I sometimes need to make diagrams(not circuit details) to explain the system(how the devices are interconnected as a big picture):

Here a primitive one in MSPaint:

enter image description here

Is there a better adhoc program for this purpose?

  • 1
    Try Libreoffice Draw. It's free! libreoffice.org
    – calcium3000
    Commented Oct 13, 2017 at 11:19
  • Or draw.io might suffice.
    – Transistor
    Commented Oct 13, 2017 at 11:21
  • 1
    or "dia" or "visio" etc.
    – Jasen
    Commented Oct 13, 2017 at 11:26
  • 2
    Dia or inkscape
    – Colin__s
    Commented Oct 13, 2017 at 11:38
  • yworks.com/products/yfiles/gallery
    – Mawg
    Commented Oct 15, 2017 at 10:50

2 Answers 2


I have come to like the Scheme-It tool from Digikey, it works pretty well for the task you describe. I have also used Lucid-chart and draw.io. The Latter interfaces with the google office tools pretty well.


A free and pretty nice vector drawing tool is GravitDesigner. It can handle all sorts of graphics. You can try it on-line or download it for almost any device including Windows, MacOS, Android, ChromeOS, and Linux.

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