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4 Oct 2011

RF networking is getting huge these days. With new RF nodes being developed on what seems like a monthly schedule. This means new and established companies are getting in the game. I’m pretty sure that everybody knows of Digi international (manufacturers of Xbee RF nodes) and regard them to be the current King of RF networking, BUT with ninja-like progress companies like Synapse Wireless have snuck up on them and started offering superior products. Syanpse nodes have the ability to wirelessly program Arduino UNOs at distances of >250ft without hardware mods or painful configuration processes. The nodes are both a network module and user-programmable microcontroller in one and on top of that they have to ability to do self-healing mesh networking. Their specs seem to outdo xbees on many levels, which begs the question, Synapse Wireless where have you been all my life??? :)

There’s a New SheRifF in Town and Their Name is Synapse Wireless - [Link]


11 Sep 2011

embedded-lab.com writes:

A lot of times we need to keep track of data from a device or a sensor located in a remote location from the point where it is processed. In other situations we desire wireless solutions for ease. Using long cables, infrared (IR) or other means are often tedious and not loss-less. Imagine collecting pH level data from a chemically lethal or toxic treatment plant where human presence is highly health hazardous. Running long cables from the pH sensor to the control or monitor station will surely introduce noisy signals and signal-to-noise ratio will thus drastically decrease. The result is erroneous data acquisition and thereby false decisions may be generated. If infrared signals or other optical means including lasers are used, they will need good obstacle-free line of sight or expensive and delicate optical fibers. Thus the solution stays in the radio frequency (RF) domain. This article talks about interfacing low cost RF modules (KST-TX01 and KST-RX806) for transmitting data between two remotely located PIC microcontrollers.

Wireless data transmission between two microcontrollers using KST-TX01 and KST-RX806 rf modules - [Link]

10 Sep 2011

The RC1180-KNX2 from Radiocrafts AS targets building automation applications and claims to be the world’s first RF module with a complete embedded KNX-RF multiprotocol stack. KNX-RF Multi is an extension of the European standard for building automation with extra redundancy and increased reliability. The embedded protocol is backward compatible with KNX-RF 1.1 and KNX Ready and can be used with unidirectional and bidirectional devices.

The new module is intended to be used with sensors, actuators and other home and building automation devices. It operates in the 868 MHz band using Listen Before Talk (LBT) and frequency agility to reduce collisions. Up to five frequencies are scanned and selected automatically. A single receiver can be linked with up to 64 transmitters, enabling very large RF networks. [via]

RF module features embedded multiprotocol stack - [Link]

3 Sep 2011


Rectenna “Converts” Radio Waves To Electricity - [Link]

2 Sep 2011

Inspired by the finding that over 60% of oscilloscope users also use a spectrum analyzer to troubleshoot embedded system designs with integrated wireless functionality, Tektronix has developed the world’s first mixed domain oscilloscope (MDO), which provides the functionality of an oscilloscope and a spectrum analyzer in a single instrument. The new MDO4000 Mixed Domain Oscilloscope series gives engineers the unique ability to capture time-correlated analogue, digital and RF signals for a complete system view. [via]

Scope / spectrum analyzer combo captures time-correlated analogue, digital and RF signals - [Link]


22 Jul 2011

Semiconductor manufacturer NXP is mighty proud of its new high-power transistor, called BLF578XR, which is good for 1.2 kilowatts of RF power output. The device is suitable for use in RF amplifiers operating within the in the 10 to 500 MHz frequency range and has proved it’s up against extremely adverse operating conditions. [via]

The first indestructible transistor? - [Link]

15 Jul 2011

For sure, right now you’re surrounded by electromagnetic energy transmitted from sources such as radio and television transmitters, mobile phone networks and satellite communications systems. Researchers from the Georgia Institute of Technology have created a device that is able to scavenge this ambient energy so it can be used to power small electronic devices such as networks of wireless sensors, microprocessors and communications chips.

Manos Tentzeris, a professor in the Georgia Tech School of Electrical and Computer Engineering, and his team used inkjet printing technology to combine sensors, antennas and energy scavenging capabilities on paper or flexible polymers. Presently, the team’s scavenging technology can take advantage of frequencies from FM radio to radar, a range of 100 MHz to 15 GHz or higher. The devices capture this energy, convert it from AC to DC, and then store it in capacitors and batteries.

Capture free energy 24/7 - [Link]

16 Jun 2011

dangerousprototypes.com writes:

Deepak from Mindfront.net acquired a PIR alarm sensor module which transmitted a digital code over 433 MHz RF to signal an alarm receiver. The problem: he didn’t have the factory receiver. So he set out to sniff the transmitted RF signal using a RCR-433-AS receiver module with the data out fed into an oscilloscope. This allowed him to monitor the digital coded signal pattern and decode it into individual bits.

Hacking a PIR RF signal with PIC 12F683 – [Link]

9 May 2011

FBI Tracking Device Teardown [via]

We partnered with Wired to bring you a peek inside an FBI car-tracking device… The device comprises of a GPS unit for receiving the car’s position, an RF transmitter for relaying your location to the interested authority (aka the FBI), and a set of sweet D-cell batteries that power the whole enchilada. But we didn’t stop there, of course. Read on to find out exactly what components make this secretive device tick.

FBI Tracking Device Teardown – [Link]

6 May 2011

Powercast Corporation has unveiled its Lifetime Power Wireless Sensor System for wireless environmental monitoring in HVAC control and building automation systems, which uses RF energy broadcast by remote units to power wireless sensor nodes without batteries or wires.

The Powercast system consists of three parts: a family of batteryless sensor nodes with embedded Powerharvester receivers for wireless power, a WSG-101 building automation system (BAS) gateway, and a TX91501 Powercaster transmitter. The first member of the family of sensor devices is the WSN-1001 wireless temperature and humidity sensor. Additional sensors for measuring measure CO2, pressure, light level, motion and other conditions will follow shortly. [via]

Batteryless RF-powered wireless sensor system targets building automation – [Link]





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