Hardware vibe coding is the new big thing. Here are 15 hardware projects where the parts are cheap and on Amazon, needs no soldering, and AI can write all of the code. Most use an ESP32 or Raspberry Pi. 1. E-ink desk dashboard. ESP32 plus an e-paper screen showing your calendar, weather, transit times or to-dos. It refreshes a few times an hour and runs for weeks on a battery. 2. CO2 / air quality monitor. An SCD40 or PM2.5 sensor plus a small display, with color alerts when you should open a window. 3. Plant moisture alert. A soil sensor on an ESP32 that texts or pushes a notification when a plant needs water. 4. Macro pad / mini stream deck. An RP2040 board with a few keyswitches and a knob, running KMK or QMK firmware, for shortcuts, mute toggles or app launching. 5. “On a call” status light. An LED strip or sign outside your door that turns red automatically from your calendar, Zoom or Slack status. (This was actually the first thing I ever built when I got into hardware) 6. Desktop voice assistant. An ESP32-S3 with a mic and speaker (like an M5Stack or ESP32-S3-Box) that sends your voice to an LLM API and speaks the reply. 7. LED matrix ticker. A 64x32 RGB panel scrolling stock prices, sports scores, Spotify’s now-playing or your GitHub stats. 8. Smart garage door opener. An ESP32 plus a relay and a reed switch, set up with ESPHome or Home Assistant, so you can open the door and check it from your phone. 9. Mailbox or doorbell notifier. A reed switch or vibration sensor that pings your phone when mail arrives. LoRa works for long distances. 10. AI bird feeder camera. A Pi or ESP32-CAM that snaps photos on motion and uses a vision model to identify and log species. 11. Thermal printer to-do list. A cheap receipt printer that prints your daily tasks, tickets or a morning brief each day. 12. Kids’ NFC audio player. NFC cards trigger stories or songs on an ESP32 plus a DFPlayer, a DIY Yoto/Toniebox. 13. BBQ / sous vide temperature monitor. Thermocouple probes on an ESP32 with a phone dashboard and alerts when the food hits target temp. 14. Automatic pet feeder. A servo or stepper on a schedule, with a button or app trigger and an optional camera. 15. Retro handheld or desk arcade. A Pi with a small screen and buttons running RetroPie, or an ESP32 running simple games AI writes from scratch. What makes this as easy as vibe coding: - plug-and-play connector (Seeed Grove, SparkFun Qwiic, Adafruit STEMMA) so there’s no soldering - use ESPHome or Arduino/MicroPython so the AI has tons of reference code to draw on The only real “hard” parts left are enclosures, and the frontier models can now vibe-code 3D designs and give you STL files from the terminal. I'm doing a live session on this tomorrow at noon (see attached post).