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2 Feb 2015

Pi_II_iso_ORIG

The Raspberry Pi 2 – Model B – ARMv7 with 1G RAM is here!

The Raspberry Pi 2 delivers 6 times the processing capacity of previous models. This second generation Raspberry Pi has an upgraded Broadcom BCM2836 processor, which is a powerful ARM Cortex-A7 based quad-core processor that runs at 900MHz. The board also features an increase in memory capacity to 1Gbyte.

Broadcom BCM2836 SoC
Quad-core ARM Cortex-A7
900 MHz
Dual Core VideoCore IV® Multimedia Co-Processor
Provides Open GL ES 2.0, hardware-accelerated OpenVG, and 1080p30 H.264 high-profile decode
Capable of 1Gpixel/s, 1.5Gtexel/s or 24GFLOPs with texture filtering and DMA infrastructure
1GB LPDDR2
Boots from Micro SD card, running a version of the Linux operating system 85 x 56 x 17mm and is possible to run Windows 10
Micro USB socket 5V, 2A

Raspberry Pi 2 – Model B – ARMv7 with 1G RAM is here – [Link]

1 Feb 2015

keithley

by elektor.com:

We are used to seeing oscilloscopes with built-in features such as function generators, DVMs and spectrum analysers but now Keithley have switched the tables and produced a DVM or ‘Graphical Sampling Multimeter’ with a built-in waveform capture/display feature. The DMM7510 has a 5 inch capacitive touchscreen interface displaying measurements to 7½ digit accuracy and a waveform capture capability of 1Msample/s using an 18-bit digitiser.
According to the data sheet the DMM7510 features a low noise input stage with a 32-bit A/D converter giving the instrument DC accuracies that are typically only available with metrology-grade instruments. The instrument has good sensitivity featuring 100 mV, 10 ohm and 10 microamp full scale measurement ranges.

The meter also includes measuring ranges for capacitance, ACV and ACI, temperature (RTD, thermistor and thermo-couple), 2- and 4-wire resistance, dry circuit ohms, period, frequency, diode test and DC voltage ratio. In addition to the touch screen GUI the DMM7510 includes a USB 2.0 port to store test results and screen images, a HELP key, a rotary navigation/control knob and a front/rear input selector button. The front panel buttons are backlit and Keithley include their Test Script Processor system and SCPI programming mode. This allows test scripts to be run directly on the instrument without the need for an external PC.

Keithley 7½ digit touch screen DVM – [Link]

1 Feb 2015

6627A_HRES

Toshiba has added two new products to their ARM® Cortex®-M4F based TX04 series microcontrollers. The TMPM470FDFG and TMPM475FDFG are both capable of operating two brushless DC motors simultaneously.

The new microcontrollers aim to satisfy ever-increasing demand for more energy efficient motors and incorporate vectoring technology to ensure efficient motor control. The TMPM475FDFG also integrates a CAN (Controller Area Network) controller which is required for use in specialist factory automation systems. Both chips are ideal for a wide range of uses ranging from industrial applications to use in home appliances, such as washing machines, fridges and air-conditioning units.

The TMPM470FDFG and TMPM475FDFG are based upon the high-performance ARM® Cortex®-M4F and can operate at up to 120MHz. They incorporate two modules, each containing a programmable motor drive, 12-bit AD converter and vector engine, ensuring the efficient and simultaneous operation of two brushless DC motors from a single chip.

Toshiba Announces Two New ARM Cortex-M4F Based Microcontrollers – [Link]

 

1 Feb 2015

In this episode Shahriar does an extensive review and teardown of the Keysight (Agilent) MSO-S Series 10-bit 20GS/s Oscilloscope. This scope supports bandwidths up to 8GHz and 400M points of memory per channel. With hardware 10-bit ADCs as well as an ultra low-noise front-end, this scope offers an impressive dynamic range on all four channels. All scope features are software upgradable.

The teardown consists of a close look at the acquisition board and the system blocks diagram. Various elements such as the ADC structure, FPGAs, memory and the time-base are all examines. The scope offers a +/-12ppb time-base with a 100fs jitter noise floor. Some basic performance measurements are also presented such as noise and SFDR.

The wireless experiment shows the performance of the scope in demodulating very low-power signals on an RF carrier. A -75dBm 2.5GHs QPSK signal can be demodulated by the scope. The instrument can also demodulate a 16QAM signal in presence of an interfering signal which is 44dB higher in signal power. All demodulation experiments are performed using the Keysight VSA.

The backplane experiments demonstrate the scope’s capability to perform jitter and noise analysis on multi-gigabit serial links. The built-in equalization software suites are used to find the FFE coefficients and those coefficients are used to perform hardware equalization in an FPGA communication link.

Review, Teardown and Experiments with a Keysight MSO-S Series 10-bit 20GS/s Oscilloscope – [Link]


31 Jan 2015

obr1654_1

Clamp multimeters are not only practical, but also highly safe at measuring a current. One of them is also the compact Voltcraft VC-521.

Clamp multimeter can be marked as an “old known thing”. AT the same it can be said, that this widely spread type of measuring devices is still more compact and new models are usually able to measure all basic parameters.

From this point of view, the VC-521 can replace a common multimeter, as it´s able to measure voltage, current by means of jaws (even the DC!), frequency, duty cycle, capacity (already from nF), resistance, temperature, diodes and continuity. A useful additional feature is also a non-contact detection of AC voltage (100-600V). User comfort is also increased by functions HOLD and REL. The REL function can serve for a classic measuring but also to null the offset at measuring of DC currents caused by a residual magnetism in the jaws – this can temporarily appear after measuring of high DC currents or also by influence of external magnetic field (magnet, loudspeaker,…).

Plastic lug on one of the jaws is in fact a sensor for non-contact AC voltage detection. This lug also enables easier “separation” of a desired wire from other wires – for example at measuring in a distribution box. Maximum reading is 3999, what´s naturally better than classic „1999″.

Basic specs of VC-521 can be found in the attached table and details will provide you the VC-521 user guide. Upon order there´s also available the callibrated version of VC-521.


“Wireless” measuring is always safer … – [Link]

31 Jan 2015

IMG_0092

An autonomous AVR ISP programming device with SD-Card, Nokia display, ZIF socket and standard 6-pin ISP interface:

From project to project the number of hex files on our PC was increasing. Many people send us their virgin ATMegas to get them flashed. And last not least distributing PCB’s and pre-flahed chips via agile-hardware forced us to burn many, many AVRs. In principle this is a work an ape should do but reality was different. So we spend munch time in this boring job. To much time …

Thus it was just consequent to think about a device that would do the job for us. Here is the result, the SolderLab Easy Auto Programmer V1.0. An All-in-one AVR programmer with SD-card, Nokia Display, a ZIF-Socket and a 6-pin ISP interface. With this device the programming of an AVR is done in seconds including the setting of fuse bits (before AND after flashing), flashing the chip, verifying the flash. And all this without any connection to the PC and by pressing just one single button. You just have to put all your hex files into a folder called “hex” on a standard FAT32 formatted SD card, put the card into the programmer an supply it with some voltage (7-20V). That’s it the rest is done by the “ape”.

Stand Alone AVR Programmer – [Link]

31 Jan 2015

LMR16006

The LMR16006 is a PWM DC/DC buck (step-down) regulator. With a wide input range of 4 V to 60 V, it is suitable for a wide range of application from industrial to automotive for power conditioning from an unregulated source. The regulator’s standby current is 28 µA in ECO mode, which is suitable for battery operating systems. An ultra low 1 µA shutdown current can further prolong battery life. Operating frequency is fixed at 0.7 MHz (X version) and 2.1 MHz (Y version) allowing the use of small external components while still being able to have low output ripple voltage. Soft-start and compensation circuits are implemented internally, which allows the device to be used with minimized external components. The LMR16006 is optimized for up to 600 mA load currents.

LMR16006 SIMPLE SWITCHER 60V Buck Regulators with High Efficiency ECO Mode – [Link]

30 Jan 2015

article-2015january-integrated-mcus-enable-cost-fig1

by Stephen Evanczuk @ digikey.com:

Microinverters provide an effective solution to solar-energy harvesting by providing power conversion at the individual panel level. The emergence of highly integrated MCUs offers an attractive approach to microinverter design, providing an option that reduces the cost of complexity which limited widespread adoption of microinverters in the past. Today, designers can build highly efficient microinverter designs using available MCUs from semiconductor manufacturers including Freescale Semiconductor, Infineon Technologies, Microchip Technology, Spansion, and Texas Instruments, among others.

Solar-energy-harvesting systems have continued to evolve away from traditional centralized solutions (Figure 1). Unlike systems based on a single central inverter or even multiple string inverters, microinverters convert power from a single panel. In turn, the AC power generated by microinverters on each panel is combined on the output to the load.

Integrated MCUs Enable Cost-Effective Microinverters for Solar Energy Designs – [Link]

30 Jan 2015

SLIDE01--rcj_Microchip_gesture_EE-Times_Control_1

by R. Colin Johnson @ eetimes.com:

PORTLAND, Ore. — Any embedded device can made to recognize 3D gestures in mid-air, with the addition of the new GestIC from Microchip Technology Inc. (Chandler, Arizona). Microchip supplies all the chips, development software and know-how, it claims, to enable engineers to quickly make any embedded device smart enough to respond to commands drawn in mid-air with your bare hands.

Microchip believes its newest GestIC chip is the most cost-effective gesture detection system available today. “We not only provide the lowest-cost entry point for easy-to-use yet advanced 3D hand gesture recognition,” Fanie Duvenhage, director of Microchip’s Human Machine Interface Division told EE Times, “but by focusing our newest family member, the MGC3030, on the core gesture detection function, we make the software engineers job quick and easy too — using our free, downloadable Aurea graphical user interface (GUI) and Colibri Gesture Suite.”

3-D Gesture Control For Just $2 Per Device – [Link]

30 Jan 2015

DSC_8642

What a CAM Drive can or can not do:

A CAMdrive node must be selected according to the motor.
That is:
Stepper motors need a Stepper Controller of CAMDrive.
Normal DC motors need a CAMdrive-BrushedDCMotor controller.

To connect with Bluetooth, only one node needs the Bluetooth module. The remaining nodes are wired via the bus.

There is only one power supply required! No matter which node is connected, it supplies the remaining nodes and motors on the bus

It does not matter on which node the camera is connected, it all work “Camera” jacks simultaneously.

The bus connection is established via a standard network cable (patch cord).

CamDrive – an open source multi-axis control for time-lapse photography – [Link]



 
 
 

 

 

 

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