I'm using a touch-screen device (a smartphone or a tablet) to access this site.
Hence, the built-in circuit lab won't work for me. What do I do to add a schematic to my question?
We take any kind of schematic, as long as it's clean.
Get a piece of paper, a ruler, a pen and get drawing and draw a clean schematic:
Then, take a good photo.
Hints for taking good photos:
All that can be done with any modern smart phone or tablet.
OK, could be brighter and slightly more evenly lit, better white balance. This works, however.
A shadow obscuring parts of the image. Sometimes hard to avoid when not having a lot of ambient light.
Used flash: image overexposed in the center, underexposed elsewhere. Also, upside down, unsharp.
Needs cropping. The relevant part only takes up a small fraction of the image area.
Needs to be upright.
Picture above is out of focus. Camera was too close to paper.
Still out of focus, though not as badly, but still too close. Having more pixels of your schematic doesn't help if they're blurry!
Pictures taken at an angle. A very common mistake, because one rarely looks at a piece of paper from straight above. However, one typically looks at a screen in a very straight way, so this isn't great.
Notice how due to the difference in distance, some parts are out of focus.
Overcompressed; rarely happens these days, but when using image compression apps, make sure you avoid having such visible JPEG artifacts.
I once had a boss with lots of experience and a PhD but did not know how to use a computer, but he knew the power of a pencil.
Meaning: you don't need computer skills or even a schematic editor to be a great engineer.
This was filtered from @MarcusMüller 's last photo.
But you need some computer skills to make a readable photo.