Hi everyone!
I want to run a simulation with step motor and arduino mega but I can't find them in autodesk thinkercad.Then I see this image but I don't know which website is it. Can somebody tell me???
thankyou!!!
We can tell you if you promise never to post one here.
(Maybe turn your keyboard over and give it a shake - it looks like your punctuation keys are sticking)
I‘m so sorry for my bad English 
The software is called Fritzing and the more experienced people here detest it; it makes colourful pictures that are often a mess.
Well the point is that we don't like this sort of thing round here. They are only used by people who know little about electronics.
The sort of person who can't read the forum headings, like where this was originally posted in the installation and troubleshooting section which says it is NOT for your projects.
So I have moved it to a section where you might find an individual that is willing to spread he cancer of this sort of drawing.
Thank you for your remind and I'll pay attention next time. 
Thank you！
Isn't it sad that the Arduino.cc people use Frizzing!
Have a look at that particular image. You can't read the name of the pins on the Arduino, nor on the stepper drivers. Who knows their order by heart? Who bothers to google the pinout images of them to understand the image?
It’s sad that those pictures are used but the schematics and pcb’s it produces are fine and simple to use .
I’m still using it , but start with the PCB layout after sketching up a circuit in my lab book - which in the days of laying out with tape was how it was done.
I keep trying to switch over to Eagle , which has some great features but setting up parts drives me nuts and I give up . It would be good if someone had a simple parts library to start you off ( couple of resistors , half dozen transistors etc)
EAGLE comes with lots of parts. Making your own is not to bad after the first 2 or 3. I use EAGLE 6 to make schematics and PCB layouts.Bought it years ago, but the current free version will let you make up to 800MM x 1000MM I think.
Fritzing is probably the best app out there for drawing semi-realistic pictures of protoboard or modules+jumper based circuits.
However:
- It's not that good. It takes pretty significant effort to make a GOOD semi-realistic picture; almost as much as with a generic drawing program.
- It rapidly becomes less useful as circuit complexity gets worse.
- A "realistic" picture of a circuit is actually not very useful, except perhaps for "how to build it" tutorials. If you are trying to analyze or debug a circuit, a schematic diagram is much more useful. In theory, Fritzing can also print schematics, but it's even harder to get those to look nice.
- A "good" schematic/pcb program (like EAGLE or KICAD) has a bunch of additional features that make is much more useful.
When you post your schematic, a hand drawn circuit in jpg or png is far preferable over a pretty Fritzing picture. A schematic is way simpler and easy to understand than a physical layout. The schematic is a functional description describing the flow of operation. The symbols actually describe functions and are read as such, something Fritzing does poorly. Using Fritzing will reduce the pool of folks prepared to even look at your problem. Do not hurry drawing a schematic, it is a very valuable tool to help you and us understand your project. On paper, just draw a box for each component, label the pins used and draw the connections.
Personally, I like Autodesk Eagle. It's free for small boards, and I've never run into the limits. The hardest part of using Eagle is finding the parts in the huge collection of libraries.
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