# A Symbolic Analysis of Relay and Switching Circuits

"A Symbolic Analysis of Relay and Switching Circuits" is the title of a master's thesis written by computer science pioneer Claude E. Shannon while attending the Massachusetts Institute of Technology (MIT) in 1937. In his thesis, Shannon, a dual degree graduate of the University of Michigan, proved that Boolean algebra could be used to simplify the arrangement of the relays that were the building blocks of the electromechanical automatic telephone exchanges of the day. Shannon went on to prove that it should also be possible to use arrangements of relays to solve Boolean algebra problems. The utilization of the binary properties of electrical switches to perform logic functions is the basic concept that underlies all electronic digital computer designs. Shannon's thesis became the foundation of practical digital circuit design when it became widely known among the electrical engineering community during and after World War II. At the time, the methods employed to design logic circuits were ad hoc in nature and lacked the theoretical discipline that Shannon's paper supplied to later projects. Psychologist Howard Gardner described Shannon's thesis as "possibly the most important, and also the most famous, master's thesis of the century". A version of the paper was published in the 1938 issue of the Transactions of the American Institute of Electrical Engineers, and in 1940, it earned Shannon the Alfred Noble American Institute of American Engineers Award. (Wikipedia).

Relay Calculators: Episode 3 - Relay Logic Gates, Latches and Delays

In this video I go into detail about how to make all the logic gates using relays as well as the type of latches and delays I used for the sequencer and registers. https://en.wikipedia.org/wiki/Logic_gates http://www.relaiscomputer.nl/

From playlist Relays

Notation and Basic Signal Properties

http://AllSignalProcessing.com for free e-book on frequency relationships and more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Signals as functions, discrete- and continuous-time signals, sampling, images, periodic signals, displayi

From playlist Introduction and Background

George Labahn 3/10/16 Part 2

Title: Symbolic-Numeric Computation with Rational Functions Symbolic-Numeric Computing Seminar

From playlist Symbolic-Numeric Computing Seminar

Diode graphical solution

Keep going! Check out the next lesson and practice what you’re learning: https://www.khanacademy.org/science/electrical-engineering/ee-semiconductor-devices/ee-diode/a/ee-diode-circuit-element We solve a diode circuit graphically by plotting a diode i-v curve and resistor to find the inte

From playlist Electrical engineering

Logic Gate Combinations

This computer science video follows on from the video that introduces logic gates. It covers creating truth tables for combinations of simple logic gates, including a mention of some well used combinations. Combinations of logic gates manipulate pulses of electricity, and because these pu

From playlist Logic Gates

National 5 Physics Live: Electricity and energy part 1

National 5 Physics 'Electricity and energy' unit - in this live session, I go over the first half of the National 5 Physics 'Electricity and energy' unit. Topics covered - circuit symbols, placement of ammeters & voltmeters, resistors in parallel, potential dividers and transistor switchin

From playlist National 5 LIVE lessons

Tutorial: How to design a transistor circuit that controls low-power devices

I describe how to design a simple transistor circuit that will allow microcontrollers or other small signal sources to control low-power actuators such as solenoid valves, motors, etc.

From playlist Electronics

Introduction to Linear Time Invariant System Descriptions

http://AllSignalProcessing.com for free e-book on frequency relationships and more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Introduces systems and their use in signal processing; defines linearity, time invariance, and causal sys

From playlist Introduction and Background

Making Intelligence with Basic Switch

Intelligence and Consciousness is made of simple switches, let’s make logic with relays! AND Get your first month of KiwiCo FREE at https://kiwico.com/ElectroBOOM Seems you guys were interested in my bread board power supply, here a link to their website: https://www.eimtechnology.com/ Th

From playlist Electronics

Computer Pioneers: Pioneer Computers Part 1

[Recorded: 1996] Part 1 of 2 The Dawn of Electronic Computing 1935 1945 Computer pioneer Gordon Bell hosts this two-part program on the evolution of electronic computing from its pre-World War II origins through the development of the first commercial computers. His narration traces the

From playlist Early Vacuum Tube Computers - 1940's and 1950's.

Relay Calculators: Episode 7 - Designing Two New Boards

In this video I go through the process of designing an LED diagnostic board and a zeroing board for the Hexadecimal Relay Calculator. The software I used for the circuit design is DesignSpark PCB:https://www.rs-online.com/designspark/pcb-software

From playlist Relays

Discrete Structures: Boolean Algebra

An introduction to Boolean algebra, including simplification, properties of Boolean algebra, and proofs.

From playlist Discrete Structures, Spring 2022

Logic gates: GCSE revision

GCSE level covering: logic gates, silicon, doped, NPN, diode, transistor, switch, thermistor, And Gate, not gate, or Gate, nand gate, nor gate, warning system, relay

From playlist GCSE Physics Revision

EEVblog 1481 - Dodgy Dangerous Heater REPAIR

A heater that doesn't heat up should be an easy and quick repair, right? RIGHT? This Arlec space heater also has a rather dodgy and product recall worthy dangerous construction! Part 2 looking at the mains Zener regulator circuit : https://www.youtube.com/watch?v=vJ4pW6LKJWU 00:00 - Arle

From playlist Repairs

Verification of Measurement-Based Quantum Computation - M. Hayashi - Main Conference - CEB T3 2017

Masahito Hayashi (Nagoya) / 14.12.2017 Title: Verification of Measurement-Based Quantum Computation Abstract: Quantum computation offers a novel way of processing information and promises solution of some classically intractable problems. However, if the component of the quantum com

EEVblog 1482 - Mains Capacitor Zener Regulator Circuit

A follow up to the previous video on repairing the heater. A viewer asked how the capacitor diode rectifier gave a 24V output. The key is in the zener regulator, so this vidoe looks at how mains powered zener voltage regulators work, and their limitations. X class capacitor and self healin

From playlist Electronics Tutorials

Inductor kickback 2 of 2

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/electrical-engineering/ee-circuit-analysis-topic/ee-natural-and-forced-response/v/ee-inductor-kickback-2 We give the inductor's kickback current a path to flow

From playlist Electrical engineering

EEVblog #275 - PIR Sensor Teardown & Tutorial

http://www.perkinelmer.co.uk/CMSResources/Images/44-4345CAT_SensorsAndEmittersInfraredSensing.pdf Teardown Tuesday What's inside a NESS Quantum Passive Infrared (PIR) pyroelectric motion sensor. How do they work? And what's all this Fresnel lens stuff anyhow?

From playlist Electronics Teardowns