time, so I'm here to ask either for:
>Your basic advice and instructions for simple projects to start with (like a nightstand table)
>Or resources that will help me on the route to building furniture. Places to order nice straight wood for cheap, instructions for key building methods, stuff like that.
Let's see what you've got, /diy/!
DIY composite blocks
16 more posts in this thread. [Missing image file: cobblestone3.jpg]
i am wondering if anyone knows how Timbercrete is formed? ( pic related - http://www.timbercrete.com.au/cobblestone-200.html )
from what i know, it is simply sand + concrete + sawdust, though i haven't seen this stuff in real life, which would really help..
( alternatively Fibrecrete or Maqcrete )
i am really interestd in composite building materials as of lately, if anyone wants to reccomend some materials or talk, that would be sweet
Convert byte to a Number String
23 more posts in this thread. [Missing image file: 1350869197814.jpg]
Lets say you have a 2 MB byte array, being the first bytes the most significant bytes and the last one the lest significant. i.e.
2 * 256 * 256 * 256 = 33554432
1 * 1 = 1
Decimal = 33554433
And you want to convert that "endless" chain of byes to a unsigned decimal, something like this:
input = FF,00,23,44,52,12,44,A0,DE,AD,BE,EF,F0,F0
output = 082397459283742370597423095724390752L
How would you do it?
I needed to convert a 128 bit string (UUID, GUID) to Code128C (because in Code128C, every 2 decimal digits is one single char) So I decided to convert 128 bit in C# to Decimal.
a 128 bit number represented as Decimal will be as long as 39 decimal numbers, so I work around using 2 64 bit number (ulong) and using 40 decimal numbers, so my actual problem was solved.
But I was thinking... what if I wanted to put a infinite amount of data into a Code 128C barcode... What if I wanted to represent a huge number without loosing any precision.
in C#, you can only have this types:
Decimal (holds 128 bits with a Mantisa, so no good)
Double (don't know, but its not infinite)
Long (64 bits)
int (32 bits)
Of course, there is always the workaround on using a huge string and implementing your own Math operations.
You could also use BCD and code 2 digits on a single byte but no...
I want what algorithm would someone need to implement to convert a "Endless source of Bytes" to a "Endless chain of decimal numbers".