Builds that do something on the first evening, not blink an LED. Wiring checked against the app's audited module data, the full sketch, and a parts list with no libraries you have to hunt for.
Wiring table, the complete sketch, and a circuit you can simulate in your browser before buying a part.
Same audited wiring, sketches and parts lists — offline on your phone, no write-up on this site.
A hallway light that comes on only when it is both dark and someone is moving, fades in instead of snapping on, and holds for 30 seconds after the last movement.
Temperature and humidity on an OLED, with a 16-minute trend graph and a min/max record — so you can see the room warm up, not just what it is right now.
Soil moisture as a real percentage on a 4-digit display — with a two-point calibration you run yourself and that survives a power cut, because an uncalibrated soil sensor reads a number that means nothing.
A spirit level whose bubble moves like the real one, with the number the glass vial can never give you — and a zero button, so it measures against the shelf you are standing on rather than against gravity.
An MQ-2 alarm that measures the room it is actually in before it decides what counts as smoke — because the sensor reports 'more than before', never ppm, and every room's 'before' is different.
A servo sweeps the ultrasonic sensor while each reading is plotted as a blip on the OLED, sweep line and all. The one that makes people stop and watch.
These are the same projects the Robot Maker Toolkit app ships. The wiring and sketches on this site are generated from the app's own files and verified against them on every build, so a page here can't quietly disagree with what the app tells you to wire.
All 7 projects work offline in the app, alongside 55+ sensor wiring diagrams, 10 board pinouts, shield maps and maker calculators.
Get it onGoogle Play