Start here

• Why your Wi-Fi is fine and your DNS is not

  Four commands, in order. The order is the whole article, and it is the piece people send to their families.

• Troubleshooting by smell: noticing what’s off before you know why

  The useful part of experience is the flinch you get half a second before you can explain it. My best attempt at teaching that.

• What I learned building a quiz app for 200 people in a noisy room

  Everything that broke was something I had already been warned about. A catalogue of ignored advice.

• The oscilloscope is not the hard part

  On buying test gear you do not yet know how to use, which I recommend doing.

• The scoring screen finally survives a projector

  A short build log, if you would rather see the work than read about the theory.