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21 Nov 2011

At purchase of any HAMEG digital storage oscilloscope from 7xx,10xx,15xx to 20xx series within this year, you wil gain the serial bus analysis option with a value of 190 EUR for free.

Together with a lot of useful functions which new HAMEG HMO digital storage oscilloscopes feature, HAMEG Instruments (a Rohde&Schwarz company) offers an extra bonus. At purchase of any of the above-mentioned oscilloscopes until the end of year 2011, you will gain the option 2011 for free – a license key enabling to analyse I2C, SPI a UART/RS-232 serial bus. Thanks to this function you can save a lot effort at development or service of devices, which use these communication protocols.

The option HO011 uses analog inputs and the trigger input, thus it isn´t necessary to buy any external logical sond. It offers a real time hardware accelerated decode. Values are displayed colour coded for intuitive analysis and an easy overview. Up to 4 lines are displayed for a comfortable display of decoded values. Decoding is into ASCII, bináry, hexadecimal or decimal format. HO011 also features a powerful trigger to isolate specific messages. You can download the HMO user manual, where you can find the detailed description of serial bus analysing on pages 37-41.

Analyse I2C, SPI and UART/RS-232 for free! – [Link]

21 Nov 2011

Multifunctional gas soldering tool will help you at many various applications like: soldering, melting, hot-cutting, welding and woodburning (pyrography)…

This quality gas soldering tool provides a freedom of usage for example outdoor and everywhere where no electricity is available. But DREMEL VersaTip isn´t only a gas soldering tool with adjustable temperature. It is a multifunctional tool, which you can use, thanks to 6 exchangeable tips, for technical and also creative works like: soldering, melting, hot-cutting, welding and woodburning (pyrography), bending of metals, application of heat shrinkable insulations, releasing of junctions locked by an anaerobic sealant (bearings and screws) and many other.

DREMEL VersaTip can be easily and quickly refilled by a widely available liquid butane (the same as used in lighters) and it has a safety lock mechanism against an accidental turn-on. Detailed description will provide you the VersaTip Instruction Manual.


  • DREMEL® VersaTip
  • Soldering Tip
  • Cutting Knife
  • Hot Knife
  • Flat Wide Flame Head
  • Reflector
  • Hot Blower Head
  • Soldering Tin with Blue Cap
  • Soldering Sponge + sponge box
  • Wrenches: 1 x 7 mm, 1 x 8 mm

Technical specification 

  • Weight: 0,135 kg
  • Ignition: Piezo
  • Burn time: up to 90 min

Gas soldering tool DREMEL VersaTip will provide you a freedom – [Link]

21 Nov 2011

New graphic displays EA DIP122-5 series with efficient LED backlight are optimized for good legibility even in demanding light conditions like for example at the direct sunlight.

Graphic displays EA DIP1222-5 with a 122×32 pixels resolution feature an excellent contrast and an efficient LED backlight offers great legibility even in a low ambient light environment. They are equipped with a temperature compensation for an increased working temperatures range from -20 to +70°C, without necessity of contrast adjustment. Displays also feature a „superfast liquid technology“, ensuring a sufficiently quick response time even at extremely low temperatures (average 2 sec at -20°C).

Three colour versions are available: yellow/green, amber and blue-white. Yellow-green and amber variant is particularly suitable for outdoor usage and extreme light conditions, while an effective LED backlight enables their usage even in a low ambient light environment. Blue-white veriant is optimized with respect to contrast and is ideally suitable for indoor usage with or without artificial light and when low energy consumption is vital.

Displays contain 2 built-in controllers (PT6250 compatible), while every controller is assigned to 61 columns. For external communication an 8-bit interface is used. An external series resistor or constant current source is all that is needed for the LED background illumination. The displays are easily soldered to the printed circuit board or socket connectors can be used if desired. New graphic displays offer for a customer also a high flexibility in a possibility to use a graphic or a character display module for various versions of a given device. As a character display modules types EA DIP081-CHNLED (1×8), EA DIP162-DHNLED (2×16) a EA DIP204-4HNLED (4×20) with the same casing and pinout can be used. .

Further information offers the DIP122-5 datasheet.

You can read DIP122-5 displays even at the direct sunlight – [Link]

21 Nov 2011

New DB9-USB connectors from FTDI enable to use a USB port in devices with UART interface without necessity of a PCB redesign.

By simple using of new DB9 USB connectors instead of original DB9 UART connectors, you can achieve virtually immediately a USB connectivity of your existing devices. If you from any reasons don´t wish to redesign a PCB, then these connectors are ideally suitable for you. Connectors DB9 USB contain a complete USB/UART converter circuit in their bode. So far these connectors were available in the RS232 logic levels version. Novelty from company FTDI are 4 new types supporting also 3.3V and 5V logic levels – DB9-USB-D3 and DB9-USB-D5, with a USB male or female connector.

DB9 USB family now contains 6 types for all 3 the most common logic levels, in a version with Male and Female USB connector. New connectors offer the same utilization comfort like other USB products from FTDI, DB9_USB datasheet and in the AN_149 application note. Free available drivers enable to use DB9 USB connectors as a Virtual COM Port (VCP).

Change UART to USB in an existing device! – [Link]

20 Nov 2011

Company Quectel launches on the market a miniature quad-band GSM/GPRS module featuring reach functionality and extremely low power consumption.

M80 has all features, which we usually require from a modern GSM/GPRS module: GSM/GPRS performance for data, voice, sms and multimedia, powerful Internet service protocols, multiple Sockets & IP addresses. M80 provides a high performance at a very low power consumption and an extended specified temperature range from -35 to +80 °C (with restrictions -45 to +85°C). With the extremely low power consumption and only 2,6mm high LGA package it is suitable even for miniature mobile devices.

M80 is a complete powerful hardware platform for all M2M (machine to machine) applications. As such it can be found in most common M2M applications. Detailed information provide documents M80 Hardware Design, M80 ATC and the M80 datasheet. Also available is the evaluation kit.

Complete miniature GSM/GPRS platform – Quectel M80 – [Link]

20 Nov 2011

grieg.gotdns.com writes:

Apparently I have a thing for testing. I rather love to run experiments, even when there’s no immediate need for the results. I guess I just enjoy trying stuff, and hey, maybe even learning a thing or two.

So last weekend I was doing a bit of tinkering and got to wondering about the performance of different heatsinks. Now just intuitively, I know that larger heat sinks tend to dissipate more heat than smaller ones – particularly if they have larger surface areas. But just how much better is a tall, finned heatsink than a small, clip-on device? This is what I wanted to find out. So I gathered up five sinks of varying sizes and started to design my test.

Compares the performance of several different heatsinks – [Link]

19 Nov 2011

Giorgos Lazaridis writes:

Most of you probably know the popular HD44780 character LCD controller from Hitachi. Usually you find it on LCD display boards with 16 pins. One of these pins is called “Contrast Adjustment” and does exactly this: It adjusts the LCD contrast. This pin requires a voltage level. If a microcontrollers has a Digital to Analog module, then this pin can be directly interfaced with this module. But the D/A module is not very common, instead, the PWM module is.

In such applications, the backlit is usually done with LEDs, so a simple PWM driver can directly adjust the brightness. Unfortunately, the PWM module cannot be directly used to adjust the contrast. So, i made a very simple and small circuit to interface the PWM output of a microcontroller to the contrast adjustment pin of an HD44780 Character LCD.

PWM LCD Contrast Adjustment – [Link]


19 Nov 2011

Normally one tact switch requires one digital input pin of a microcontroller. Some designs implement keypad style multiplexing to get multiple switches on fewer inputs. However, there exist other techniques that allow you to connect many switches on a single input pin of a microcontroller. This tutorial demonstrates one such technique as applied to PIC12F683 microcontroller. In this example, there are four LEDs and four tact switches connected to the PIC12F683 microcontroller. While each LED is controlled through an individual I/O pin, the four switches are connected to one ADC input pin of the PIC12F683 microcontroller.

Connecting multiple tact switches on a single input pin of a microcontroller – [Link]

19 Nov 2011


The Gyroscope Module is a low power 3-axis angular rate sensor featuring temperature data as an added bonus.

Raw measured angular rate and temperature data are accessed from the selectable digital interface (I2C or SPI). The module features a small package design and has an easy to access SIP interface with a mounting hole for quick connectivity to your projects. It is designed for use with a large variety of microcontrollers with different voltage requirements.

Application Ideas:

  • Gaming
  • 3D motion control
  • Virtual reality input devices
  • Robotics
  • UAV, IMU systems


  • 3-Axis angular rate sensor (yaw, pitch, and roll)
  • Supports I2C and SPI communications
  • Three selectable scales: 250/500/2000 degrees/sec (dps)
  • High shock survivability
  • Embedded temperature sensor -40 to +185 F (-40 to + 85 C)
  • Embedded power-down and sleep mode
  • 16 bit-rate value data output
  • 8-bit temperature data output

Gyroscope Module 3-Axis L3G4200D from Parallax – [Link]

19 Nov 2011

This new tool from TI helps you design the power stage of the most commonly used switch mode power supplies. It is also a useful aid to greater understanding of voltages and current flows inside converters – [via]

TI Power Stage Designer Tool 2.0 – [Link]





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