A full tutorial wiring a soil sensor and pump so plants water themselves. Genuinely useful and finishable. Budget for a pump, tubing, and an ADC for the analog sensor. Resource: Make a plant-watering robot (Viam) — https://docs.viam.com/tutorials/projects/make-a-plant-watering-robot/ (Viam) How many plants would this save in your home?

Explains what the undervoltage symbol means and why cheap chargers and thin cables cause it. Important because undervoltage quietly corrupts data and throttles performance. Clear and technical without being heavy. Resource: Understand the undervoltage 'lightning bolt' — https://kevinboone.me/rpi_undervoltage.html (Kevin Boone) Have you been bitten by a bad power supply?

Configures hostapd and dnsmasq so the Pi broadcasts an access point. Useful for a travel router, a lab network, or extending coverage. Some steps changed under newer Pi OS, so check the version notes. Resource: Set up a wireless access point on the Pi — https://raspberrypi-guide.github.io/networking/create-wireless-access-point (The Raspberry Pi Guide) What would you use a Pi-hosted Wi-Fi network for?

My Pi fame was to write the code and to play and construct a 3D Tic Tac Toe or O's and X's - ran on about 300 lines of PYTHON 2 code and use my own PCBs (x3) and 30 RGB LEDs - how many ways can you get a winning line in 3D Os and Xs - I sold my first prototype but still have more PCBs to use...

Jeff Geerling walks through PiVPN with WireGuard, including DNS, port forwarding, and phone setup with a QR code. Clear and honest about security responsibilities. Requires a public IP or workaround; CGNAT users will need Tailscale instead. Resource: Build your own WireGuard VPN with PiVPN — https://www.jeffgeerling.com/blog/2023/build-your-own-private-wireguard-vpn-pivpn/ (Jeff Geerling) WireGuard or OpenVPN for a home server, and why?