There's also this web-based thing, meant to have screenshots taken of it:
http://www.qsl.net/wd9eyb/klunky/framed.html
But could it be modified to generate code that could be copied and pasted into this site? Something that generates a single image would be preferable, of course.
http://www.qsl.net/wd9eyb/klunky/0.jpgR http://www.qsl.net/wd9eyb/klunky/r24.jpg
R http://www.qsl.net/wd9eyb/klunky/r13.jpgnpn http://www.qsl.net/wd9eyb/klunky/npn.jpg
http://www.qsl.net/wd9eyb/klunky/0.jpgR http://www.qsl.net/wd9eyb/klunky/r24.jpg
There's a real need for a quick web-based schematic drawing tool, not just here, but everywhere. I would code it if I knew how, but my skills are weak. Could we somehow commission someone at Stack Overflow to write something in exchange for reputation points? In exchange for money? Kickstarter? A simple JavaScript editor could allow for blocks to be put next to each other, like this Klunky editor, then it could generate a URL with a bunch of gibberish at the end, which then causes the server to generate a single PNG, for instance.
The image could be linked directly from forums or copied to Imgur automatically by the Stack Exchange software. The URL of the image could be plugged back into the editor to allow modifications, etc.
The text labels in Klunky could use some work, too.
Or if Stack Exchange accepted data: URLs, it could generate an image that could be copied and pasted into the URL box without requiring a server at all. :)
Or SVG. Or Flash. Or something. But I think a simple block-based editor would be sufficient for the vast majority of online schematic examples, rather than a full-fledged schematic capture program that allows you to draw wires manually and move components one pixel at a time and change all their parameters.
Here's an HTML 5 image editor that generates images as data: URLs, for instance:
Data URLs can be converted into tinyurls!