Trigger a Fog Machine with a PIR Sensor and Relay
Build a Halloween motion trigger on an Arduino Uno: a PIR sensor fires a relay for a short burst, then ready and cooldown LEDs show when it can fire again.
Posts tagged “arduino”
News from the workbench: what we shipped, how it works and guides for building with it. Follow by RSS or see every update.
Hand Out a Circuit and Collect Student Work Online
A teacher guide to Mokxi classes: hand out a locked starter circuit, collect submissions, see what changed and auto-check an LED and button project.
Build a Grabbing Candy Bowl with an Ultrasonic Sensor
Build a Halloween candy bowl in Mokxi that grabs back: an HC-SR04 spots a hand, a servo swings down, a piezo shrieks, and a cooldown resets it.
analogWrite Will Not Fade? The Pin May Have No PWM
Your Arduino Uno LED jumps on instead of fading? See why analogWrite needs a PWM pin, which Uno pins have it, and how Mokxi's Circuit Doctor flags it.
Add an Arduino Library in Mokxi with Library Manager
Search the Arduino Library Manager inside the Mokxi editor, install a library and its dependencies in one tap, or upload your own, on the Free plan.
Make a Haunted Window with NeoPixels and a Knob
Build a Halloween haunted window on an Arduino Uno: a NeoPixel strip throws lightning, four LEDs flicker like candles and a knob sets the storm.
Print Text on a 16x2 I2C LCD with Arduino Uno
Wire a 16x2 I2C LCD to an Arduino Uno in Mokxi, then scroll a message, show an uptime clock and draw custom characters, step by step.
Moving from Tinkercad Circuits to Real Arduino Code
A plain guide for Tinkercad Circuits users: write real Arduino C++ for an Uno, an LED and a button in Mokxi, use the serial monitor and save your work.
Light a NeoPixel Strip with a Rainbow on Arduino Uno
Wire a WS2812 NeoPixel strip to an Arduino Uno and animate a rolling rainbow with the Adafruit NeoPixel library, in your browser with Mokxi.
Circuit Doctor Catches an LED With No Resistor
Build an Arduino Uno LED circuit with no resistor, watch Mokxi's Circuit Doctor flag it in plain words, then fix it with one tap.