All About Circuits : Free Electric Circuits Textbooks

Welcome to All About Circuits! This site provides a series of online textbooks covering electricity and electronics. The information provided is great for both ...


  • Managing Technology Overload

    Managing Technology Overload - News 09 Nov '15, 7am

    Technology is everywhere--but humans aren't wired to handle it. There's a fantastic Portlandia skit that demonstrates technological saturation: Fred Armisen’s character logs onto his computer to check his email, then finds himself quickly drowning in texts, software updates, cat video...

  • FSK Explained with Python via @AllAboutCircuit #python

    FSK Explained with Python 01 Sep '15, 2pm

    import numpy as np import pylab as pl import scipy.signal.signaltools as sigtool import scipy.signal as signal from numpy.random import sample #the following variables setup the system Fc = 1000 #simulate a carrier frequency of 1kHz Fbit = 50 #simulated bitrate of data Fdev = 500 #fre...

  • How to Build a Real Time Clock with a PICAXE 03 Oct '15, 6pm

    Adding a real time clock (RTC) circuit and a digital display to a microcontroller to create a functional clock is a favorite undertaking for many electronics DIYers. In fact, an excellent such project using an Arduino was recently published in Jens Christoffersen's article here on AAC...

  • Make an Automatic Water Softener Reporter

    Make an Automatic Water Softener Reporter 07 Nov '15, 5am

    /*user defined settings*/ #define PROX_PIN 24 char ssid[] = "ssid"; //SSID of network char password[] = "password"; //password for wireless network char thing[] = "thing"; //dweet thing int distance_cm_0percent = 15; //distance that you want to show 0% int distance_cm_100percent = 140...

  • Maker Smartwatches More Innovative than Apple’s #WearableTech #Smartwatches

    Maker Smartwatches More Innovative than Apple’s - News 13 Sep '15, 12pm

    This simple but beautiful smartwatch was created by a South Korean startup and allows the visually impaired to feel their texts and even read books through the use of moving dots that form Braille figures. It's currently in the pre-order stage, but will cost less than $300 when availa...

  • Finds IoT Catalyst for ‘Living Services‘” via @allaboutcircuit #Fjord #LivingServices #IoT

    Report Finds IoT Catalyst for “Living Services” - News 18 Jun '15, 9pm

    Accenture's newest report finds that the Internet of Things is enabling advances in "Living Services." The Internet of Things has been revolutionizing the technological world and spurring myriad tantalizing inventions, but a new report by Accenture details the effect IoT will have on ...

  • How to Use an #Arduino as a Web Server

    How to Use an Arduino as a Web Server 07 Jun '15, 2pm

    #include <SPI.h> #include <Ethernet.h> /******************** ETHERNET SETTINGS ********************/ byte mac[] = { 0x90, 0xA2, 0xDA, 0x0D, 0x85, 0xD9 }; //physical mac address byte ip[] = { 192, 168, 0, 112 }; // ip in lan byte subnet[] = { 255, 255, 255, 0 }; //subnet mask byte gate...

  • Volume IV - Digital : Electronics Textbook 08 Sep '14, 9pm

    Chapter 1: Numeration Systems Numbers and symbols Systems of numeration Decimal versus binary numeration Octal and hexadecimal numeration Octal and hexadecimal to decimal conversion Conversion from decimal numeration Chapter 2: Binary Arithmetic Numbers versus numeration Binary additi...

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