Technical articles on Electronics and Electrical Engineering topics focused on Basics of EE, Electronic components, power systems and equipment used for generation, transmission, operation, and controls of electricity.
SCRs are unidirectional (one-way) current devices, making them useful for controlling DC only. If two SCRs are joined in back-to-back parallel fashion just like two Shockley diodes were joined together to form a DIAC, we have a new device known as the TRIAC: (Figure below) Because individual SCRs are more flexible to use in advanced control systems, … Read more
Shockley diodes are curious devices, but rather limited in application. Their usefulness may be expanded, however, by equipping them with another means of latching. In doing so, each becomes true amplifying devices (if only in an on/off mode), and we refer to these as silicon-controlled rectifiers, or SCRs. The progression from Shockley diode to SCR … Read more
Like all diodes, Shockley diodes are unidirectional devices; that is, these only conduct current in one direction. If bidirectional (AC) operation is desired, two Shockley diodes may be joined in parallel facing different directions to form a new kind of thyristor, the DIAC: (Figure below) A DIAC operated with a DC voltage across it behaves … Read more
Statement: The voltage drop across a series resistor is directly proportional to the magnitude of its resistance. Voltage Divider Circuit and Formula Consider a series circuit comprising of ‘n’ total resistors. The voltage divided across resistors Rx can be found from formula: Let’s understand it in series circuit with two resistors. VDR in Two Series … Read more
BJT MCQ Quiz
In this video you’ll learn about manufacturing process of Large power Transformers as well as small and medium sized distribution transformers.
When it comes to DIY and Electronics or Electrical Engineering projects soldering components together is a must. In this video you’ll learn How to solder like a PRO. You might also be interested in: 7 Points that should be kept in mind while using Transistors in your Projects 50+ Raspberry Pi Project Ideas
Our exploration of thyristors begins with a device called the four-layer diode, also known as a PNPN diode, or a Shockley diode after its inventor, William Shockley. This is not to be confused with a Schottky diode, that two-layer metal-semiconductor device known for its high switching speed. A crude illustration of the Shockley diode, often seen in textbooks, is a … Read more
Like its bipolar cousin, the field-effect transistor may be used as an on/off switch controlling electrical power to a load. Let’s begin our investigation of the JFET as a switch with our familiar switch/lamp circuit: Remembering that the controlled current in a JFET flows between source and drain, we substitute the source and drain connections of a … Read more
