Carbon Composition Resistor
The carbon composition resistor was widely used for many years, but since the 1960s it has been superseded by other types with better performance although it is used in some specialised applications.
Clear summaries & information about electronics, radio and connectivity
from electronics engineer, Ian Poole.
from electronics engineer, Ian Poole.
Thank you for visiting Electronics Notes. I'm aiming to make this a quality resource centre for electronics engineers at all levels from hobbyists to professionals. With the website, videos, social media and my online shop, I aim to provide accessible information for free or for a low cost (the site and everything else have some significant running costs).
Electronics Notes is written and run by Ian Poole
The Electronics Notes online shop offers an increasing number of downloadable resources, ebooks, guides, crib sheets (cheat sheets) and infographics as well as coffee mugs, apparel and more. Check it out now!
Doherty Amplifier Concept
The Doherty amplifier is a form of power amplifier that provides increased efficiency levels when used with signals that have a high peak to average power ratio. Find out more . .
Free Space Propagation
When radio waves are transmitted they travel away from the transmitter. The way they travel or propagate in free space forms the basis of many of our calculations and concepts.
Today's Selected Videos
Latest Videos
Video: Why are Silicon CARBIDE Schottky diodes so great?
Video: How to Clear Battery Residue at Home in Easy Steps
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
Quartz Crystal Load Capacitance Calculation:
The load capacitance of a parallel resonant quartz crystal resonator is an important, but often misunderstood value required in its specification and purchase.
Read more . . . . .
Resistor Colour Code:
The resistor colour code has been in use for many years for leaded resistors and gives an easy method of marking their value and tolerance in the component body. Can you remember the colours and their numbers and do you know how it started?
Read more . . . . .
BJT vs MOSFET - are BJTs outdated?
Despite the fact that MOSFETs are the go-to electronic component for many design, bipolar Junction Transistors, BJTs still beat them hands down in some areas.
Read more . . . . .
USB-C Decoding Guide: How to Read the Icons on Your Cables and Ports:
When using USB-C ports and cables it is essential to understand what the icons mean so that the right cables and interfaces can be used to gain the required performance.
Read more . . . . .
The USB-A Colour Code: Decoding the Plastic Centres:
The centre plastic of the widely used USB-A connectors (the large USB connectors) is colour coded & this provides useful information about the connector & the speeds, etc it can support.
Read more . . . . .
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!
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.
Classic Vintage Radios
Since the first radios were developed, many different radio designs have come and gone, but some stand out or are remembered as classic radios of their time.
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.
