Not sure what a word means? Every technical term used across the site is explained here in plain English β and you can hover any underlined term anywhere on Ohmshade for a quick definition.
3MF
A modern 3D-printable file format that carries color, materials, and metadata alongside geometry.
In plain English β A newer, richer 3D-print file format than STL β it can also carry colors and other info, so prints can come out more detailed.
addressable LED
An LED strip where each individual LED can be controlled separately for color and brightness.
In plain English β A light strip where every single light can be its own color β so you can make patterns, rainbows, and animations instead of one flat color.
APDS-9960
A sensor that detects hand gestures, ambient light, and proximity.
In plain English β A chip that can 'see' your hand waving in front of it β used for gesture-controlled lamps and touch-free switches.
Arduino
An open-source electronics platform with simple microcontroller boards.
In plain English β A beginner-friendly electronics board and software for building small gadgets β easier than ESP32 but usually no built-in Wi-Fi.
BH1750
A digital light sensor that measures ambient light level in lux.
In plain English β A sensor that tells your project how bright the room is β used so devices can react to daylight or darkness.
Bluetooth
Short-range wireless communication between devices.
In plain English β The wireless link used by wireless headphones and speakers β connects devices within a few meters, no internet needed.
BME280
A combined sensor measuring temperature, humidity, and barometric pressure.
In plain English β One small sensor chip that measures three things at once β temperature, humidity, and air pressure β used in weather and plant monitors.
BOM
Bill of Materials β the full list of parts needed to build a project.
In plain English β The shopping list of every component, screw, and part required to build a project β your parts checklist.
breadboard
A solderless prototyping board for quickly building and testing circuits.
In plain English β A plastic board with holes that lets you plug parts in to test a circuit without soldering β easy to change and reuse.
Class-D amplifier
An efficient audio amplifier that switches transistors on and off rapidly rather than linearly.
In plain English β A small, power-efficient speaker amplifier β makes audio loud enough for speakers without wasting battery or generating lots of heat.
DS3231
A precision real-time clock (RTC) module with built-in temperature compensation.
In plain English β A very accurate version of an RTC chip β it keeps time precisely even when the temperature changes, so your clock stays spot-on.
e-ink
A ultra-low-power display technology that reflects light like paper and holds an image without power.
In plain English β The screen technology used in e-readers like the Kindle β it looks like real paper, only uses power when the image changes, and stays visible with no battery drain.
ESP32
A low-cost microcontroller with built-in Wi-Fi and Bluetooth.
In plain English β A small, cheap computer chip that can talk to Wi-Fi and Bluetooth β it's the 'brain' inside most Ohmshade smart devices.
ESP32-CAM
An ESP32 variant with an integrated camera module for vision projects.
In plain English β A version of the ESP32 chip with a small camera built in β used for projects that need to see, like security cameras or robots.
filament
The plastic thread melted and extruded by a 3D printer to build objects layer by layer.
In plain English β The plastic 'ink' of a 3D printer β a spool of plastic wire that gets melted and laid down layer by layer to form the part.
firmware
The permanent software programmed into a hardware device that tells it how to operate.
In plain English β The program burned into a gadget that makes it do its thing β like the code that tells your smart clock how to display the time.
GPIO
General-Purpose Input/Output β the configurable pins on a microcontroller.
In plain English β The rows of metal pins on a chip like the ESP32 β each can be set to read a sensor (input) or control something (output).
I2C
A two-wire serial protocol for connecting low-speed peripherals to a microcontroller.
In plain English β A simple wiring standard that lets many sensors share just two wires β keeps the wiring tidy when you have lots of sensors.
LCD
A flat display panel that uses liquid crystals and a backlight to show images.
In plain English β The kind of screen used in calculators and old monitors β it needs a backlight to be visible and is cheaper than OLED.
MAX7219
An LED display driver chip that controls up to 64 LEDs from a few pins.
In plain English β A chip that makes it easy to drive lots of LEDs (like a clock display or matrix) from a microcontroller without a tangle of wires.
microcontroller
A small, low-power computer chip designed to control a single device.
In plain English β A mini computer-on-a-chip that runs one specific job β like reading a sensor and lighting an LED β instead of running lots of programs like your laptop.
MIDI
Musical Instrument Digital Interface β a standard protocol for connecting musical instruments and controllers.
In plain English β The language electronic instruments use to talk to computers and each other β lets a keyboard or controller play software instruments.
MOSFET
A transistor used as an electronic switch to control high-current loads from a low-power signal.
In plain English β An electronic switch β lets a tiny chip like an ESP32 turn on something that needs lots of power (like a long LED strip or a motor) safely.
NFC
Near-Field Communication β very short-range wireless data exchange, the basis of tap-to-pay.
In plain English β A close-up version of RFID β works only when two devices are almost touching, used for contactless payments and smart tags.
OLED
A display technology where each pixel emits its own light β no backlight needed.
In plain English β A crisp, glowing little screen (the kind on smart watches) that makes its own light, so blacks look truly black and it's readable in the dark.
PCB
Printed Circuit Board β the rigid board that holds and connects electronic components.
In plain English β The green (or other colored) board inside electronics with the copper lines that connect all the parts β replaces a tangle of wires.
PIR sensor
Passive Infrared sensor β detects motion by sensing body heat from moving objects.
In plain English β A motion sensor that detects a person (or animal) moving by their body heat β the same kind used in security lights.
PWM
Pulse-Width Modulation β rapidly switching a signal on and off to simulate an analog level.
In plain English β A trick to dim LEDs or control motor speed by turning them on and off super fast so they look dimmer or slower.
Raspberry Pi
A credit-card-sized single-board computer that runs a full operating system.
In plain English β A tiny, affordable full computer (like a mini PC) that runs Linux β used for bigger projects that need a screen, camera, or more processing power.
RC522
A common, low-cost RFID reader/writer module for 13.56 MHz tags.
In plain English β A popular little RFID reader board β the part that actually detects an RFID card when you tap it.
RFID
Radio-Frequency Identification β wireless reading of tags/cards using radio waves.
In plain English β The technology in tap-to-pay and key cards β a reader sends radio waves to a small card or tag to identify it without contact.
rotary encoder
A knob that converts rotation into digital signals β can spin endlessly and report direction.
In plain English β A turning knob (like a volume dial) that tells the device which way and how far you've turned it β used for menus and volume controls.
RTC
Real-Time Clock β a chip that keeps accurate time even when the main device is off.
In plain English β A tiny clock chip with its own battery that remembers the time and date even when your project is unplugged β so it doesn't lose the time after a power cut.
servo
A small motor that can be commanded to move to a specific angle, not just spin.
In plain English β A tiny motor that moves to an exact position you tell it β used to open locks, point cameras, or move small mechanisms.
SK6812
An addressable RGB LED similar to WS2812B, often with a separate white channel.
In plain English β A close cousin of the WS2812B LED strip β same idea (control each light individually), sometimes with an extra true-white light for cleaner whites.
soldering
The process of joining electronic components with molten metal solder for a permanent connection.
In plain English β Melting a metal alloy to permanently glue electronic parts together electrically β the core skill of electronics assembly.
solenoid
An electromagnetic actuator that pushes or pulls a pin when powered.
In plain English β An electronic plunger β when you power it, a metal pin shoots out or pulls back, used for locks and latches.
SPI
A fast, synchronous serial protocol for short-distance communication between chips.
In plain English β A faster wiring standard than I2C β used when a device (like a display) needs to move a lot of data quickly.
STL
A standard 3D-printable file format describing an object's surface as triangles.
In plain English β The file type you send to a 3D printer β it describes the shape of the object so the printer knows what to build.
UART
A simple serial communication protocol using separate transmit and receive lines.
In plain English β The classic 'serial port' way two chips talk to each other β one wire to send, one to receive.
Wi-Fi
Wireless networking technology connecting devices to a local network and the internet.
In plain English β The wireless internet connection your phone and laptop use β lets smart devices talk to your home network and the web.
WS2812B
A popular type of addressable RGB LED where each LED is individually controllable.
In plain English β A kind of LED light strip where you can set the color of every single light separately β used for fancy color effects and displays.