XOR gate explained: build a half adder with a 74HC86 and a 74HC08
Learn how an XOR gate works, then wire a 74HC86 and a 74HC08 in your browser to make a half adder that adds two bits and shows the carry.
Posts tagged “tutorials”
News from the workbench: what we shipped, how it works and guides for building with it. Follow by RSS or see every update.
Make an advent calendar with an Arduino, an OLED and one button
Build a 24-door advent calendar on a 0.96 inch OLED. One button opens the next door, with a progress bar. Full Arduino code you can run in Mokxi.
NOR gate and the 74HC02: a beginner's guide, with one wiring trap to avoid
Learn how a NOR gate works, wire a 74HC02 in your browser (its pinout is not the 74HC00's), and build NOT, OR, AND and a latch from NORs.
NAND gate tutorial for beginners: build every other gate from a 74HC00
Learn the NAND gate truth table, wire a 74HC00 in your browser, then build NOT, AND, OR and XOR gates out of NANDs alone.
Work Through Starter Kit Projects in Your Browser
Follow Arduino starter kit projects in Mokxi without any parts: how the kit companion pages and lessons work, with a starship control panel to build.
Read a DHT22 on an ESP32-C3 and Print to Serial
Wire a DHT22 to an ESP32-C3 in Mokxi, pick a safe GPIO, power it from 3.3 V and print temperature and humidity to the serial monitor at 115200 baud.
Flickering Jack-o-Lantern Light on an ESP32-C3
Make one NeoPixel flicker like a candle inside a jack-o-lantern with an ESP32-C3 sketch, random brightness and smoothing, running in your browser.
Make a Porch Light That Turns On at Dusk
Build a dusk light in Mokxi with a photoresistor sensor and an Arduino Uno, and use hysteresis so the lamp does not flicker as the light fades.
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.
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.