kraftwerk opens up a whole new dimension in freedom and independence when it comes to supplying your mobile electronic devices with energy. Why? Because kraftwerk enables you to generate your own energy using a small, handy device – in such large amounts that you can run your iPhone, tablet, or even your GoPro camera for weeks!
The Kraftwerk Fuel Cell - [Link]
by Nurgak @ github.com:
To measure my electricity usage I decided to build a small system that would count LED blinks on my power meter which indicate the used Wh. It was pretty straight forward system requiring an Internet connected microcontroller to log the data and some sort of sensor that would detect LED blinks on the power meter which is not my property and thus not accessible or modifiable.
The main reason to do this project is to get a better overview of the electricity usage as the house is heated by a heat pump so basically everything works on electricity or other free (thermal solar collector) and renewable sources (stove).
I had a CC3200 development kit laying around, it’s featuring a chip with Wi-Fi and an ARM Cortex-M4 processor running at 80MHz, it was more than enough to fill all the needs of this project.
Electricity usage monitor - [Link]
by Ilija Uzelac @ edn.com:
This Design Idea presents a simple, proven, reliable, and robust method for charging large capacitor banks, using a series connection of power MOSFETs to raise the breakdown voltage over that of an individual MOSFET.
When a power supply drives a large capacitive load, inrush current, if not limited, can reach tens or hundreds of amps for a high voltage power supply. In general, maximal ratings of a power supply could be transiently exceeded by many times, but this is generally acceptable when the transient lasts a few AC-line cycles. This is typical for load capacitances up to a couple of hundred microfarads, but for load capacitances in thousands of microfarads, an inrush current limiter is a must.
Series-connected MOSFETs increase voltage & power handling - [Link]
by mjlorton @ youtube.com:
I take a look at the YZXstudio USB 3.0 Power Monitor with OLED display which is sold by Franky – http://stores.ebay.com/99centhobbies
I demonstrate this very handy tool on a UBS power bank and show the issues with the USB voltage and losses across a USB cable.
USB 3.0 Power Monitor – YZXstudio - [Link]
At the IEEE International Electron Devices Meeting (IEDM) 2014 held in San Francisco last week the laboratory for advanced research in microelectronics (Imec) announced they had designed an 8-bit RFID transponder chip that used so little power it could run for 20 years on a single AAA battery. If predictions about the interconnectivity of all ‘things’ in the future are to be realized then it will be necessary to optimize the design of sensors and electronics so that they do their job using as little energy as possible.
Ultra Low Power Chips - [Link]
MCP19118/9 Provide Simple Analog PWM Control and Configurable MCU in Compact Circuit Solution; Industry’s First PMBus Compatible Controller With Up to 40V Operation.
Microchip Technology Inc. announced its latest Digitally Enhanced Power Analog (DEPA) controllers—the MCP19118 and MCP19119 (MCP19118/9). They provide simple yet effective analog PWM control for DC-DC synchronous buck converters up to 40V, with the configurability of a digital MCU. And they are the industry’s first devices to combine 40V operation and PMBus communication interfaces. These features enable quick power-conversion circuit development with an analog control loop that is programmable in the integrated 8-bit PIC MCU core’s firmware. This integration and flexibility is ideal for power-conversion applications, such as battery-charging, LED-driving, USB Power Delivery, point-of-load and automotive power supplies.
New Digitally Enhanced Power Analog Controllers From Microchip - [Link]
The Gertbot board works as either a stand-alone power controller connected to a computer via a serial link and controlled from Windows or as a plug-in to the Raspberry Pi environment. It has four channels each capable of driving 30 V at 2.5 A and can drive both capacitive and inductive loads. Besides four H-bridges the board also has two open drain N-MOSFETS which can sink 3 A at 30 V. The board is primarily targeted to drive stepper motors, brushed motors and other robotic hardware but it will be just as much at home controlling power in other applications. The outputs have short-circuit and thermal protection.
The Gertbot Power Controller - [Link]
by Susan Nordyk:
A four-channel PMBus digital power-system manager IC, the LTC2975 from Linear Technology, performs current, power, and energy monitoring of the intermediate-bus input to point-of-load (POL) converters. The device relieves the host of burdensome computation and poling by providing the energy consumed, reported in joules, and the elapsed time through a PMBus interface. When combined with its digital measurements of POL output voltages, current, and power, the input data enables long-term monitoring of a power system’s conversion efficiency.
Monitor IC optimizes board energy consumption - [Link]
by Rob Matheson @ phys.org:
Stream video on your smartphone, or use its GPS for an hour or two, and you’ll probably see the battery drain significantly. As data rates climb and smartphones adopt more power-hungry features, battery life has become a concern. Now a technology developed by MIT spinout Eta Devices could help a phone’s battery last perhaps twice as long, and help to conserve energy in cell towers.
Beating battery drain: Power-conserving chip may increase smartphone battery life - [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]