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Thursday, August 08, 2019

Accelerometers in Electronics

An accelerometer is a device that measures non-gravitational accelerations. These are accelerations produced by mechanically accelerating the accelerometer via its casing. Accelerometers can be used to measure vehicle acceleration.

Accelerometers can be used to measure vibration on cars, machines, buildings, process control systems and safety installations. They can also be used to measure seismic activity, inclination, machine vibration, dynamic distance and speed with or without the influence of gravity. - Accelerometer Wikipedia

Accelerometers in Electronics

MMA7260Q is a 3-axis accelerometer  from Freescale Semiconductor. This accelerometer can be used with an extension Library Mma7260q which simplifies some initialization values and tilt detection.

ADXL105 Lower-Noise Wider-Bandwidth Accelerometer - The ADXL105, a near-ideal kind of vibration sensor, eliminates significant problems with existing vibration sensors, such as piezoelectric and bulk capacitive sensors. Primary benefits derive from much lower cost, stable sensitivity as a function of frequency and temperature, ruggedness, and ease of use. Besides machine health and condition monitoring, it is particularly well suited for noise and vibration cancellation applications.

A beginner's guide to accelerometers - By measuring the amount of static acceleration due to gravity, you can find out the angle the device is tilted at with respect to the earth. By sensing the amount of dynamic acceleration, you can analyze the way the device is moving.

Society of Robots' tilt to servo control app - How does it work? Inside an accelerator MEMS device are tiny micro-structures that bend due to momentum and gravity. When it experiences any form of acceleration, these tiny structures bend by an equivelent amount which can be electrically detected

David T.'s motor balancing experiments - Using an oscilloscope to measure AC vibration signals generated by an accelerometer (from Dimension Engineering).

Digital and Embedded Systems Design

An Embedded Microcontroller or DSP system is made of Chips, Circuits and Firmware. The digital voltage levels, speed, bus width, fan out, power consumption are some factors that a designer has to keep in mind. As portable and wireless gadgets are becoming more popular, RF, Ethernet and Energy Efficient Design aspects should be studied. Power electronics and Analog Circuits knowledge is used around the system, all this is integrated to make an instrument, equipment or gadget.

Microcontrollers are digital chips that derive their intelligence from the firmware program that a user loads into it. Tiny Logic and Math elements simulate Digital Logic according to the programmed instruction to obtain a desired result. Having an equivalent math or logic circuit for the same result would take enormous space, cost and effort. I cover this subject in Embedded Systems

Embedded Systems Design

Microprocessors and Microcontrollers

Analog devices like transistors and diodes lead to opamps and analog computing. This takes more parts but with fast devices can be real time. Then came Logic and Digital Circuits, here also big systems will take too many parts. A very Old hp Logic Analyzer instrument, could be HP1600A, had more than five large PCBs, Toggle Switches and numerous 74Fxx TTL Chips. I tried to revive it, it could not be fully restored.

Microcontroller - 8051, 8052, OpCodes, Analog and PC Interface.

Then came the solution the Microprocessor. Here the entire system goes into the firmware and a Hardware Tool Set in the Microprocessor made up of Logic and Math is sequentially used to perform the same operation that would require innumerable Gates in a plain hardware digital circuit. But as it performs the operations one after another, it takes time and is defined by the CPU Clock Speed.

When the External RAM and EPROM and other peripheral devices moved into the main package, MicroController were born. When more external devices merged with the MicroController. It formed a nearly complete computer, this is known as the SOC.

Sunday, August 04, 2019

Software and DSP technology - softDSP

A Korean Company with ASIC Chip design and Software Development Expertise. Some products developed include 3GPP compliant Turbo decoder ASIC/IP core and 200MHz bandwidth 5GS/s equiv. Sampling rate Digital Storage Oscilloscope.

Software and DSP technology - softDSP

With SoftDSP's expertise in high speed analog/digital signal processing and computer applications, SDS 200A combines all the traditional benefits of the DSO from 200MHz bandwidth, 5 GS/s equivalent sampling to advanced triggering options (Logic, Pulse and Delay)

Software and DSP technology - softDSP

SoftDSP's proprietary variable gain amplification architecture boosts SDS 200A’s analog bandwidth up to 200MHz, with only 2.5 Watts supplied from USB. According to Nyquist Sampling Theorem, one of the most important rules of sampling, the highest frequency which can be accurately represented, is one-half of the sampling rates.

In practice, however, given errors in digital signal processing, the range of frequencies needed to faithfully record an analog signal is one-fifth the sampling rate. So reconstructing a 200MHz signal demand more than 1GS/s sampling rate. Overcoming these physical restrictions, our 200 ps-resolution Time-to-Digital Converter (TDC) technology implements on the 5GS/s equivalent

Wednesday, July 10, 2019

armStoneA8 – A PicoITX ARM SBC

armStone, Single Board Computer in PicoITX form factor.  For solutions with Computer on Module (COM), which need a base board, a Single Board Computer (SBC) in an established form factor offers an alternative.

armStoneA – A PicoITX  ARM SBC

armStone offers all common interfaces (via standard connectors or multi-pin connector). A display can easily be connected via a LVDS interface. Also, a further display/ screen interface via (e.g.) DVI is available. The PicoITX form factor is perfectly constructed for small, but powerful applications.

armStoneA8 – A PicoITX  ARM SBC

With a size of 100 x 72 mm, this PicoITX form factor is suitable for compact devices, as well as for portable ones. All standard bushes are lead through the long side and therefore can be placed at the back of the body. armStone has a Single Supply of 5V. Depending on the CPU, the power consumption can only be a few Watt, making it possible to run the armStone without fan or cooling element.

F&S Elektronik Systeme GmbH
Untere Waldpl├Ątze 23, D-70569 Stuttgart, Germany.

Tuesday, July 09, 2019

PSoC FirstTouch Starter Kit - CyFi Low-Power RF

This intuitive starter kit allows you to evaluate the PSoC programmable system-on-chip and CyFi Low-Power RF in CapSense touch-sensing, temperature sensing, and light-sensing applications.

PSoC CY3271 Kit - Cypress

It also features the PSoC Designer IDE and Cypress's Sense and Control Dashboard.

PSoC FirstTouch Starter Kit - CyFi Low-Power RF

The kit contains:
  • One PC dongle with RF
  • One RF expansion card with power amplification for long-range applications
  • One multifunction expansion card
  • Two battery packs (2xAAA and CR2032)