How Does a Transistor Work
Bipolar transistors form the basis of a huge amount of today's electronics technology - find out how they work and learn about all the technology behind them.
Clear summaries & information about electronics, radio and connectivity
from electronics engineer, Ian Poole.
from electronics engineer, Ian Poole.
Thank you for visiting Electronics Notes. On the site I aim to provide accessible summaries, and information with a minimum of jargon covering many electronics engineering topics. All the topics are manually written by myself and the aim is to provide useful information that is easy to understand and to include many hints, tips & practical guidance notes using my experience from my many years as an electronics engineer.
Electronics Notes is written and run by Ian Poole
I've just launched a new section on the website which provides data for various components. There is the component data along with distributor stock levels and links to their sites. I'll be considerably expanding this over the coming weeks and months. Check it out and keep visiting!
Choosing the Best Flash Memory Card
Our useful guide gives the essential information that reveals what the different codes, specifications and markings mean so that you can select the right memory card for your needs.
Amplitude Modulation Primer
Amplitude modulation is used for long, medium and short wave broadcasting, and it forms a key element in other modulation schemes including SSB & QAM. Find out all you need to know
Today's Selected Videos
Latest Videos
Video: Why Metal Film Resistors Have Inductance
Video: Transistor Common Base Amplifier 101
I've recently been developing an Amazon.com Storefront to complement the pages on the website. Although I gain a commission that helps keep the website going, there is no additional cost to you. Check it out regularly as I'm always updating it. See more . . .
Latest Content
Understanding Ultra-wideband-UWB: a basic 101 introduction:
Ultra-wideband, UWB has been in existence for many years, but it is now coming to the fore to be used in many types of application including automotive technology and other areas where proximity sensing is needed.
Read more . . . . .
Active vs. Passive RF Mixers - Weighing the Trade-offs in Frequency Conversion:
One of the main choices to make when selecting an RF mixer (frequency mixer) for a design is whether to use an active or passive type: I look at the differences, their advantages & disadvantages.
Read more . . . . .
Microprocessor vs Microcontroller - what are the differences:
Microprocessors and micrcontrollers are both forms of processor unit, but what are the differences, advantages, disadvantages & where are each type used.
Read more . . . . .
Battery Corrosion: The Silent Enemy of Electrical Performance:
Corrosion associated with all forms of batteries can destroy not only the battery, but also the equipment around it, so its important to understand how it occurs, how to precent it, and perform remedial action when it has happened.
Read more . . . . .
Cost Effective Online Training
We've partnered with some top training provides to offer you a great choice of training options wherever you may be. See more . . .
What's on ElectronicsNotes:
There is a huge variety of information on ElectronicsNotes ranging from the basic concepts through to 5G and more. Everything from electronic components, circuit designs, connectivity with everything from wired technologies like Ethernet, RS2432 and more to wireless technologies including mobile communications, Wi-Fi, IoT communications as well as radio and RF design antennas, and a host of other topics.
Find out all the information you need to know using our easily understood explanations.
Antennas & propagation
Antenna types, feeders & radio propagation
Audio-visual
Loudspeakers, microphones, HDMI, SCART, & much more
Basic concepts
Resistance, Ohm's law, capacitance to more advanced topics
Careers
Career advice, interviews, & becoming an engineer
Circuit Design
Circuits and their circuit design methodologies & details
Components
Electronic components including passive, active & ICs, etc
Connectivity
All forms of wired & wireless communications
Construction & manufacturing
Soldering (manual & automated) assembly,ESD precautions, etc
Eco / Green Engineering
Energy saving, green energy, green electronics
Radio & RF
Modulation, RF building blocks mixing, hybrids & more
Satellites
Satellites & satellite technology
Test Methods
Test equipment, technologies & test methods
Electronic engineering can make a great career providing interest, challenges and good prospects
Read more . . .
Technology history
Discover some of the stories that detail how the foundations were set in place for today's technology.
We have a large number of pages devoted to pioneers, how technology was invented and developed as well as descriptions of many types of radio receiver, etc, etc.
Morse Key Development
A history of the developments made to the Morse key from the earliest Correspondent key made by Alfred Vail through the Camelback, Steel lever Key, military keys to the semi-automatic and fully automatic bug keys.
Electronics Notes aims to provide accessible summaries about a host of electronics, radio and connectivity technologies in a practical and useful way.
Our aim is to support those who want to learn about the technology: those who are established engineers as well as students and hobbyists.
The topics included in the site range from the basic electronics concepts (useful for established engineers as well looking for those equations, formulas etc, including topics like basic electronics concepts, component descriptions and explanations, circuit designs and circuit design principals, manufacturing techniques, radio technology & RF design and wired and wireless connectivity and a host of other topics.
To fund the running of the site, we obviously need to carry advertising, but we aim to make this not too intrusive. We hope you understand, but we need to have income to meet the not inconsiderable running costs.
