by University of Bristol:
A breakthrough in the design of signal amplifiers for mobile phone masts could deliver a massive 200MW cut in the load on UK power stations, reducing CO2 emissions by around 0.5 million tonnes a year.
Funded by the Engineering and Physical Sciences Research Council (EPSRC), the Universities of Bristol and Cardiff have designed an amplifier that works at 50 per cent efficiency compared with the 30 per cent now typically achieved.
Currently, a 40W transmitter in a phone mast’s base station* requires just over 130W of power to amplify signals and send them wirelessly to people’s mobiles. The new design, however, enables the transmitter to work effectively while using just 80W of power.
New design for mobile phone masts could cut carbon emissions - [Link]
Compact battery chargers require overcurrent protection and temperature monitoring to ensure safety. These chargers also need to fit into small form factors, and generally have a lot of pressure to also be very inexpensive, but only have to provide a simple charging ability.
Furthermore, compact packaging is required to integrate the battery charger into a system. Renesas has 8/16-bit microcontrollers available in compact packages with as few as 10 pins, making them ideal for these applications.
78K0/Kx2: 8-bit All Flash microcontroller: wealth of on-chip peripheral functions such as a reset circuit and on-chip oscillator; low power consumption,30 to 80 pins.
78K0/Kx2-L: 8-bit All Flash microcontroller: wealth of on-chip peripheral functions such as a reset circuit, on-chip oscillator, and operational amplifier; ultra-low power consumption, 16 to 48 pins
78K0S/Kx1+: 8-bit All Flash microcontroller: wealth of on-chip peripheral functions such as a reset circuit and on-chip oscillator; 10 to 30 pins
R8C Family: Timer, 5 V operation, and Small Package
P-ch MOSFET: Low on-resistance, compact low-profile
Renesas Battery Charger Solutions - [Link]
This guide is intended to everyone interested in in using Accelerometers and Gyroscopes as well as combination IMU devices (Inertial Measurement Unit) in their electronics projects
- What does an accelerometer measure?
- What does a gyroscope (aka gyro) measure?
- How to convert analog-to-digital (ADC) readings that you get from these sensor to physical units (those would be g for accelerometer, deg/s for gyroscope)
- How to combine accelerometer and gyroscope readings in order to obtain accurate information about the inclination of your device relative to the ground plane
Accelerometer & Gyro Tutorial - [Link]
Do you need a quick and easy way to program AVR chips. Did you know you can use your Arduino and the Arduino IDE? This Arduino shield makes the process much easier.
Arduino AVR Progamming Shield - [Link]
At Dangerous Prototypes we have a team of amazing PCB designers. We crank out a lot of boards publicly and privately, but even we can’t keep these hungry routing addicts busy all the time. Now we’re lending our routing skills to you for your open hardware project through a new site: Dirty Circuits.
If you have an open hardware project and would like help routing the PCB, we’re here to help.
Dirty Circuits PCB routing for open hardware designs - [Link]
Spring offer of company Wago brings you a price gainful set of favorite terminal blocks together with a novelty – quality clamp multimeter.
Installation terminals Wago 2273 series are becoming a standard in installations and they gradually replace their predecessors – series 273. They´re well known, but if you by a happen don´t know them yet, you can get a brief description for example in a video below this article.So why do we mention them? Because company Wago comes as usually in spring, with a special offer, when you can buy a set of Wago terminal blocks Wago together with some useful tool, multimeter and similar. This time it´s a really attractive offer, because in a set containing 950 pcs of installation terminal blocks you will gain a novelty from Wago – a professional clamp true RMS multimeter type 206-816 (CAT III). Besides a majority of common function it´s also able to measure capacity, frequency, wide measuring range (600V, 600A, 60 MOhm) and also for example a very useful complement at measuring in dark environment – an integrated LED torch.
For the price of 149 Eur you can gain a set of 950 pcs terminal b locks and a universal professional measuring tool. Set of 950 pcs terminal blocks consists of 100 pcs 224-112, 100 pcs 2273-202, 300 pcs 2273-203, 100 pcs 2273-204, 300 pcs 2273-205 and 50 pcs 2273-208.
Fresh offer of Wago terminal blocks with a clamp TRMS multimeter - [Link]
by Hanne Degans:
Holst Centre and IMEC have unveiled a prototype flexible health patch weighing just 10g – half the weight of current products. The patch uses real-time electrocardiogram (ECG), tissue-contact impedance and accelerometer information to accurately monitor physical activity. Thanks to advanced system in package (SiP) technology from ShinkoElectric Industries, the electronics module measures less than two by two centimeters. The high accuracy algorithms, low power consumption, and small size and weight make it ideal for consumer applications.
Small, light health patch with enhanced accuracy - [Link]
This is a complete mobile MP3 player and first mp3-player with ATmega8 and Nokia 6100 color display.
An demo firmware and gerber file for board will be available soon.
This player has capability to play wav and mp3 files and view BMP files on 8 or 24 bits/pixel from a MicroSD card with maximum capacity 2GB, the format of the SD is FAT32 with clusters from 512 Bytes to 32768Bytes, the filesystem has no limits in number of directories and files.
For future i want to adapting the SD driver for SDHC because the filesystem is designed to use all capacity of fat32 ( 2TB in 512Bytes/sector)
List of features:
Play Wav and MP3 Files because the VS1011a only this files is capable to decode( but for future in this project i want to include the VS1053 chip to play more file formats.
View Bitmap files on 8Bit and 24 bit/pixel
This project is in asm language and my 100% own libraries
DiY: most tiny MP3 player with ATmega8 VS1011a and Nokia6100 Display - [Link]
What’s inside a Dräger Multiwarn II gas detection warning system used in mining, oil, chemical, and emergency services etc to detect hazardous or explosive atmospheres.
Intrinsic safety design and how both catalytic bead and infrared IR gas detectors work, and pellistors. And a teardown of a Hydrogen Sulfide (H2S) sensor.
EEVblog #603 – Gas Sensor Teardown – Dräger Multiwarn II - [Link]