AM Diode Envelope Detector / Demodulator
Find out how the envelope diode detector works in detecting or demodulating amplitude modulated signals.
Radio & electronics tutorials and notes covering basic concepts, components, radio technology, constructional techniques, ham radio, & electronics history…
Electronics Notes is written and run by Ian Poole
Light Dependent Resistor LDR or Photoresistor
Light dependent resistors, LDRs or photoresists are used to detect light. Their resistance changes significantly when they are exposed to light enabling them to be used in a variety of circuits.
Electronics Notes Videos
What is VSWR: There are many myths and misunderstandings relating to standing wave ratio. Understand what is really happening . . .
Read more . . .
What's on ElectronicsNotes:
Buying Guides
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When looking to buy electronic gadgets, equipment, or even components, it helps to know what to look for. Check out our informed buying guides to make sure you buy the right item.
Testing & Test Equipment
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All aspects electronics testing, test methods, and test equipment including oscilloscopes, test meters, spectrum analyzers and all forms of test equipment.
Electronic components
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Electronics Notes provides tutorials and information on many electronic components found in electronic circuits ranging from resistors and capacitors through simple semiconductors to complete integrated circuits. Introductions to in-depth information.
Construction
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Whether at home or for a large manufacturing organisation with PCB assembly, etc, one of the key challenges is in building or manufacturing the electronic circuits.
Basic concepts
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Learn about the basic electronics concepts including voltage, current, resistance and many basic calculations.
Radio
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Radio technology is being used increasingly within everyday life. From broadcast radio and cellular phones to Wi-Fi and other wireless technologies it is widely used. Find out all you need to learn about radio and radio circuits on Electronics Notes.
Circuits & circuit design
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Circuits and circuit design techniques for everthing from bipolar transistors and FETs to operational amplifiers, power supplies and much more.
Connectivity
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Connectivity both wired and wireless is an essential part of life today. Broadband, Wi-Fi, Bluetooth, mobile communications and many more forms of communication are all widely used.
Ham radio
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Electronics Notes provides the tutorials and the basic information you need to know to get started and learn about the fascinating hobby of amateur radio from operating, Morse code and DXing through to summaries of the ham radio allocations.
Audio Visual
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This section of Electronics Notes gives descriptions, summaries and tutorials about AV, Audio Visual topics from television to Hi-Fi and systems and from the interface standards like SCART, HDMI and the like to descriptions of loudspeakers, etc..
Antennas and propagation
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Learn about antennas with our detailed notes, descriptions, summaries of antennas, what they are, how they work, antenna designs and also radio propagation - how radio signals travel.
Jobs & Careers
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Career and job information for those interested in becoming an electronics engineer. Everything from what an electronics engineer may do, through to applying for a job, writing a CV and much more.
History More
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Morse Telegraph History
Morse keys, the Morse Code and the associated Morse telegraph system revolutionised communications and enabled messages to be sent almost anywhere very quickly. -
Alessandro Volta
Pioneer of electrical science who gave his name to the Volt.
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Andre-Marie Ampere
The man who gave his name to the Amp, the unit of electrical current.
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Thomas Alva Edison
The man, his inventions, and his invention factory.
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Michael Faraday
The Father of Electrical Engineering
