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TinyCAD is an open source schematic capture program. Use TinyCAD to draw your own circuit diagrams. http://tinycad.sourceforge.net

Arduino is an open-source physical computing platform based on a simple i/o
board and a development environment that implements the Processing/Wiring
language. Arduino can be used to develop stand-alone interactive objects or
can be connected to software on your computer (e.g. Flash, Processing, MaxMSP).
The boards can be assembled by hand or purchased preassembled; the open-source
IDE can be downloaded for free. For more information, see the website at: http://www.arduino.cc/ or the forums at: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl

Serialterm: this is a command line serial terminal http://www.comp.lancs.ac.uk/~albrecht/ With this program, you can for instance capture data from various sensors with an Arduino USB board.

LTspice IV is intended to be used as a general purpose schematic capture program with an integrated SPICE simulator. The idea is you draw a circuit(or start with an example circuit that’s already drafted) and observe its operation in the simulator. http://www.linear.com

The ebook FEEE – Fundamentals of Electrical Engineering and Electronics http://www.vias.org/feee/bin/feee.zip

Electronics Assistant is a small program designed to perform basic electronics-related calculations. It includes a resistor colour code calculator, resistor, capacitor and potential divider calculators and more. http://www.electronics2000.co.uk

Talking Electronics – Huge resources tutorials, circuits http://www.talkingelectronics.com

Circuits http://www.next.gr

Circuits http://www.freecircuitdiagram.com

IC references http://www.datasheetcatalog.com

Find IC equivalences and references http://www.abcelectronique.com

Williamson-labs – Tutorials, electronics made easy http://www.williamson-labs.com

TCI (Drawing of Printed Circuits) : this software is intended to draw printed circuits manually, to print them on paper. http://b.urbani.free.fr

TinyCircuits is an Open Source Hardware company specializing in designing and manufacturing very small (Tiny) electronics.
http://tiny-circuits.com

Datasheets360 – Electronic Component Search | Datasheet and Supplier Information :
http://www.datasheets360.com

PartSim is an online Circuit Simulator with SPICE | PartSim :
http://www.partsim.com/simulator

ECA : We are the world’s leading publisher of data and equivalent tables of all types of semiconductors. Without our products as books, software on DVD / CD or on the Internet at www.ecadata.de no electronic engineer is now able to work intelligently and rationally : http://www.eca.de/index.php?newlang=eng

Conrad is an online store specialized in electronic supplies : http://www.conrad.com

Lextronic is your partnership for your electronic solutions since 1969 : http://www.lextronic.fr

Electronics Ideas and Projects Around the Globe : http://creation-electronics.blogspot.com

Elektor promotes passion for electronics and sells books, cd/dvd, magazines : http://www.elektor.com

RobotShop sells products for robotics : http://www.robotshop.com

http://www.diakin.narod.ru/

https://www.allaboutcircuits.com/ The fastest growing community of electrical engineers with 300+ new members every day seeking technical articles, advanced education, tools, and peer-to-peer discussions.

Great Cow Basic –  The  Great Cow BASIC suite is robust and fully functional compiler and assembler.   Using Great Cow BASIC is the fastest method to program a Microchip PIC or Atmel AVR 8-bit microcontroller for those just starting and the professional user.
http://gcbasic.sourceforge.net/Typesetter/index.php/Home

The Atomic Pi features an Intel Atom x5-Z8350, a quad-core SoC designed for Windows tablets. This is a three-year-old chip clocked at 1.44 GHz (base, up to 1.92 GHz) with 2 GB of RAM
It is a cheap but interesting Intel x86 small computer.

The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It is a capable little device that enables people of all ages to explore computing, and to learn how to program in languages like Scratch and Python.

https://www.bidouilleur.ca/
Chaîne YouTube de Bidouillage en Électronique