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18 Dec 2013

RIGOL DSA1030A is a 9 kHz to 3 GHz Performance Spectrum Analyzer with advanced measurement capabilities. At only $4999 market price, DSA1030A has USB and Ethernet connectivity as well as a VGA outlet.  It features a minimum resolution bandwidth of 10 Hz and comes with an all-digital IF design technology to meet the needs for reliability and precision for some of the most demanding RF applications. DSA1030A offers other optional features such as the Advanced Measurement option attainable for applications either in low noise or in narrow resolution and also a built-in pre-amplifier to help on low level signals. The interface is also comparable to other rated analyzers with a large display at 21.6 cm with a resolution of 800 x 480 pixels that in return allows good viewing and easy navigation.

The DSA1030A Spectrum Analyzer offers readily accessible frequency settings. The span control for functions like zooming in/out or even for zero and full span can be attained readily in one click. All the menus can be set quickly and easily.  The configuration of the analyzer is also made simple. Just access the marker functions, press the marker buttons and you will see exactly what you expect.

One thing about the DSA1030A Spectrum Analyzer is that changing most of its settings in effect also automatically updates the display settings on the screen to match your desired options. The status indicator is readily available and is always on the screen. No matter where you are on the spectrum analyzer, the status indicator is always provided. Correction settings are also integrated to the analyzer to allow file corrections for antenna, cable or similar as long as it comes with the correct format. Data can be corrected by these settings live in real time.

The RIGOL DSA1030A Spectrum Analyzer comes with standard accessories such as the Advance Measurement Kit (AMK) and USB cable and power cord. It weighs 6.2 kg without the optional battery that can be used for portable operation. In addition, it has a user-friendly preset function that enables users to load their previous measurements. With an exceptional market price, it is safe to say that the DSA1030A Spectrum Analyzer can be used for broad electronics applications present today.

RIGOL DSA1030A Spectrum Analyzer - [Link]

17 Dec 2013

obr1454_1

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 2000 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.

The multifunctional gas soldering tool VersaTip 2000JA can be gained with a free gift now – with the 12in1 multitool – it is only necessary to order item no. 131739.

Contents 

  • 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

Gas soldering tool DREMEL 2000 VersaTip now with a gift! - [Link]

16 Dec 2013

bypass_capacitors

Here is an app note from NXP on capacitor bypassing.

Bypass capacitors are applied between the power supply pins VCC and GND of integrated circuits. They reduce both the power supply noise and the effect of spikes on the supply line. They also provide instantaneous current demands of the integrated circuit as it switches. This application note describes the different properties of bypass capacitors and provides a guide to their use.

[via]

Properties and application of bypass capacitors - [Link]

16 Dec 2013

Assembled-4S-Universal-Tube-Preamp

The basis for this tube preamplifier started out as a post in the Super simple single stage tube preamp thread on the website Forum. One of the members (see Mark’s 4S Universal Valve Preamps) had suggested building a Super Simple Single Stage Preamp (“4S” Preamp for short) and there was much discussion concerning various tubes, gain, noise, etc. and several designs were presented using various dual triode tubes. Then the proverbial gauntlet was thrown down with the phrase “switch from 12AU7 to 12AX7″. My answer was to design a universal line stage preamplifier that would work well with an entire range of tubes. Thus was the 4S Universal tube preamplifier born.

4S Universal Preamplifier for 12A*7 Tubes - [Link]


16 Dec 2013

Application:

Make your own computer speaker system.  This simple and inexpensive project will let you set up a small audio amplifier circuit and let more sound out your computer.

Description:

A simple audio amplifier circuit based on the LA4440 IC. This circuit will take your computer’s headphone level output and amplify it to drive a pair of external speakers.  If you are listening to music or movies on laptops and computers, this is a useful little project for you. Laptop speakers are never loud enough to give satisfying listening.  They give users the ability to hear something, but for anything like music or movie soundtracks they are very poor performers. The output from a laptops built in speakers is just too low, and this circuit addresses that low power with some additional amplification.

This circuit uses an LA4440 and some supporting components to give you much more power, while retaining a small package that you can use.  The LA4440 is a dual channel audio power amplifier, with low distortion, and a good frequency range.  Using 2 channels, the LA4440 will output 6 watts per channel, that can drive much larger speakers than a laptop can hold.  When you set up a small enclosure(s), a 12V power supply, and an audio jack connection to the laptop you’ll have a nice enhancement to your laptop audio enjoyment.

Laptop Audio Amplifier - [Link]

15 Dec 2013

 

obr1372_5

Do you need high-quality measuring equipment? Now it´s the right time to profit from a 20-30% discount.

At an occasion of 65-years anniversary of company Fluke, we bring you a special offer of measuring devices sets.

Set no.1
Visual IR thermometer Fluke VT02 + Digital multimeter Fluke 175

Fluke VT02 – revolutionary combination of a thermometer with a visual display (picture in a visible spectrum blended with an infrared one), -10…+250°C, pyroelectric matrix technology, storage to a uSD card

Fluke 175: True RMS, basic accuracy 0.15%, CATIV 600V

Price 695Eur (common price is 894 Eur)/without VAT

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Set no.2
Digital multimeter Fluke 115 + contactless voltage tester Fluke LVD2 + Fluke C90 pouche

Fluke 115: True RMS, AC/ DC current, CATIII 600V

Fluke LVD2: 2 sensitivity levels (already from approx 12.7cm) , 90-600VAC, integrated LED torch, CATIV 600V

Price 189 Eur (common price is 257 Eur)/ without VAT

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Set no.3
Digital multimeter Fluke175 + voltage tester Fluke T110 VDE

Fluke 175: True RMS, basic accuracy 0.15%, CATIV 600V,

Fluke T110: voltage and continuity tester AC/DC 12-690V, LED indicator with 12LED, vibration (tactile) indicator, phase rotation, 30mA test (RCD/FI), IP64, built-in LED torch, CAT IV 600V

Price 199 Eur (common price is 268 Eur)/ without VAT

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Set no.4
DMM Fluke 179 + clamp adapter for AC current measurement Fluke i400

CATIV 600V, True RMS, basic accuracy 0.09%, measurement of current up to 400A/ AC via a clamp adapter.

Price 299 Eur (common price is 399 Eur)/ without VAT

All 3 multimeters (115, 175 and 179) have these features: automatic/ manual range selection, dangerous voltage indicator, analogue bargraph with a great refresh frequency of up to 32/40x/sec, Capacity up to 10000 uF, AC/DC current 10A (20A/30 sec), max. count up to 6000. Mutual comparison will provide you the following document and in this demo you can try some functions of the 17x series.

Top quality Fluke measuring devices for great prices - [Link]

14 Dec 2013

Application:

12V Lead acid battery low voltage indicator, to monitor battery condition during long term storage.

Description:

This is a simple circuit that will indicate a low voltage on a 12V lead acid battery.  Many that have golf carts, small EV’s, RV’s, or solar power banks for homes have a number of 12V lead acid batteries to maintain and this circuit will help protect your investment while not using these batteries.  When stored, batteries will self discharge, and if left for too long, will self-discharge to a damaging level. This circuit will light an LED when the battery voltage decreases to 11.6V.  When the LED turns on, charge the battery to prevent the battery from dying on the shelf.

Only a few parts are needed in the small but useful circuit.  The BC557 PNP transistor controls the lighting of the LED.  The BC557 transistors base is biased by the 10V zener diode.  As long as the battery voltage stays above 11.6V, the zener keeps the base of the BC557 transistor high.  When the battery becomes discharged, the zener stops conducting and the base bias goes low, and BC557 begins conducting, and the LED alerts you to the low battery voltage.  You can use a variable resistor to fine tune the low voltage indication, and/or use a set resistor when you have a good value figured out.

Battery Self Discharge Indicator – [Link]

14 Dec 2013

img_20131210_000844-600x450

fowkc published his latest project the mains frequency display:

I wanted to make a display that could show the mains frequency to 3 decimal places. I’d be using the same seven-segment display modules that I used in my UNIX clock, so all I had to do was design the part that would work out the frequency.

[via]

Mains frequency display - [Link]

14 Dec 2013

Dave celebrates the classic 555 timer IC by building the Evil Mad Scientist “three fives” discrete timer kit. Some scope measurements and an explanation of the internal 555 timer circuitry follow.

EEVblog #555 – 555 Timer Kit - [Link]

14 Dec 2013

DIGITAL CAMERA

Zak Kemble writes:

While working on an update for my CPU Usage LEDs project, I thought why not just make it into a universal RGB LED controller? The CPU Usage LEDs controller took a value between 0 and 255, worked out what colour it should be and then fade to that colour. This was very limiting; changing what colours it used and how it fades required a firmware update. With this universal RGB LED controller the host software does all the work and the controller is simply told what brightness the red, green and blue LEDs should be. To make it as easy as possible to interface with the controller I created a library which deals with all the LibUSB stuff.

[via]

AVR USB RGB LED controller - [Link]



 
 
 

 

 

 

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