Wednesday, November 09, 2016

Logisim -Simulate Digital Logic Circuits

Logisim is an educational tool for designing and simulating digital logic circuits. With its simple toolbar interface and simulation of circuits as you build them, it is simple enough to facilitate learning the most basic concepts related to logic circuits.

Logisim -Simulate Digital Logic Circuits

Logisim -Simulate Digital Logic Circuits

With the capacity to build larger circuits from smaller subcircuits, and to draw bundles of wires with a single mouse drag, Logisim can be used (and is used) to design and simulate entire CPUs for educational purposes.

Some Features
  • The wiring tool draws horizontal and vertical wires, automatically connecting to components and to other wires. It's very easy to draw circuits!
  • Circuit layouts can be used as "subcircuits" of other circuits, allowing for hierarchical circuit design.
  • Included circuit components include inputs and outputs, gates, multiplexers, arithmetic circuits, flip-flops, and RAM memory.
  • The included "combinational analysis" module allows for conversion between circuits, truth tables, and Boolean expressions.

Sunday, November 06, 2016

Tuxgraphics AVR Microcontroller

You will find tutorials on how to build your own avr programmer, a digital DC power supply, a tiny web server, an ethernet weather station, usb slide show presenter and lots more.

Tuxgraphics AVR Microcontroller

digital DC power supply unit - A very small an really good DC bench power supply unit for your hobby lab. It has lots of features which you normally find only in very expensive power supplies. This one is affordable, small and easy to build.

Temperature and humidity measurements with the AVR web-server - Just add this one SHT11 sensor. No other components are needed to measure temperature + humitidy + dew point.

Mini 3 digit display, a small and inexpensive voltmeter module - We build a simple and inexpensive three digit display. It's a voltmeter module but it has also gerneral purpose digital IO pins.

Tuxgraphics AVR Microcontroller

Explore the world of avr microcontrollers and DIY electronics stuff. Microcontrollers and other electronic project kits and  parts.

Friday, November 04, 2016

AVR and ARM based Industrial Systems - ConTeK

Embedded Systems using ARM and AVR processors. In Industrial Process and Machine automation.

AVR and ARM based Industrial Systems - ConTeK

Engineering Services offered include technical support like design, calculations and realization. Development of electronics, control and software visualization systems to OEM's like Manufacturers of industrial machines or their parts.

AVR and ARM based Industrial Systems - ConTeK

CTB03 - Procesor unit with AVR 16MHz

 is small and cheap single board control system suitable for machine control where processing of small amount of signals is needed and where size of application program is less than 128 kB.
Some Specs
  • Wide range of power supply voltage 15-27 VDC
  • ATMEL AVR processor
  • 2KB nonvolatile FRAM for data storage
  • Battery-backed realtime clock
  • 16 digital inputs 24 V
  • 16 digital outputs with transistor switches
  • RS232 and CAN bus
  • 4 analog inputs and 4 analog outputs.
  • 2 inputs for direct connecting of load cell
  • 2 inputs with selectable range 0-5 V or 0-10 V
ConTeK Ltd.
V Zavetri 6/1478, 170 00 Prague 7, Czech Republic

Friday, October 14, 2016

High Efficiency Step Down Isolated Supply

60W AC-DC adapter, synchronous rectification, fixed frequency current mode PWM controller. Very Low Quiescent Burden, Efficiency above 85%. That's Green.

STMicroelectronics - EVALSTSR30-60W. Synchronous rectification using L6668 and STSR30.

EVALSTSR30-60W: 60W AC-DC adapter
EVALSTSR30-60W: 60W AC-DC adapter

The converter works in both Continuous and Discontinuous conduction mode depending on the input voltage (the circuit has a wide input voltage range) and the output load. The 68-kHz switching frequency provides a good compromise between the transformer size and the harmonics of the switching frequency, optimizing input filter.

High Efficiency Step Down Isolated Supply

The input section includes protection elements (varistor, fuse and NTC for inrush current limiting), a standard Pi-filter for EMC suppression, a bridge and an electrolytic bulk capacitor as the front-end AC-DC converter. The transformer is a layer type, uses a standard ETD34 ferrite core and is designed to have a reflected voltage of 95V. The power MOS is a 700V - 1Ω and a transil clamp network is used for leakage inductance demagnetization.

From STMicroelectronics

Wednesday, October 12, 2016

EMI RFI - ElectroMagnetic Interference

Electromagnetic interference (or EMI, also called radio-frequency interference or RFI when in radio frequency) is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.
Electromagnetic interference Wiki

Vertical polarized VHF- UHF biconical antenna

Vertical polarized VHF- UHF biconical antenna
170 – 1100 MHz with omni directional H-plane pattern

Who would know better about Radio Frequency Interference and ElectroMagnetic Interference more than the Hams or Amateur Radio Community.

If they have to communicate effectively using limited resources, they have to deal with EMI/RFI effectively, While they build their equipment or combat Noise from other Machines and Installations nearby.

This problem needs more practical involvement and experimentation to learn, compared to learning something like Digital Electronics.

Equipment and Electricals like SMPS, AC/DC Drives, Motors, Solenoids and CFL Lamps are to be built/reinforced for low EMI/RFI emission/radiation.

Sensitive Medical Equipment like ECG or even a Aircraft can be seriously affected by Noise.

Radio Frequency Interference (RFI)

Sunday, October 02, 2016

Rambus - IP Provider - Semiconductors

Technology licensing company. Manages and Provides Licenses to IP Intellectual property and Patents of semiconductor Technology. Founded in 1990.  XDR, DDR3, RDRAM and FlexIO are some of the Technology Solutions from Rambus.

Rambus - IP Provider - Semiconductors

"Beginning with edge-lit back lighting, Rambus has pioneered light guide-based design solutions for a broad range of LED lighting applications, enabling a new level of styling, efficiency and control of light."

LED lighting technology - Rambus

LED lighting technology

Rambus' lighting solutions enable manufacturers to use fewer or lower-cost LEDs in their general lighting products while delivering superior light quality and output.

Friday, August 12, 2016

NXP Semiconductors - Electronic IC Devices

NXP Semiconductors brings you a broad portfolio of advanced, trendsetting standard ICs products. they include standard and specialty Logic, I2C Logic, innovative Interface products, Microcontrollers, Analog, and RF.

NXP Semiconductors - Electronic IC Devices

They also have Discrete and Power Semiconductors like MOSFETs, Thyristors, Bipolar transistors and even Diodes.

NXP creates semiconductors, system solutions and software that deliver better sensory experiences in mobile phones, personal media players, TVs, set-top boxes, identification applications, cars and a wide range of other electronic devices.

Solutions in RF Identification, Power management Chips, Connectivity and for HandHeld Devices.

NXP (for Next eXPerience) Semiconductors is the name for the new semiconductor company founded by Philips.

ADC1x13DW1 Demo board from NXP

ADC1x13DW1 Demo board from NXP

"NXP's ADC demo board is suitable for dynamic performance evaluations from low to high IF configuration. The FPGA eases the evaluation and analysis of the ADC dynamic and enables use of the full JESD204A feature set"