A Discrete Transistor 7400 NAND GATE

A Discrete Transistor 7400 NAND GATE

“If we did not have ICs then this is what a 7400 NAND gate would look like! The 7400 TTL (and LS-TTL) quad NAND gate is one of the most common integrated circuits (IC) around. Here is a discrete transistor version. To show that it works it is used as an LED flasher. “

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Digital IC Projects

Digital IC Projects

“This book contains both simple and more advanced projects, and it is hoped that these will be found of great help in developing a knowledge of the workings of digital circuits. Various forms of assembling and wiring the integrated circuits on their boards are shown, and this aspect of a project can be quite straightforward, and not need the preparation …

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ESP32 LORA - Alarm With IR Barrier

ESP32 LORA - Alarm With IR Barrier

“Considering that it offers a solution to many current problems, today I am continuing the discussion concerning the ESP32 LORA, a marvel for this Internet of Things world. In this article, I deal again with safety when discussing an infrared (IR) barrier alarm. Our project is formed by two communicating ESP32 LORAs. One will be the ISSUER and will be …

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Handbook of Transistor Circuits

Handbook of Transistor Circuits

“This handbook describes in detail a wide range of electronic circuits designed around that tiny but versatile modern device, the transistor. The arrangements described have a great variety of practical uses. Some of these circuits derive their power solely from low - voltage battery sources; and have no connection of any kind whatsoever with the electric supply mains.”

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IOT123 - 5Pin Attiny85 Nrf24L01 Brick

IOT123 - 5Pin Attiny85 Nrf24L01 Brick

“The IOT123 BRICKS are DIY modular units that can be mashed up with other IOT123 BRICKS, to add functionality to a node or wearable. They are based on the inch square, double-sided protoboards with interconnected through holes. This BRICK adds 2.4GHz RF connectivity to a master for IOT node data aggregation. It is not very flexible as it only …

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Premiere at Hannover Messe: Fully 3D-Printed Electric Motors

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Premiere at Hannover Messe: Fully 3D-Printed Electric Motors

“Chemnitz University electrical engineers are the first in the world to print electric motors using iron, copper and ceramics Using metallic and ceramic pastes, extruded layer by layer into a predetermined form and then sintered together, researchers from the Chemnitz University of Technology Professorship of Electrical Energy Conversion Systems and Drives were able to 3D-print an entire electric motor. “We …

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Researchers Engineer New Pathways for Self-Assembled Nanostructures

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Researchers Engineer New Pathways for Self-Assembled Nanostructures

“ One way that scientists control the structure of materials at the nanoscale – where features are a few to several hundred nanometers (nm) – is by using “self-assembly,” in which molecules are designed such that they spontaneously come together to form a desired structure or pattern. Self-assembly is a powerful approach to controlling order at the nanoscale and is one way that …

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Robot Developed for Automated Assembly of Designer Nanomaterials

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Robot Developed for Automated Assembly of Designer Nanomaterials

“A current area of intense interest in nanotechnology is van der Waals heterostructures, which are assemblies of atomically thin two-dimensional (2D) crystalline materials that display attractive conduction properties for use in advanced electronic devices. A representative 2D semiconductor is graphene, which consists of a honeycomb lattice of carbon atoms that is just one atom thick. The development of van der …

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Some superconductors can also carry currents of ‘spin’

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Some superconductors can also carry currents of ‘spin’

“Researchers have shown that certain superconductors – materials that carry electrical current with zero resistance at very low temperatures – can also carry currents of ‘spin’. The successful combination of superconductivity and spin could lead to a revolution in high-performance computing, by dramatically reducing energy consumption. Spin is a particle’s intrinsic angular momentum, and is normally carried in non-superconducting, non-magnetic materials …

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Transistor AF and RF Circuits

Transistor AF and RF Circuits

“The use of semiconductors in electronic circuits has, and still is, growing at a rapid rate. Experimenters and hobbyists are continuously looking for transistor circuits to construct. This book is a compilation of many r -f and audio circuits using transistors. In each of the five sections of the book, you will find schematics, parts lists, and discussions of operation …

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