All projects
Every build on the site: drones, RC cars and boats, robots, smart home, retro gaming, servers, cameras, weather, garden, radio, cyber defense, AI, wearables and 3D printing.
Drones & UAV
Learn to Fly FPV in a Simulator with Your Real Radio
Plug your ExpressLRS/EdgeTX radio into a computer as a joystick and crash for free before you ever buy a battery.
RecruitPre-Flight LiPo Cell Checker with a Raspberry Pi
Plug in a pack's balance lead and see every cell's voltage, the imbalance and a GO / NO-GO verdict on an OLED.
TechnicianFPV Ground Recorder and Spectator Screen with a Raspberry Pi
Capture the analog video from your goggles or a receiver, record every flight and show it live on a TV for friends.
TechnicianBuild Your First 5-Inch FPV Drone
Frame, motors, flight controller stack, ExpressLRS radio and Betaflight setup — a complete first quad build.
EngineerPi Zero Drone Camera and GPS Flight Logger
Record 1080p video automatically on power-up and log your GPS track for mapping later.
EngineerWi-Fi Telemetry Ground Station for ArduPilot
Route MAVLink from your drone's companion Pi to QGroundControl on a laptop, phone or tablet at the same time.
EngineerDrone Payload Drop with a Servo Release
A 3D-printed hook opened by a servo from a switch on your radio — for fishing lines, markers or rescue tests.
EngineerAnalyze Drone Flight Logs with Python on a Pi
Read ArduPilot .bin logs, plot altitude, battery and vibration, and find out why a flight went wrong.
EngineerAirspace Awareness Box: Manned Aircraft Alerts at Your Flying Field
A portable ADS-B receiver warns you with a buzzer when a plane or helicopter comes low and close to where you fly your drone.
EngineerRaspberry Pi Companion Computer for an ArduPilot Drone
Connect a Pi to the flight controller over MAVLink, read telemetry and send autonomous commands from Python.
CommanderRC Cars & Boats
RC Car Speedometer and Battery Telemetry on Your Phone
A magnet, a Hall sensor and an ESP32 measure real speed and pack voltage and stream them to a web page.
TechnicianBuild a Rover with 3D-Printed Parts from the Vault
Combine our free Pico plate, battery cradle and ultrasonic bracket into a Wi-Fi rover you drive from your phone.
TechnicianRC Lap Timer with an Infrared Gate
An IR break-beam across the finish line records every lap to the millisecond and shows a leaderboard.
TechnicianUpgrade a Cheap Toy RC Car with an ESP32
Replace the toy's receiver board with an ESP32 and a motor driver and drive it from your phone over Wi-Fi.
TechnicianRC Crawler Scout Camera with a Pan Servo
Keep your normal radio for driving, add a Pi Zero camera that streams to your phone and a servo that turns it from a spare channel.
TechnicianRC Jump Meter: Airtime and Landing G-Force with a Pico
An IMU on your basher detects free-fall, times every jump and records how hard you landed.
TechnicianSmart RC Car: Drive from Your Phone with a Live Camera
Replace the RC receiver with a Raspberry Pi and control steering and throttle from a web page.
EngineerSelf-Driving RC Car with DonkeyCar and a Neural Network
Drive laps to collect data, train an AI model on your computer and let the car drive itself.
CommanderAutonomous GPS RC Boat with ArduPilot Rover
Plan waypoints on a map and let your boat survey a lake or canal on its own.
CommanderRC Car That Drives Back to Start with GPS
Write your own navigation code: the Pi remembers where you started and steers the car home at a slow, safe speed.
CommanderRobotics
Obstacle-Avoiding Robot with Raspberry Pi
A 4WD rover that measures distance with ultrasound and turns away from walls on its own.
TechnicianLine-Following Robot with Raspberry Pi Pico
Infrared sensors spot a black line and a $7 microcontroller steers the robot along the track.
TechnicianDrive a Robot with a Bluetooth Game Controller
Pair a gamepad to the Pi and map the analog sticks to tank-style motor control with gpiozero and evdev.
TechnicianDesk Robot with OLED Eyes and a Turning Head
Two tiny screens make animated eyes that blink, look around and widen when you come close — a little companion that teaches animation and sensors.
Technician6-Axis Robotic Arm Controlled by Raspberry Pi
Drive six servos smoothly, record poses and replay pick-and-place sequences.
EngineerPan-Tilt Camera That Follows Your Face
Detect a face with OpenCV and steer two servos so the camera keeps it centered — the first step to a robot with eyes.
EngineerVoice-Controlled Robot That Works Offline
Say 'forward', 'left' or 'stop' and an offline speech engine drives the motors — in English or Spanish.
EngineerRobot That Chases a Colored Ball with OpenCV
The camera finds a bright ball by its color and the robot turns and drives toward it — your first real computer-vision robot.
EngineerWi-Fi Coverage Mapping Robot for Your Home
Drive a robot to marked spots around your home, log your own network's signal strength and turn it into a heatmap of dead zones.
EngineerMini-Sumo Robot with a Raspberry Pi Pico
Build a small, low, pushing robot that finds its opponent with ultrasound and stays inside the ring using edge sensors.
EngineerRoom-Mapping Robot with LiDAR and ROS 2 SLAM
Drive a robot around your house and watch it build a floor plan in real time with slam_toolbox.
CommanderSelf-Balancing Robot with a Pico and a PID Controller
A two-wheeled robot that stays upright by reading an IMU hundreds of times per second — control theory you can see.
CommanderSmart Home
Home Assistant on Raspberry Pi 5: Your Smart Home Brain
Install Home Assistant OS and control lights, plugs and sensors locally — no cloud required.
RecruitGarage Door 'Left Open' Alert
A magnetic reed switch and a tiny ESP32 tell your phone when the garage stays open after dark.
RecruitWater Leak Alarm Under the Sink
A cheap water sensor and a tiny ESP32 send a phone alert the moment water appears near a heater, washer or sink.
RecruitESPHome Room Sensor: Temperature, Humidity and Motion
Build a $20 Wi-Fi sensor with an ESP32 and add it to Home Assistant with a few lines of YAML.
TechnicianSmart Mirror with MagicMirror²
Time, weather, calendar and news glowing through a mirror — open-source software behind two-way acrylic.
TechnicianmmWave Presence Sensor: Lights That Know You're Still There
Unlike PIR, a 24 GHz radar sensor detects people sitting still, so lights stop turning off while you read.
TechnicianBuild Your Own Zigbee Hub with Zigbee2MQTT
Use cheap Zigbee sensors and bulbs from any brand without their proprietary hubs or cloud accounts.
TechnicianMailbox Notifier: Know When the Mail Arrives
A tiny ESP32 sleeps inside your mailbox for months and wakes up only when the flap opens to ping your phone.
TechnicianFamily Check-In Board with RFID Tags and a Touchscreen
Tap your key-ring tag by the door and the screen shows who is home and who is out — no phone tracking needed.
TechnicianWasher and Dryer 'Done' Notifier with a Vibration Sensor
Stick a tiny accelerometer on the machine and get a phone alert when the cycle ends — no wiring into the appliance.
TechnicianPrivate Voice Assistant That Runs in Your House
Speech-to-text, text-to-speech and wake words processed locally with Home Assistant Assist.
EngineerSmart Motorized Blinds with a Stepper Motor
Open the blinds at sunrise and close them when the room gets hot, using a stepper motor and ESPHome.
EngineerRetro Gaming
Retro Game Console with Raspberry Pi
Turn a Pi into a plug-and-play emulation console with Batocera or Recalbox.
RecruitLiving-Room Media Center with LibreELEC and Kodi
A silent, fast media player for your own movies, music and photos, controlled by your TV remote.
RecruitStream PC Games to Your TV with a Raspberry Pi
Play your PC library on the living-room TV with Moonlight and Sunshine — low latency over your home network.
RecruitFantasy Console Station: Make and Play Games with PICO-8 and TIC-80
Turn a Pi into a tiny retro console where you can play thousands of community games — and write your own in Lua.
RecruitPlug-and-Play Retro TV Console with a Pi Zero 2 W
A console smaller than a candy bar that hides behind the TV — plug in power and two controllers and play.
RecruitPortable Retro Console with a 7-Inch Touchscreen
Mount a Pi behind a touchscreen, add a battery and a controller and game anywhere.
TechnicianProgram Your Own Pocket Game on a Pico and OLED
Write a dodge-the-asteroids game in MicroPython on a 128×64 screen with three buttons.
TechnicianPlay Retro Games Online with a Friend Using RetroArch Netplay
Two-player classics over the internet: your Pi and your friend's machine run the same game in sync.
TechnicianScrolling LED Marquee for Your Arcade Cabinet
A glowing pixel sign that scrolls your arcade's name in rainbow colors, driven by a Pico and MicroPython.
TechnicianBuild a Two-Player Bartop Arcade Cabinet
Cut a cabinet, wire real arcade sticks and buttons and drop in a Pi for the full arcade feel.
EngineerPocket Retro Handheld with a Pi Zero 2 W
A Game Boy-style handheld with a small screen and real buttons wired straight to the GPIO pins.
EngineerHome Servers
Pi-hole: Block Ads and Trackers on Your Whole Network
A tiny DNS server that filters ads for every phone, TV and laptop in the house.
RecruitOne Dashboard for Your Whole Homelab with Homepage
A clean start page with links, live status and widgets for Pi-hole, Jellyfin, Immich and every other service you run.
RecruitHome NAS and Jellyfin Media Server
Share files across the house with Samba and stream your own movies and music with Jellyfin.
TechnicianSecure Remote Access to Your Home with a VPN
Reach your Pi projects, NAS and Home Assistant from anywhere without opening ports.
TechnicianDocker on Raspberry Pi: Your First Containers
Install Docker, run Uptime Kuma to watch your websites and devices, and learn the self-hosting workflow.
TechnicianYour Own Private Cloud with Nextcloud
Sync files, back up phone photos and share folders from a Pi you control — a self-hosted alternative to cloud drives.
TechnicianPrivate DNS: Pi-hole + Unbound Recursive Resolver
Stop sending every website you visit to a third-party DNS provider by resolving names yourself.
TechnicianEncrypted Backup Server with BorgBackup
Deduplicated, encrypted nightly backups of your computers and Pi projects to a drive you control.
TechnicianYour Own Music Streaming Server with Navidrome
Stream your MP3 and FLAC collection to any phone or browser, with playlists and multiple users — no subscription.
TechnicianSelf-Hosted Git Server with Gitea
Keep your code, configs and project files in private repositories on your own Pi, with a web interface, issues and pull requests.
TechnicianPrivate Photo Backup Server with Immich
Automatic phone photo backup with face search and a timeline — like a cloud photo service, but on your Pi.
EngineerGo Paperless: Searchable Document Archive with Paperless-ngx
Scan bills, receipts and letters once, and find any of them in seconds by searching the text inside — in English or Spanish.
EngineerCameras & Security
Motion-Alert Camera That Sends Photos to Your Phone
Detect motion with Picamera2 and OpenCV, save snapshots and push instant notifications.
TechnicianDIY Smart Doorbell with Camera Snapshot
Press the button, get a photo of the visitor on your phone and a chime inside.
TechnicianWildlife Trail Camera with PIR Trigger
Capture animals in your yard with a motion-triggered, battery-powered camera.
TechnicianBaby and Pet Monitor with a Low-Latency Live Stream
Watch a room from any phone or browser on your home network with MediaMTX — private, no cloud.
TechnicianDIY Home Alarm with Zigbee Door and Window Sensors
Arm and disarm from your phone or a wall tablet, with entry delays and alerts when a door or window opens.
TechnicianPi Zero Camera That Records Motion Clips to Your NAS
A small, cheap camera that saves a video clip — including the seconds before the motion — straight to a network share.
TechnicianHelp Button for an Elderly Relative That Alerts the Family
One press on a small wireless button sends a loud, can't-miss alert to everyone's phone — set up together with the person who will use it.
TechnicianPackage Delivery and Pickup Alert with a Smart Weight Mat
Load cells under a board on your porch tell you when a package lands — and when it leaves, so you know if it was taken.
TechnicianAI Security Camera Recorder with Frigate
Record multiple IP cameras locally and get alerts only for people, cars and pets — not swaying trees.
EngineerDriveway Car Alert with Frigate Zones
Get a phone alert only when a car actually pulls into your driveway — not for every car passing on the street.
EngineerWeather & Science
Sky and Storm Time-Lapse Camera
Capture clouds, sunsets and storms every few seconds and render a smooth video.
RecruitTipping-Bucket Rain Gauge on a Raspberry Pi
Count every tip of a rain bucket with a reed switch and log real rainfall in millimetres, hour by hour.
RecruitWeather Station with a Live Web Dashboard
Log temperature, humidity and pressure every minute and view charts from any device on your network.
TechnicianAir Quality Monitor (PM2.5) with OLED Display
Measure fine particles from smoke, dust and cooking with a laser sensor over serial.
TechnicianCO₂ Monitor That Tells You When to Open a Window
A true NDIR-style photoacoustic CO₂ sensor shows indoor air quality in ppm with a color-coded alert.
TechnicianLightning Detector: Know When Storms Approach
Detect lightning strikes up to about 40 km away and estimate storm distance — perfect for Florida summers.
TechnicianVibration and Earthquake Logger with an Accelerometer
Record vibrations from traffic, machines or tremors and see them as a live seismograph.
TechnicianUV Index Monitor with ESPHome
Measure the real UV index in your yard and get a Home Assistant alert before the sun gets dangerous.
TechnicianHurricane-Season Pressure Drop Alert
Track air pressure every 10 minutes and sound a buzzer when it falls fast — the classic sign of an approaching storm.
TechnicianGarden & Farming
Automatic Plant Watering with Raspberry Pi Pico
Measure soil moisture and run a small pump only when your plant is thirsty.
TechnicianAutomatic Chicken Coop Door at Sunrise and Sunset
A 12 V linear actuator opens the coop at sunrise and closes it after sunset, calculated for your exact location.
TechnicianGreenhouse Climate Controller with Automatic Fan
Keep a small greenhouse from overheating: a fan turns on above your target temperature and humidity.
TechnicianAquarium Monitor: Water Temperature and pH
Watch your fish tank's temperature and pH from your phone and get warned before a heater fails or the water turns acidic.
TechnicianMushroom Grow-Tent Humidity Controller
Keep a fruiting tent at high humidity with a humidifier on a smart plug, plus timed fresh-air fan cycles.
TechnicianAutomatic Pet Feeder with a Servo and a Schedule
A 3D-printed hopper with a servo-driven gate drops a measured portion of dry food at set times every day.
TechnicianPond and Pool Water Level and Temperature Monitor
A waterproof ultrasonic sensor measures the water level and a probe reads its temperature, reported to Home Assistant.
TechnicianHydroponics Controller: Pumps, Lights and Alerts
Schedule grow lights and nutrient pumps, monitor climate and get alerts when something drifts.
EngineerSolar LoRa Sensor Node for Far Fields
Send soil and weather readings kilometers away on a tiny battery recharged by the sun.
EngineerSmart Beehive Scale and Climate Monitor
Weigh a hive every hour to track honey flow, swarms and winter stores without opening the box.
EngineerRadio & SDR
Track Airplanes Overhead with ADS-B and an RTL-SDR
Receive aircraft position broadcasts on 1090 MHz and see a live radar map in your browser.
TechnicianShip Tracker: Decode AIS Signals from Vessels
Live near the coast? Receive ship names, positions and courses on marine VHF and plot them on a map.
TechnicianOff-Grid Text Messaging with Meshtastic LoRa
Send texts and GPS positions between phones with no cell service using cheap LoRa radios.
TechnicianListen to the Radio Spectrum from Any Browser with OpenWebRX
Turn an RTL-SDR into a web receiver: airband, weather radio, ham bands and more, with a live waterfall display.
TechnicianNOAA Weather Radio Receiver and Alert Decoder
Listen to official weather broadcasts on 162 MHz and decode emergency alert tones for your county.
TechnicianBring Your 433 MHz Weather Sensors into Home Assistant with rtl_433
Decode the wireless thermometers, rain gauges and door sensors you already own and publish them over MQTT.
TechnicianFM Radio, RDS Decoder and Band Scanner
Listen to FM stations, read the song and station names hidden in RDS, and map the whole FM band.
TechnicianTrack Weather Balloons with an SDR
Receive radiosondes launched twice a day by weather services and follow them to 30 km altitude — then go find them.
EngineerReceive-Only APRS iGate with Direwolf
Decode APRS position and weather packets on 144.390 MHz and, if you hold a ham license, forward them to the APRS-IS network.
EngineerNetwork & Cyber Defense
Internet Speed and Outage Logger
Measure your connection every hour and log every outage — real evidence when you call your internet provider.
RecruitKnow Every Device on Your Network
Scan your own network on a schedule and get alerts when an unknown device joins.
TechnicianNetwork Parental Controls with Pi-hole Groups
Apply stricter filtering only to the kids' devices — and pause social media at bedtime.
TechnicianRaspberry Pi Router and Firewall with OpenWrt
Turn a Pi into a powerful router with VLANs, ad blocking and VPN — between your modem and your network.
EngineerHome Network Honeypot with OpenCanary
A decoy device that alerts you the moment anyone on your network pokes at it.
EngineerSelf-Hosted Password Manager with Vaultwarden
Run a lightweight Bitwarden-compatible server at home and use the official Bitwarden apps on every device.
EngineerSee Who Uses Your Bandwidth with ntopng
A live dashboard of every device, app and destination on your network, from a Pi on a mirrored switch port.
EngineerAudit Your Own Wi-Fi with Kismet (Passive and Legal)
See which channels are crowded, confirm your network uses WPA2/WPA3, and spot fake access points copying your network's name.
EngineerProtect Your Self-Hosted Apps with CrowdSec
Automatically block IPs that brute-force your SSH or web services, using community threat intelligence.
EngineerHome Intrusion Detection System with Suricata
Watch a copy of your network traffic for malware callbacks, scans and known exploits, using thousands of free community rules.
CommanderAI & Computer Vision
Run a Local AI Chatbot on Raspberry Pi 5 with Ollama
Chat with small open language models fully offline — no account, no cloud.
TechnicianIdentify Birds by Their Songs with BirdNET
A 24/7 listening station that names the bird species singing in your yard.
TechnicianReal-Time Object Detection with the Raspberry Pi AI HAT+
Detect people, cars, pets and dozens of objects at high frame rates with a Hailo accelerator.
EngineerControl Lights with Hand Gestures Using MediaPipe
Count raised fingers in real time and turn them into commands: brightness, colors or smart-home scenes.
EngineerOffline Talking AI Assistant: Whisper + Ollama + Piper
Speak a question, a local model answers out loud — speech-to-text, a small LLM and text-to-speech all on one Pi 5.
EngineerAI Pet Detector: A Door That Opens Only for Your Cat
Object detection spots a cat (and refuses raccoons) before a servo unlocks the pet door.
EngineerTalking Text Reader: Camera OCR Read Aloud
Press a button, snap a page, and hear it read aloud — an accessibility helper built with Tesseract and Piper.
EngineerPrivacy-Safe People Counter for a Shop Door
Count visitors in and out with an overhead camera that keeps only numbers — no images are ever saved.
EngineerPlant Disease Classifier with a TensorFlow Lite Model
Point the camera at a leaf and an image-classification model tells you if it looks healthy or shows signs of a common disease.
EngineerRecognize Sign-Language Letters with MediaPipe
Teach the Pi your fingerspelled letters in minutes, then watch it name each one live on screen.
EngineerAI Recycling Sorter: Camera Plus Servo
Drop a can, bottle or paper on the tray and a trained model tilts a servo chute into the right bin.
EngineerWearables & IoT
Light-Up Costume or Jacket with WLED
Hundreds of animated LED effects controlled from your phone — no coding required.
RecruitReaction-Time Game: Your First Pico Project
An LED lights up at a random moment — press the button as fast as you can and see your reaction time in milliseconds.
RecruitCustom Macro Keypad with Raspberry Pi Pico
One-press shortcuts for streaming, editing and coding, using CircuitPython USB keyboard support.
TechnicianPocket GPS Tracker and Trip Logger
Record your route while hiking, biking or boating and upload it over Wi-Fi when you get home.
TechnicianE-Paper Smart Badge and Desk Dashboard
A screen that uses power only when it changes: name badge by day, weather and calendar on your desk by night.
TechnicianDIY Step Counter with a Pico, IMU and OLED
Count steps with an accelerometer, show them on a tiny screen and sync to your phone over Wi-Fi.
TechnicianBike Turn-Signal Backpack with an LED Matrix
Handlebar buttons show bright arrows on your back so drivers know where you are turning.
TechnicianHeart-Rate Display with a MAX30102 and a Pico
Rest a fingertip on an optical sensor and watch your pulse wave and beats per minute on a tiny OLED — a learning project, not a medical device.
TechnicianSmart Hat with Scrolling LED Messages
Sew a flexible LED matrix to a cap and scroll your own messages, switched with a hidden button.
TechnicianESP32 Posture Reminder That Buzzes When You Slouch
A tiny clip-on device learns your upright position and gives a gentle vibration after 30 seconds of slouching.
Technician3D Printing & CNC
OctoPrint: Control and Watch Your 3D Printer Remotely
Upload files, start prints and watch a live camera from any browser in the house.
RecruitFrom STL to Print: Slicing Basics for Makers
Download a free model from our 3D Print Vault, slice it with free software and get a clean first print.
RecruitDesign and 3D Print Custom Parts for Your Robots and Drones
Measure, model, print and iterate mounts, cases and brackets that fit your builds perfectly.
TechnicianDesign Parametric Parts with Code in OpenSCAD
Write a few lines of code to create mounts you can resize by changing one number — then remix our Vault files.
TechnicianFilament Dry Box with a Humidity Monitor
Wet filament causes stringing and weak prints. Seal spools with desiccant and get an alert when humidity rises.
TechnicianFilament Spool Scale: Know How Much Is Left
A load cell under your spool holder reports the grams of filament left in Home Assistant before you start a long print.
TechnicianUpgrade Your 3D Printer to Klipper with MainsailOS
Faster, smoother prints with input shaping and pressure advance, controlled from a modern web UI.
EngineerWireless CNC and Laser Controller with CNCjs
Send G-code to a GRBL CNC router or laser engraver from any browser and watch the job on a webcam.
Engineer3D Printer Enclosure Guard: Heat and Fume Monitor with Auto Shut-Off
Watch temperature and VOC levels inside your printer enclosure and cut power through a certified smart plug if something goes wrong.
EngineerPi-Controlled Pen Plotter with GRBL
Build a two-axis drawing machine that turns SVG art into ink on paper, with a Pi preparing and streaming the G-code.
CommanderSpace & Astronomy
ISS Overhead Alert: Know When the Space Station Flies By
Calculate International Space Station passes for your location and light an LED when it is above the horizon.
RecruitLight-Pollution Sky Quality Meter with a TSL2591
Measure how dark your night sky really is, log it every few minutes and see how the Moon, clouds and street lights change it.
TechnicianTonight's Sky: Moon Phase and Planet Finder on E-Paper
A low-power e-paper frame that shows the Moon's phase and which planets are up tonight, calculated on the Pi with Skyfield.
TechnicianAstrophotography with the Raspberry Pi HQ Camera
Photograph the Moon and planets through a telescope, or star fields with a lens, using long exposures and stacking.
EngineerAll-Sky Meteor Camera for Citizen Science
Record the night sky automatically, detect shooting stars and contribute observations to meteor research networks.
EngineerMotorized Barn-Door Star Tracker for Your Camera
Two boards, a hinge and a stepper motor turn your camera with the sky so stars stay pin-sharp in multi-minute exposures.
EngineerSafe Sunspot Imaging with the Raspberry Pi HQ Camera
Photograph sunspots day after day through a proper full-aperture solar filter and watch the Sun rotate.
EngineerReceive Images Straight from Weather Satellites
Catch a polar-orbiting weather satellite as it passes overhead and decode a picture of your region with SatDump.
CommanderHigh-Altitude Balloon Payload Logger
Send a Pi Zero to the edge of space: log GPS, pressure and temperature, take photos and track it with LoRa until you recover it.
CommanderSolar & Energy
Home Energy Dashboard with Smart Plugs
Find the appliances that cost you the most with certified energy-monitoring plugs and Home Assistant's Energy dashboard.
RecruitEV Charging Log and Cost Dashboard in Home Assistant
Track every kWh your electric car charges at home and what it costs per month — no wiring, just official integrations.
RecruitMeasure Real Power Use with an INA219 Sensor
Log voltage, current and watts of any low-voltage project to find out exactly how long your battery will last.
TechnicianSurvive Power Outages: UPS HAT with Safe Shutdown
Keep your Pi server running through short outages and shut it down cleanly before the battery runs out.
TechnicianRun Appliances When Power Is Cheapest with Home Assistant
Teach Home Assistant your utility's time-of-use hours and let it switch smart plugs on only during cheap periods.
TechnicianOff-Grid Solar-Powered Raspberry Pi
Size a panel, charge controller and LiFePO4 battery to keep a Pi project running 24/7 with no outlet.
EngineerDual-Axis Solar Tracker with Light Sensors
Four light sensors and two servos keep a small solar panel pointed at the Sun all day — then measure how much extra energy you gain.
EngineerBattery Bank State-of-Charge Monitor
Count every amp-hour in and out of a small LiFePO4 battery and show a real percentage instead of guessing from voltage.
EngineerWind Speed and Small Wind Turbine Power Logger
Measure wind with a cup anemometer and the power from a small hobby turbine side by side, and find out if wind makes sense where you live.
Engineer