This project is designed to operate with minimum of external components. This amplifier offers high quality and high performance audio at very low distortion. Project is based on nationals LM1875 IC. The IC is thermal and short circuit protected.
The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications, the project work on single supply. Device overload protection consists of both internal current limit and thermal shutdown.
20W Audio Amplifier - [Link]
Banguino brings the most popular hobby and DIY development platform in the world into a single chip DTX module and offers full backwards compatibility with the most used worldwide Arduino board – the model ‘Uno’.
Bonus features include an on-board power supply to generate +5V and +3.3V to the user’s external circuit, a microSD connector and additional 10 configurable digital I/O ports. There are also two software controllable LEDs on board as well as a USB-to-UART bridge. Banguino provides a highly integrated solution for building simple or complex circuits and benefiting from the large variety of already existing Arduino-compatible code.
Banguino – 8-bit Processing Module - [Link]
by aehparta @ tldr.fi:
My lifetime project: building an 8-bit computer using Z80 CPU. This week I had a bad flu and could not do anything useful so I decided to dig up my old plans for this project. I first re-designed many things, like power, CPU-board, IO-board and so on (my old plans were around 10 to 15 years old). After some thought I realized: When I get even the CPU-board working, I want to display some stuff! So why not build the display adapter first. Plus I planned to build the adapter in a way that it can be used separately from the computer itself. Easy thing to start with.
Building a simple VGA-adapter for 8-bit self made computer - [Link]
Espruino Pico has everything you need pre-installed. It can be used from virtually any device with a USB port so you can get started in seconds.
A project has been designed around Holteks Ht8970 voice echo IC. Project can be used in various audio systems karaoke, toys, animatronics, show, display, exhibitions, and sound equipments.
The HT8970 is an echo/surround effect processor. It is designed for various audio systems including karaoke, television, sound equipments, etc. The chip consists of a built-in pre-amplifier, VCO or Voltage Control OSC, 20Kb SRAM, A/D and D/A converters as well as delay time control logic.
Voice Echo - [Link]
Paul Buckley @ edn.com:
MIT researchers have developed a circuit design that could make simple superconducting devices with zero electrical resistance much cheaper to manufacture, and which would be 50 to 100 times as energy efficient as today’s chips. Even though the circuits’ speed probably would not top that of today’s chips, they could solve the problem of reading out the results of calculations performed with Josephson junctions.
Simpler superconducting promised by nanowire device - [Link]
by Dario Borghino @ gizmag.com:
A new power inverter developed at the Oak Ridge National Laboratory (ORNL) marries advances in 3D printing and wide-band semiconductor technology to deliver significantly improved performance in a smaller, lighter package. With further development, it could go a long way toward helping build electric cars that are more powerful and energy-efficient.
New power inverter could make EVs more powerful and efficient - [Link]
WinHeist is an electronics component organizer that was developed by a programmer with an electronic habit. It has developed over the years from a personal application used by the author into the full blown application that it is today.
To get a look at WinHeist and get an idea of what it is and what it can do go to the online help.
WinHeist – An Electronic Components Organizer for Every Hobbyist - [Link]
Low-cost, high quality reflow oven for surface-mount PCB assembly at home. Get professional results consistently and reliably!
ControLeo2 Reflow Oven - [Link]
Its lifetime may not be quite over yet, but the humble television is facing some stiff competition from the computer, as the entertainment portal of choice. Widespread access to superfast broadband means that users are now able to stream films and television shows, download music and of course browse the net 24/7, from wherever they are in the home.
Around 94% of homes in America are now online, and the television is starting to lose its dominance as the most watched screen in the house.
Smart televisions may be the way forward for those looking for easy access to online services, but for many people the computer is the only, all-purpose entertainment device needed. Television networks have recognised that we are now becoming an online society, which is one of the reasons why so many shows are now also available via the net.
Print newspapers are in decline due to the implementation of online versions and of course, it’s becoming almost impossible to find those film rental stores thanks to film streaming! Desktop computers and even laptops are quickly becoming the only device you need for every form of home entertainment. Read the rest of this entry »