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84 GUIDES | 530 PAGES | 1 FEATURED | 13 POPULAR

Automate liquid reagent dosing using reef-pi
reef-pi Guide 7: Dosing Controller
by Ranjib Dey
Learn to use potentiometers (variable resistors) in your projects.
Make It Change: Potentiometers
by Mike Barela
A practical guide to transistors and their use
Transistors 101
by Dave Astels
When your microcontroller needs to accurately read if a switch is flipped
Make It Switch
by Mike Barela
How to use a rotary encoder in your CircuitPython projects!
Rotary Encoder in CircuitPython
by Kattni Rembor
Inside the ATMega328: a guided tour of a classic Microcontroller
Digital Circuits 7: MCUs... how do they work?
by Dave Astels
In this guide, we design and build a ROM emulator
Digital Circuits 6: An EPROM Emulator
by Dave Astels
There are 2 types of memories: those you remember and those you don't.
Digital Circuits 5: Memories
by Dave Astels
Circuits that operate over time.
Digital Circuits 4: Sequential Circuits
by Dave Astels
Putting logic gates together
Digital Circuits 3: Combinational Circuits
by Dave Astels
Tools for working with digital circuits.
Digital Circuits 2: Some Tools
by Dave Astels
Binary numbers, Boolean logic, and logic gates.
Digital Circuits 1: Binary, Boolean, and Logic
by Dave Astels
Everything you need to know to use 555 timer chip.
Getting to know the 555
by Dave Astels
Build a full-scale arcade controller for your pocket-scale Arduboy!
Arduboy Game Controller Hack
by John Park
Stream Airtunes to Boomy!
Boomy Pi Airplay Boombox
by Ruiz Brothers
Removes those pesky fumes whenever you reach for the iron
Motion-Activated Solder Fume Extractor With Lamp
by Jan Goolsbey
I2C addresses from 0x00 to 0x7F (inclusive)
I2C addresses!
by lady ada
Make a pinball controller for your iOS device using Teensy
Pinball Controller for iPad
by John Park
Do you know how fast you were going?
Pro Trinket Tachometer
by Bill Earl
they're a dime a dozen. Lets use them!
Programming SPI flash with an FT232H breakout
by Dean Miller
How to make a slide switch JST-PH adapter!
DIY On/Off JST Switch Adapter
by Ruiz Brothers
Level shifters are like little bilingual translators for your electronics!
Level Shifting 3.3V microcontrollers and NeoPixels
by John Park
Explore reading analog signals with the Circuit Playground.
Circuit Playground Analog Input
by Carter Nelson
Make a Simple JTAG Debugging FeatherWing for the M0
Debug Header for the Feather [M0]
by Michael Sklar