the ladder · rung 8 of 10
Level 8 · Environment
Measure weather, soil, and the room.
Real sensors, real numbers. Temperature and humidity from a single small chip, soil moisture from two spikes in a pot. Now your code has something to react to — a plant that asks for water, a room that says it's too dry.
New in the box
- Temperature + humidity sensor (DHT11) — Reads the room: how warm, how humid.
- Soil moisture sensor — Tells you when a plant is thirsty.
with everything through L8, your box now holds 33 component types.
Projects at Level 8
No Level 8 projects yet. The new parts above are catalogued and reviewed; the projects that use them are still being drafted and breadboarded. In the meantime, everything from the earlier levels still works — pick one below.
Earlier projects you can still build
Every project at Levels 1–8 draws on the components you now own — earlier projects never stop being useful. With the full L8 box you can tackle any of these 81 projects:
🔦 First Light · 📡 Morse Code Messenger · 🎈 Twin Reds · 🌿 Two Greens · 🌙 Night Pin · 🚦 Tabletop Traffic Light · 🚲 Bike Torch · 🚦 Signal Pair · 🕯️ Dim Candle · 🔴 Three Sisters · 🥀 One for All · 📶 Step Up · 🪜 Longer Loop · 🔦 Bright and Dim · 🌈 Rainbow Loop · 🔆 Reserve Beacon · 🚫 Short Cut · 🔐 The Vault · 🚪 Do Not Disturb Sign · 🤝 Handhold Chain · 🚪 Two-Door Signal · 🚨 Signal Light · 🛟 Escape Hatch · 🧪 The Brightness Lab · 🔔 Door Buzzer · 📣 Pocket Beeper · 🎛️ Dial-a-Brightness · 📻 Dial-a-Buzz · 🔧 Continuity Tester · 🚨 Panic Doorbell · 🔈 Whisper Alarm · 🛎️ Two-Tone Doorbell · 🚨 Arm & Ring · 🔔 Twin Bells · 🖐️ Two-Hand Bell · 🔕 Silent Alarm · 🎮 Quiz Buzzer · 🔊 Loud/Polite Doorbell · 🎵 Duet Doorbell · 🔐 Vault Chime · 🤫 Hidden Mute · 🟢 Power Pilot · 🎚️ Shared Knob · 🌙 Automatic Night Light · 🌅 Sunrise Alarm · 🍪 Cookie Jar Alarm · 🪤 Trip Wire Alarm · 🌡️ Warm Hand Alarm · 📖 Reading Light · 🏝️ Vacation Nightlight · 📚 Study Lamp · 🌆 Curfew Beeper · 🤒 Fever Beeper · 🌇 Dusk Chorus · 🎺 Warm Hand Chorus · 🌅 Dawn Chorus · 🚨 Trip-Wire Chorus · 🌙 Night Doorbell · 🚨 Alley Lamp · 🙃 The Upside-Down Transistor · 💨 Puff Button · 🌀 First Spin · 🥤 Safety Blender · 💨 Handheld Fan · 🌞 Sunrise Fan · 🆘 Panic Fan · 🎉 Party Spinner · 🚗 Twin Wheels · 🎚️ Dial-a-Spin · 🕸️ Trip Wire Fan · 🌅 Sun Beacon · 🌙 Dusk Fan · ✋ Warm Hand Fan · ⚖️ The 3.3-Volt Rule · 🪶 The Switch That Uses No Current · 🌙 The Night Gate · 🔋 The Zener Battery Tester · 🔐 The Two-Key Lock · 🚨 The Alarm That Remembers · 🏃 The Four-Step Chaser · 💡 The Two-Switch Hall Light