AutomationAutomatic Water Dispenser
Build a touchless dispenser that detects a hand and switches on a water pump automatically.
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Build the projects, step by step
These ten MakerBuddy projects include complete instructions on Hackster.io. Start with one, understand how its sensors and actions work, then remix it into something new.
Automation
RoboticsSmart Car Parking Garage
Detect an approaching car, open the garage door with a servo, and signal when entry is clear.
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Smart HomeSmart Automatic Clothesline
Use a moisture sensor and servo to move model clothes into shelter when rain is detected.
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AutomationSmart Automatic Door
Sense an approaching object with an ultrasonic sensor and open a model door automatically.
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SustainabilityWet & Dry Smart Dustbin
Combine distance and moisture readings to sort wet and dry waste into separate bins.
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MeasurementDIY Vernier Caliper
Turn an HC-SR04 and 16×2 LCD into a digital measuring tool with live distance readings.
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Smart HomeSmart Touchless Dustbin
Use an ultrasonic sensor and servo motor to open a model dustbin without touching it.
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RoboticsSmart Pet Feeder
Detect a nearby pet with a PIR sensor and use a servo to dispense a measured portion of food.
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Creative STEMAutomatic Pakistan Flag Waver
Combine a servo, RGB lighting and an LCD to create an interactive Independence Day display.
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MeasurementDIY Analog Temperature Gauge
Map DS18B20 temperature readings to a servo-driven dial for an easy-to-read physical display.
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Find the right next build
Choose a theme, then scan the hardware tags to find a project that matches the parts and skills you want to practise.
- Project ideas
- 50
- Themes
- 6
Start here
Beginner projects
Fast, confidence-building experiments with one clear input and output.
01
Smart Night Light
Read the light sensor and switch on the onboard LED when the room falls below a chosen threshold. Compare several thresholds and explain why the best value depends on the environment.
Light sensorLED
02
Doorbell System
Wire the push button as a doorbell trigger and sound the buzzer with a short pattern so it is easy to tell apart from other alerts.
Push buttonBuzzer
03
Distance Warning
Use the HC-SR04 to sound a warning as an object gets closer, with distinct tones for "caution" and "too close."
HC-SR04Buzzer
04
Digital Thermometer
Display live DHT11 temperature on the dashboard and log readings across a day to spot patterns caused by sunlight or ventilation.
DHT11Dashboard
05
Potentiometer Dimmer
Map a potentiometer's analog range to LED brightness and describe how PWM produces the dimming effect.
PotentiometerLED
06
Color Mixer
Adjust red, green and blue channels on the RGB LED to create colors, exploring additive color mixing and saving a palette for later use.
RGB LED
07
Servo Wiper
Sweep a servo back and forth like a windshield wiper and adjust speed and range through the dashboard.
ServoDashboard
08
Pedestrian Light
Build a simple traffic-light sequence with timed red, yellow and green phases using the LED and RGB outputs.
RGB LED
09
Motion Alarm
Trigger the buzzer and an LED flash whenever the PIR sensor detects movement in a room.
PIRLEDBuzzer
10
Reaction Timer
Use an LED as the signal and the push button as the response, measuring how consistently a player can react and discussing input debouncing.
Push buttonLED
Useful systems
Smart home projects
Turn sensor readings into practical actions for everyday spaces.
11
Auto-Fan Controller
Read temperature from the DHT11 and drive a relay-controlled fan once the room crosses a comfort threshold.
DHT11Relay
12
Smart Lamp Control
Combine the light sensor and dashboard toggle so a lamp turns on automatically at dusk or on demand.
Light sensorDashboard
13
Kitchen Safety Monitor
Watch the MQ-2 gas sensor for smoke or gas buildup and raise a tiered alert as levels climb.
MQ-2
14
Garden Auto-Waterer
Monitor a capacitive soil moisture sensor and trigger a relay-driven pump or valve when the soil gets too dry.
Soil sensorRelay
15
Intruder Alert
Pair the PIR sensor with the buzzer and LCD to log the time of each detected entry.
PIRBuzzerLCD
16
Privacy Status
Use a switch or button to show a "do not disturb" state on the LCD and RGB LED, useful for shared rooms or calls.
RGB LEDLCD
17
Wake-Up Light
Fade the RGB LED from dark to bright over a set period to simulate a sunrise-style alarm.
RGB LED
18
Garage Park Assist
Use the HC-SR04 to guide a car into the exact same parking spot every time with LED distance zones.
HC-SR04LED
19
Temp Data Logger
Record DHT11 readings on an interval and review the resulting trend on the dashboard.
DHT11Dashboard
20
Visitor Counter
Use the PIR sensor to increment and display a running visitor count on the LCD.
PIRLCD
Connected builds
Web & IoT projects
Bring controls, live readings and events into the browser.
21
Phone Light Switch
Control the onboard LED or a relay from a phone browser over the local dashboard, no app install required.
LEDRelayDashboard
22
Global Weather Station
Display live DHT11 values on the dashboard and compare local readings against an outside reference.
DHT11Dashboard
23
Remote Pet Feeder
Trigger a servo-driven hatch from the dashboard to dispense food on a schedule or on demand.
ServoDashboard
24
Security Email Alert
Fire a PIR-triggered notification workflow and document how the WebSocket event reaches an external service.
PIRWebSocket
25
IoT Mood Lighting
Drive the RGB LED from dashboard presets or automation rules tied to time of day.
RGB LEDDashboard
26
Door Status Checker
Use a reed switch or PIR placement to report whether a door is open or closed on the dashboard.
PIRDashboard
27
Silent Notifier
Replace the buzzer with an LED flash pattern for notifications in sound-sensitive spaces.
LEDBuzzer
28
Baby Room Monitor
Combine DHT11 and PIR readings into a single dashboard view for temperature and movement in a nursery.
DHT11PIRDashboard
29
Gas Leak Dashboard
Stream MQ-2 readings to the dashboard with a clear safe/warning/danger visual state.
MQ-2Dashboard
30
Holiday Light Show
Sequence the RGB LED and relay outputs into a timed show, controllable from the dashboard.
RGB LEDRelayDashboard
Investigate
Science & eco projects
Collect evidence, compare results and explain what the data means.
31
Plant Thirst Tracker
Monitor a capacitive soil moisture sensor and show a visual or audible alert when the reading drops below a calibrated level.
Soil sensorBuzzer
32
Air Quality Lab
Compare MQ-2 readings across rooms or times of day and discuss the limits of low-cost gas sensing.
MQ-2
33
Insulation Tester
Track how quickly a small enclosure's DHT11 reading returns to ambient temperature to compare insulating materials.
DHT11
34
Shadow Detector
Use the LDR to detect passing shadows and count them as a simple light-based sensor exercise.
Light sensor
35
Human Reflex Test
Measure button-press reaction time against a randomized LED cue and log results across several trials.
LED
36
Conductivity Lab
Use analog input readings to compare how different materials or liquids affect a simple conductivity probe.
37
Digital Height Measure
Use the HC-SR04 as a downward-facing rangefinder to estimate height or fill level.
HC-SR04
38
Room Mapping
Sweep the HC-SR04 with a servo to build a simple distance map of a room.
HC-SR04Servo
39
Dew Point Calc
Use DHT11 temperature and humidity together to estimate dew point and explain the calculation.
DHT11
40
Compost Monitor
Track temperature and moisture together to identify when a compost pile needs turning or water.
Play and create
Fun & games projects
Use the same electronics to make games, instruments and playful interactions.
41
LCD Fortune Teller
Show randomized fortunes on the LCD triggered by a button press.
Push buttonLCD
42
Memory Game
Flash a sequence on the RGB LED and buzzer, then require the player to repeat it with the push button.
Push buttonRGB LEDBuzzer
43
Distance Theremin
Map HC-SR04 distance readings to buzzer pitch to play a touchless instrument.
HC-SR04Buzzer
44
Reflex Duel
Add a second button for a two-player reaction game, with the LCD announcing the winner.
Push buttonLCD
45
Digital Pet
Use the LCD, buzzer and PIR sensor to create a simple virtual pet that reacts to attention and neglect.
PIRBuzzerLCD
46
Safe Cracker
Use the potentiometer as a dial and the LCD as feedback to build a combination-lock guessing game.
PotentiometerLCD
47
Hot Potato
Pass a "hot" state between players using a button, with a random buzzer countdown ending the round.
Buzzer
48
Lie Detector
Use analog skin-response-style wiring on an input pin paired with the buzzer for a lighthearted lie-detector demo.
Buzzer
49
Precision Servos
Practice precise angle control by having a servo trace a sequence of positions on command.
Servo
Combine systems
Security project
Layer multiple inputs and outputs into a more capable final challenge.
50
Shadow Alarm
Combine the LDR and PIR sensor so a break in the light pattern or unexpected motion triggers an alert on the buzzer, LED and LCD.
PIRLight sensorLED
Before you build
Turn an idea into a clear project brief
A few decisions up front make testing easier and give learners a stronger story to share.
- 1The problem and intended user
- 2Inputs the system can observe
- 3Decisions or thresholds it applies
- 4Outputs or actions it controls
- 5Safety and privacy considerations
- 6A test plan and success criteria
- 7Evidence, limitations and next steps