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How can i draw a diagram out of this?

I need help to draw a diagram of this picture the project include an Arduino nano, dht11 sensor, power module IRF520, 12V power supply and a fan

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    You already have done, haven't you?
    – Majenko
    Jun 3 at 7:51
  • Or do you mean a schematic? That can be done by various tools, for example Eagle ir KiCAD (though that is only a small part of their functionality)
    – chrisl
    Jun 3 at 8:46
  • I mean schematic Jun 3 at 9:15
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    Do you want to create a schematic that contains the contents of the other modules? Then you need to get the schematics of those modules and copy them, then join them up with lines, just as you have here.
    – Majenko
    Jun 3 at 9:26
  • If you don't need the contents of the modules, then the schematic pretty much boils down to a block diagram. You can do this with Windows Paint, or whatever drawing program you are familiar with... no need for any specialized schematic software with a big learning curve. Just draw trial sketches with pencil and paper, then when you have the layout you like, create the same in Paint. Tip: Create a separate Paint image with any symbols you want to use, like upward-pointing power arrow, ground symbol, wire cross. Keep that open and copy/paste into your final drawing.
    – Boggyman
    Jun 3 at 12:18
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See Rules and guidelines for drawing good schematics on electronics.stackexchange.com.

I'm no expert but perhaps some of what I have found will be of help.

To produce a clear easy-to-read useful schematic it doesn't really matter what tools you use. This website has a reasonable schematic editor so I suggest you could try that to start with.

Other tools I have tried include KiCAD, EasyEDA and Fritzing. KiCAD is maybe a bit hard to start with and Fritzing I find is very troublesome - It's good for the kind of breadboard layout diagram it was originally designed for. I have really enjoyed using EasyEDA. Other notable tools include Eagle. All these are free or have free versions for hobbyists. Beyond that are more capable and sophisticated professional tools.

Drawing a good schematic is an art and taking care of small details makes a big difference to how useful the diagram is.

The main features that I find make schematics for me to read are

  • Ground connections at bottom edge of diagram.
  • Positive voltage connections at top edge of diagram.
  • Left to right flow for signals and power (e.g. battery at left, microprocessor in middle, LEDs, motors etc at right)
  • Avoid having wires cross. Adjust the pin positions on an IC symbol to make this possible.
  • Label everything clearly but don't let text overlap with anything else.

schematic

simulate this circuit – Schematic created using CircuitLab

The way you appear to be powering these modules seems a bit eccentric but this would be how I might draw that as a block-level schematic.

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