In semiconductor and electronics industry, a diode is a widely used discrete component. It is a significant element in many electronic circuits and applications ranging from low power signal circuits to power rectification. Based on the functions and ratings, there are different types of diodes. However, all semiconductor diodes contain a PN junction to perform their basic operation.
Diodes – Types and Applications - [Link]
by Elektron8 @ instructables.com:
Welcome to this project. The CNC UNO is a small desktop CNC Mill that can be used for hobby engraving and routing, PCB milling and education. It is mainly made with 3D Printed ABS plastic parts and plywood. Before starting this project, please observe that this machine is not intended for precision work nor for cutting hard materials like metal. As the machine parts are made of plastic and wood, the machine will flex under heavy load and that is why this project is for fun rather than any serious application. That said, it is a great little machine for hobbyists that want something to play with without having to spend a fortune.
3D Printed Desktop CNC mill - [Link]
When observing basic rules will the top quality AGM VRLA batteries last you up to 15 years – we will advise how.
This description could start by a long list of technical improvements of Panasonic batteries. thanks to which they gained a stable place on the top of development in this segment (AGM, expanded positive grid. additives for regeneration from a deep discharge, self-extinguishing container material,…).
However those are things, which can be easily checked up from available internet source or even better from satisfied users. Instead of it, we better bring you a few advices for usage of VRLA/ SLA batteries to serve you as long as possible:
mbugs™ – the building blocks of an integrated ecosystem for the mbed online IDE that enables form-factor electronics prototyping.
The mbug ecosystem uses the mbed online compiler and SDK where you can quickly create embedded applications that are easily downloaded onto the mbug processor through a standard USB interface, just like adding a file to a USB flash drive.
In addition to the processor mbugs which run the applications, we’re offering a number of expansion mbugs that can be stacked onto the processor to create multifunctional systems. Together, you can use mbugs to build projects containing sensors, displays, relays, and servo motors.
mbugs – rapid-prototyping electronics for hobbyists and pros - [Link]
by Dooievriend @ tweakblog.tweakblogs.net:
More than a year ago, a friend of mine asked me to write the software for his 3D Spectrum Analyser (3DSA): a device that takes as input an audio signal, and outputs its visualisation on a 3D matrix of leds. If the above description doesn’t quite ring a bell, simply watch the end result in action.
First things first though, the microprocessor to be programmed was an 80MHz Olimex PIC32, soldered to the PIC32-PINGUINO-OTG development board. (For those who ever tinkered with Arduino boards: it’s the same, only with a faster chip and fewer builtin libraries ) The Algorithm had to sample the input signal at regular time intervals, convert this signal to the frequency domain, and visualize the detected frequencies on a 16x16x5 LED matrix.
3D Spectrum Analyser - [Link]
by Abhishek Gupta @ edn.com:
In the last 14 years, the Universal Serial Bus (USB) has become the standard interface to connect devices to a computer. Whether it’s an external hard drive, a camera, the mouse, a printer, or a scanner, the physical connection to transfer data between devices generally is a USB cable. The interface is indeed universal.
USB technology has been under development since 1993. The first official definition, USB 1.0, was introduced in 1996. It provides a Low-Speed transfer rate of 1.5 Mbits/s for sub-channel keyboards and mice, and a Full-Speed channel at 12 Mbits/s. USB 2.0, which came in 2001, made a leap to Hi-Speed transfer rates of up to 480 Mbits/s. In 2010, USB 3.0 finally hit the market.
USB 3.0 – Everything you need to know - [Link]
The circuit shown is a microcontroller based Energy Meter that uses MCP3905A as its main component, which is an energy-metering ICs that supplies average power information through a pulse with direct drive for mechanical counter. It includes a higher-frequency output supplying instantaneous power information for calibration while conforming the IEC 62053 International Metering Standard Specification. The energy meter provides exceptional accuracy in measuring the amount of energy consumed by an electrically powered device. It can significantly read immediate power usage, which may be used to perceive future energy consumption.
Microchip’s MCP3905A energy meter reference design is a standalone, single-phase residential meter for active energy meter design. In addition, MCP3906A can be used in the project. For calibrating the frequency output, a voltage divider calibration circuit was optimized. Each meter must be calibrated using the voltage divider circuit going into Channel 1 of the MCP3905A/06A. The MCP3905A/06A has appropriate bypass capacitors on VDD coming from the DC power supply circuitry and has its input logic pins connected to user-selectable jumpers, with the exception of the HPF pin. For this system, the HPF is turned ON with this pin connected to VDD. Moreover, the DC power supply is created from a half-wave Zener diode limited AC signal feeding a 7805 +5V regulator. The Zener diode D2 however, limits the peak voltage to 15V while the optical isolator is included in the reference design as an additional level of protection for other circuitry.
Energy meter system had been widely used to measure the energy consumption to residents, industries and businesses benefiting the power usage. It is typically calibrated in billing units such as kilowatt-hour and periodic readings of electric meters, which establishes billing cycles and energy used.
Energy Meter based on MCU - [Link]
by Colin Jeffrey @ gizmag.com:
Before the dream of quantum computing is realized, a number of inherent problems must first be solved. One of these is the ability to maintain a stable memory system that overcomes the intrinsic instability of the basic unit of information in quantum computing – the quantum bit or “qubit”. To address this problem, Physicists working at the University of California Berkeley (UC Berkeley) claim to have created breakthrough circuitry that continuously self-checks for inaccuracies to consistently maintain the error-free status of the quantum memory.
First-ever quantum device that detects and corrects its own errors - [Link]
We can control almost everything from our smartphone, tablet or smart watch these days, and thanks to the CleverLight™ Wi-Fi LED bulb, you can now control your lighting remotely without additional box.
We are pleased to announce that we have launched a new and unique product CleverLight™ Wi-Fi LED bulb.
Installation is as simple as removing your old bulb and installing CleverLight™ Wi-Fi LED bulb. Wall switch retains functionality.
In comparison to an incandescent bulb which lasts approximately 1,000 hours, CleverLight™ Wi-Fi LED bulb last at least 25,000 hours apiece at an estimated lifetime more than 20 years. With our LED technology 85 percent less power is needed than incandescent bulbs. CleverLight™ using up to 9 watts compared to a 60 watt incandescent bulb. Be smart with your energy.
To create the best user experience possible, we use Smart Config™ — a one-step and one-time process used to connect the CleverLight™ to a Wi-Fi network.
Just connect your Wi-Fi enabled phone or tablet to your access point, then enter your network’s password into the CleverLight™ App, and the setup process completes in less than thirty seconds.
CleverLight – Affordable Smart Wi-Fi LED Light Bulb - [Link]
by w2aew @ youtube.com
The Vbe Multliplier circuit, also known as an Amplified Diode or Adjustable Diode, is a useful circuit that allows you to set a user desired voltage drop without using a series combination of diodes or zeners. This video describes and demonstrates how this circuit works, and shows a few applications where it is used. It is commonly used to set the bias on a low-impedance push-pull output stage of an amplifier. All transistors shows are typical general purpose devices like the 2N3904/2N3906. The scope is being used as a simple curve tracer in the first part of the video.
Basics of a Vbe Multiplier: what it is, how it works & where it is used - [Link]