Learn how to create your own low cost wireless sensors and connect them to the world.
Store your sensor data at home or in our cloud. We provide fancy graphs and other great online tools to help you manage and analyze your sensor data!
mysensors.org – Learn how to create your own low cost wireless sensors - [Link]
Integrated Device Technology has released what is said to be the world’s smallest 2W contactless-charging power receiver chip. In the future when all our internet-connected portable and wearable devices need a recharge after a busy day with their head in the cloud, contactless charging will be the way to go. The IDTP9026 wireless-charging receiver chip has a board footprint of just 30 square millimetres and is designed to charge a standard lithium-ion battery rated at 4.2 V. An AD pin allows the device to be switched out of the charging circuit when an external adapter is used for recharging. A separate enable pin is also available to turn the device off.
Receiver Chip for Wireless-Charging - [Link]
To my computer, its simply a USB keyboard, nothing less, but to me its a remote I can use on any platform with no line of sight. I decided to name it the keyMote. Sounds a bit odd to my ears but its a fitting name.
Here is how it works. There are two parts to this system, the remote, which is battery powered, and the base, which is hooked up to a computer. The remote is a simple keypad (In the case of the prototype, its a numeric keypad, but really, it could be any interface) with a transmitter hooked up to it. The base, the other end, is a receiver with USB Human interface device functionality, in other words, a vanilla USB keyboard. When a button is pressed, the remote sends the identifier of that button to the base which then looks up in a table the keystrokes this identifier is mapped to and sends those to the computer via USB. What button is mapped to what keystroke is entirely configurable using a serial terminal interface (shell) to the base. It can be anything, Ctrl-C, Alt-Shift-F, PageUp, etc. Getting it to interface with your program is then simply a matter of configuring keyboard shortcuts.
keyMote: a simple wireless remote for computers - [Link]
Stanford researchers, lead by electrical engineer Ada Poon, are working on midfield wireless power for medical implants, ranging in application from nerve stimulation to medication delivery. [via]
Midfield Wireless Power for Implants - [Link]
The Ciseco SRF shield instantly transforms any Arduino style board into a fully wireless device. There are no jumpers to worry about, no configuration to be done, simply plug in and begin coding. The shield utilises the world’s best value, secure wireless module, the SRF.
You can securely exchange data with all other Ciseco radio devices, including the ultra-long range ARF. Designed for ease of use, the shield uses normal ASCII when transferring data, requiring no library or complex software. This means all your memory space is for code, not to drive the radio. All settings can be accessed or changed via standard text based AT commands.
The shield has extra pads to allow for configurations such as; Over the Air Programming of your micro, low power sleep states and adding an external antenna to extend the range.
The SRF has flexible frequency and power settings, to cater for all global radio regulations; these are easily set in software.
- Slice of Radio – Wireless RF transciever for the Raspberry Pi
- XRF wireless RF radio UART serial data module XBee shaped
- SRF-Stick 868-915 Mhz easy to use USB radio
Ciseco SRF shield transforms any Arduino into a fully wireless device - [Link]
Worlds first affordable plug & play, secure, long range wireless for Arduino
SRF Shield – Instant wireless networking for Arduino - [Link]
Yonggang Huang who together with Professor John Rogers led the project explained “We designed this device to monitor human health 24/7, but without interfering with a person’s daily activity, what’s important about this device is it is wirelessly powered and can send high quality data about the human body to a computer, in real time”. In a side by side comparison with conventional EKG and EEG monitor skin probes they found the wireless patch performed equally well but was significantly more comfortable and less invasive for patients. In addition to monitoring health and fitness data the sensors could also prove useful in identifying body movements characteristic of the early stages of neurological disorders such as Parkinson’s.
“The application of stretchable electronics to medicine has a lot of potential,” Huang said. “If we can continuously monitor our health with a comfortable, small device that attaches to our skin, it could be possible to catch health conditions before experiencing pain, discomfort and illness.”
Photo by John A. Rogers
Smart Band-Aid Wirelessly Monitors Health - [Link]
Murata SN8200 Wireless Development Kit+ is a self-contained, Broadcom-based, 802.11 b/g/n Wi-Fi network controller module that provides serial-to-Wi-Fi connectivity to the Internet. It provides the necessary protocols for devices communicating with the Internet. In a compact size, SN8200 integrates an ARM Cortex M3-based controller, Wi-Fi BB/MAC/RF IC, RF front end, flash memory, clocks, and on-board antenna in one small form factor. The device has everything you need in setting up your own wireless network, making it ideal for applications such as stand-alone webservers, smart medical and fitness devices, and even for home automation or industrial control monitoring.
Setting up the module is fast and easy. Included on the software CD is the EZ Web Wizzard™, a custom software by Murata that supports easy web-based control. There is also a Quickstart Guide pdf for your reference. Going through theEZ Web Wizzard™ will help you process and install the Simple Network Interface Controller (SNIC) and after that you can install the drivers and start connecting to the device. Read the rest of this entry »
Cortado connects your physical things to the digital world. Itʼs an Arduino that youʼll never plug in, and it works on all your favorite platforms including mobile (Mac, Windows, iOS, Android). It connects via Bluetooth Low Energy, an efficient protocol meant for supporting low-power sensors. If there ever was a building block for the Internet of Things, this is it.
It’s so easy to interact with Cortado, we think it will inspire an entirely new interaction flow. To illustrate this, the pre-ordered units will be turned on before they ship. If you download our app, you will get a BLE notification on your iPhone when your Cortado is nearby. Youʼll even be able to program it while it’s still in the box!
For the next month we will be holding a pre-order campaign featuring our new product. This campaign includes a special pre-order discounted price for all backers. It will launch at $18 and will increase every day as the month goes on reaching a maximum of $24, which is discounted 20% from the retail price ($30).
Cortado – Zero wires. Infinite uses - [Link]
By Bill Schweber:
In a wireless design, two components are the critical interfaces between the antenna and the electronic circuits, the low-noise amplifier (LNA) and the power amplifier (PA). However, that is where their commonality ends. Although both have very simple functional block diagrams and roles in principle, they have very different challenges, priorities, and performance parameters.
How so? The LNA functions in a world of unknowns. As the “front end” of the receiver channel, it must capture and amplify a very-low-power, low-voltage signal plus associated random noise which the antenna presents to it, within the bandwidth of interest. In signal theory, this is called the unknown signal/unknown noise challenge, the most difficult of all signal-processing challenges.
Understanding the Basics of Low-Noise and Power Amplifiers in Wireless Designs - [Link]