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Learning about Electronics is the place to come to learn electronics. Attached to the Articles tab are articles that answer many questions about electronics that you may have, with more being added daily. This is not just a Q&A site as we also give real-life uses and projects of components, devices, and equipment that we explain with as many photos and videos that we can provide.
Antennas are used to transmit and receive information through changes in the electromagnetic fields that surround them. This article is a primer on antenna theory.
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Standing wave ratio can be very important when using a transmitter. If the level of standing waves is too high then it can either damage the transmitter or transceiver output, or cause it to reduce its power. So measuring the SWR is important. Knowing how to use an SWR meter and connect it up
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Here we learn the most fundamental relation in all of circuit analysis - Ohm's Law. Ohm's law relates the voltage, current, and resistance together in a single equation and is used in all analysis of electric circuits.
This physics tutorial provides a basic introduction into capacitors. It explains the concept of capacitance and how it works. It also discusses the working principle of capacitors. This video contains plenty of examples and practice problems for you to work on. Here is a list of topics. 1. What is a capacitor? 2. Capacitors are made of two metal conductors separated by an insulator such as air, quartz, mica, or even water 3. Electric Charge, Capacitance and Voltage 4. The unit of electric charge is the coulomb 5. Common Units of Capacitance - Farads, uF, nF, pF 6. Capacitance - Charge Efficiency - Coulomb per volt 7. Electric Potential - Potential Energy Per Unit Charge 8. Voltage vs Electric Potential 9. Calculating Electric Charge Given Excess Number of Electrons 10. Calculating The Number of Protons and Electrons Giving Total Charge on Metal 11. Parallel Plate Capacitor Formula 12. Relationship Between Capacitance, Area, and Distance 13. Permittivity of Free Space Constant 14. Dielectrics, Capacitance and Voltage Relationship 15. Calculating the New Capacitance and Voltage When Dielectric Constant / Insulator is Used 16. Electric Field of Parallel Plate Capacitor 17. Surface Charge Density, Electric Field, Total Charge, and Area Calculations 18. Capacitance Equation / Formula Derivation 19. Potential Energy Stored in a Capacitor 20. Energy Density inside Electric Field Between Parallel Plate Capacitor 21. Capacitors - How it works 22. Explaining the concept of charging capacitors - using electron flow and charge accumulation 23. Discharging a capacitor explained - Electron flows until a state of equilibrium is achieved.
Karen discusses transistors. Rather than using a physical, mechanical switch, a transistor can act as an electronic switch, using signals to turn it on or off. She'll go over what they are, how they work, and some types of transistors. She covers Bipololar junction transistors (BJT), NPN
I would like to thank those who did the video's and the websites for allowing us to us and share this information to help others in Amateur Radio & Electronics Fields.. We will add more as time goes on, and hope that all information has been useful to you ..we have found that not only articles but video's are much easier to learn from ...
A basic guide to identifying components and their functions for those who are new to electronics. This is a work in progress, and I welcome feedback from you guys on whether I should break it down into more manageable chunks. I've kept the maths to a minimum, since it can be off-putting to someone just getting started in electronics. The idea of this video is to slot in some more of the jigsaw pieces involved in learning electronics, when you start to recognise components, but aren't quite sure what they are or what they do. It's tricky to squeeze even the basics into a single video.