How to Design a Common Emitter Transistor Amplifier
The common emitter amplfier stage is one of the basic building blocks for transistor circuit design. Use our step by step instructions to explain what to do.
Clear resources & 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 hub or 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 resources and 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 not only our own downloadables and coffee mugs, etc, but also a huge number of electronics products from our selected suppliers. Check it out now!
ElectronicsNotes Videos
My YouTube Channel: What's Happening
Are you thinking of buying a Morse paddle - yes, they're really expensive, but wait, there's the Xiegu VK6 iambic key - is it worth considering. Discover in my forthcoming video.
I'm also preparing videos on topics including SWR / VSWR, gold conductivity and a few other ideas. And I am finishing off my 2N30055 video. I've also just discovered a pack of old diodes: I'll be taking a look at these and seeing what semiconductor technology was like in the 1950s and 1960s.
There are plenty more exciting ideas in the melting pot that will be coming soon, including some about the latest component technology, so keep checking out my YouTube channel.
Today's Selected Videos
Latest Videos
Video: The SMD Sizing Trap That Breaks PCB Layouts
Video: Vanishing AM Radio: will you miss these iconic broadcasts
ElectronicsNotes website content
Wi-Fi - the key elements
Wi-Fi is used in the home office and in very many public areas to provide short range high data throughput connectivity. Find out how it works
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.
Latest Pages
Why Connectors Use Gold Plating (When Copper and Silver Conduct Better):
Discover why gold is used in electronic connectors despite lower conductivity, featuring barrier layers, hard gold alloys, and oxide protection.
Read more . . . . .
How Small Magnetic Loop Antennas Work: The Ultimate High-Noise HF Solution:
Discover how small magnetic loop antennas work, why they reject urban electrical noise, and how to use them for superior HF radio reception.
Read more . . . . .
Inside a Bluetooth Speaker: Electronics & Hardware Teardown Guide:
Discover what's inside a Bluetooth speaker with my detailed teardown, exploring the circuit board, Bluetooth SoC, audio amplifier, and acoustics.
Read more . . . . .
SMD Passive Component Sizes Explained: Imperial vs Metric Package Size Trap:
Decode SMD component size codes with our complete Imperial vs Metric guide - avoid PCB layout errors and learn how 0805, 0603 & 0402 package sizes compare, and the size trap.
Read more . . . . .
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 . . .
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.
Spark Gap Transmitters
The spark gap transmitter was the first type of transmitter to be used. Although very inefficient and crude by today\'s standards, it was the first form of transmitter to enable radio to span the Atlantic Ocean.
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.
