Troseph

Javascript view images linked on page

Troseph — Sat, 21 Aug 2010 02:21:21 +0000

<br /> javascript:document.ondragstart=function(){return false};dst=function(e){return (p=Math.pow)(p(e.clientX-(rc=e.target.getBoundingClientRect()).left,2)+p(e.clientY-rc.top,2),.5)};$(“[href\x2a=imgur]“).not($(t=”[href$=jpeg],[href$=gif],[href$=png],[href$=jpg]“)).each(function(){this.href+=’.jpg’});void($(t).not(“.EGraw,.click-gadget a,.domain a,.thumbnail”).attr({‘class’:'%45%47%72%61%77′,target:’blank’}).each(function(){$(this).append($(‘<span />‘).toggle(function(e){$(this).html(‘ [-]‘).nextAll().show();return false},function(e){$(this).html(‘ [+]‘).nextAll().hide();return false}).click()).append($(‘‘).attr({src:this.href,style:’display:block;max-width:780px;height:auto’,title:’Drag to resize’}).mousedown(function(e){(t=this).iw=t.width;t.d=dst(e);t.dr=false;e.preventDefault();}).mousemove(function(e){if((t=this).d){t.style.maxWidth=t.style.width=((dst(e))%2At.iw/t.d)+”px”;this.dr=true}}).mouseout(f=function(e){this.d=false;if(this.dr)return false}).click(f)).append($(‘<span />‘).html(‘%26#8635;’).click(function(e){(i=$(t=this).prev()).css({MozTransform:r=’rotate(‘+(t.rot=(t.rot?(++t.rot):1)%4)%2A90+’deg)’,WebkitTransform:r,filter:’progid:DXImageTransform.Microsoft.BasicImage(rotation=’+t.rot+’)',marginBottom:(m=t.rot%2?(i.attr(‘width’)-i.attr(‘height’))/(1+(nie=!$.browser.msie)):0)+’px’,marginTop:(m=nie%2Am)+’px’,marginLeft:-m+’px’,marginRight:-m+’px’});return false}))}))<br />

LCDs and Arduino

Troseph — Tue, 13 Jul 2010 20:27:25 +0000

http://www.ladyada.net/learn/lcd/charlcd.html

Notch Peak trip 1 2010

Troseph — Wed, 16 Jun 2010 14:30:25 +0000

View Larger Map

This Summers’ Goals

Troseph — Wed, 19 May 2010 00:11:47 +0000

Catch, cook and eat a grasshopper
Think of better goals.

Scooter LED’s

Troseph — Mon, 26 Apr 2010 16:26:47 +0000

I dropped my flash light last week and the switch stopped working and since it was about time to get a new light I started hacking its guts into my scooter as a backup/emergency headlamp. I’m really happy with the results.

I wired a rocker switch on the “dashboard” of my scooter, which is wired to the scooters 12v battery and ground on one side and the voltage regulator I designed with a 7805 regulator and two 16v 220uF capacitors.

I took a couple pictures with my iPhone. The results aren’t drastic, but it would definitely help if both the orginal headlamps go out at the same time (again).

Without LEDs

With LED's

Here’s the schematic I made in Inkscape.

iPad’s target audience found [webjunk]

Troseph — Wed, 14 Apr 2010 16:03:05 +0000

KSL Censoring Comments

Troseph — Wed, 14 Apr 2010 00:56:22 +0000

Its a hard life trollin’.

So I posted 5 or so comments today then this!

I don’t happen to be a newb:

Over 3 years! WTF, KSL? I guess I’ll have to find somewhere else to troll.

Why I love Reddit.com

Troseph — Wed, 14 Apr 2010 00:29:08 +0000

Coop door opener update.

Troseph — Thu, 11 Feb 2010 23:35:24 +0000

Here are some pictures of my coop door opener. Its coming along… slowly. So far I have built the winch assemboly, the motor driver and the light sensor. I have some code done, but I’ve been having issues with using the Arduino Time Library without syncing time. Here are some pictures of the build.

I’m really happy with the BBB freeduino I’m using for this project. But I think next time I’ll just make a custom ‘Roboduino’ pcb.

Here is a schematic if you’re interested.

This is the motor driver wiring.

The light sensor uses a photocell and a 330 Ohm resistor.

Here is the actual winch that will pull the cable that lifts the door. Its built from a cd-rom drive, legos, and plywood.

Ohms law

Troseph — Wed, 27 Jan 2010 21:31:07 +0000

I bought Make: electronics ebook from the app store yesterday and haven’t been able to put it down. Ever wonder why you have to put a resistor on your LED? or WTF a resistor actually does? This book answers all those “But why?” questions. The first of the basics this book covers is resistance.

A week ago I was asking “k, wtf is an ohm?” Now I know it’s just stupid maths. This is the formula for calculating resistance(Ω), voltage(V) and current measured in amps(I).

V=(I*Ω)
I=(V/Ω)
Ω=(V/I)

So an example of figuring out voltage lost through resistance would be like so: Say you have a wire that has a resistance of .6Ω resistance and you need to run 12 amps through it. Due to the resistance you’re going to lose some voltage. So what we know is Ω=.6 and I(amps)=12 so your equation will need to be V=(12*0.6) which happens to be 7.2 V.

What would the implications of this be? Serious, if you’re using a 9v battery you’re going to be cut down to 1.8v. That is why car battery wires are really thick, to lessen resistance.

Another example of Ohms law would be an LED with a proper power supply. If your LED reccomends you use 3v at 12mA and you have a 9v battery, which resistor should you pic? V in this equation stands for the difference in voltage between the battery and the LED. So you take 9-3=6. We’ll need to trim 6V. And the amperage we’re looking for is 12 miliMmps or .12 amps. So the math would look like this:

Ω=V/I or Ω=6/.12 or 50Ω

The resistor you’ll need is a 50Ω to properly light this made up 3v 12mA LED with a 9v battery.

Anyway, this is more for me than anyone. Enjoy.