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13 Dec 2014

Dave reviews the Analog Discovery 14bit 100MS/s USB oscilloscope and multi-function instrument from Digilent.

It has a 2-Channel Oscilloscope
2-Channel Waveform Generator
16-Channel Logic Analyzer
16-Channel Digital Pattern Generator
±5VDC Power Supplies
Spectrum Analyzer
Network Analyzer with Bode, Nichols and Nyquist plots.

EEVblog #692 – Digilent Analog Discovery Review - [Link]

12 Dec 2014

by TheSignalPathBlog @ youtube:

In this episode Shahriar compares the performance and features of the Siglent SDG5162 and Rigol DG4162 Arbitrary Waveform Generators. Siglent has recently opened a new North America office which would certainly help them bring their instruments to the US more quickly and provide better local customer and sale support.

The Siglent SDG5000 teardown is presented. Aside from various GUI features of these two units, the THD, phase noise and maximum output power of each unit is measured. The ability of the Siglent generator to produce 12ns pulse width independent of the output frequency is also presented with some practical applications. Finally the Easy Wave application us is used to generate some custom waveforms.

Review, Comparison and Teardown of Siglent SDG5162 and Rigol DG4162 Arbitrary Waveform Generator - [Link]

8 Dec 2014

by w2aew @ youtube.com:

This tutorial back-to-basics video discusses the operating point (or quiescent point, Q-point, bias point, etc.) of a bipolar transistor (BJT) circuit, and how the choice of the circuit design can affect how sensitive the bias point will be to the value of Beta (current gain) of the transistor. Ideally, you’d want to use a circuit which is completely independent of beta, so that a wide variety of transistors could potentially be used. Three different transistor bias circuits are demonstrated with three transistors, each with a different value of Beta. The current gain of the three transistors are measured and recorded, and then the resulting voltage ACROSS the collector resistors is measured for each transistor in each configuration. In other words the voltage between VCC and the collector is what is measured and recorded (not the collector voltage with respect to ground).

Bipolar Transistor bias circuits and Beta dependence - [Link]

29 Nov 2014

by  TheSignalPathBlog @ youtube.com:

In this episode Shahriar repairs an Agilent 33250A function and arbitrary waveform generator which does not power on. The unit is equipped with a soft power switch which might be responsible for the fault. After a brief look at the unit’s constructions, the fault is traced to a few possible locations.

The schematic of the soft power circuitry is presented and the internal switching power supply is closely examined. After the fault is located, the repair is presented. The block diagram and operation of a current mode DC-DC switching IC is also presented.

Teardown and Repair of an Agilent 33250A Function and Arbitrary Waveform Generator - [Link]


29 Nov 2014

What’s inside a smart card pinpad EFTPOS terminal?
Dave looks at the anti-tamper mechanisms inside a Sagem Monetel EFT930S

EEVblog #687 – EFTPOS PIN Pad Terminal Teardown - [Link]

19 Nov 2014

EEVblog #684 – Ness SMT Manufacturing & Assembly Factory Tour - [Link]

16 Nov 2014

Webinar introduced UDOO as a powerful single board embedded SBC based on the powerful Freescale i.MX6 chip, which offers complete and powerful platform for your applications.

Looking for a powerful platfom for your Linux applications? - [Link]

31 Oct 2014

In this tutorial Dave explains what a PCB spark gap is and how it can be a useful zero cost addition to your PCB layout to help prevent ESD damage.
He shows how to easily design them into your board and calculate the approximate voltage rating.
And of course has some fun applying 5kV to some gaps to show how them at work.

EEVblog #678 – What is a PCB Spark Gap? - [Link]

28 Oct 2014

Qualmark, world leader in Accelerated Stress Testing has introduced the HawQ, a new, cost-effective, portable solution to your Highly Accelerated Stress Testing needs.

Qualmark HawQ - [Link]

28 Oct 2014

obr1609

SOS Webinar @ 2014.10.29 10:00 – 11:30 CET

UDOO is a powerful single board embedded SBC based on the powerful Freescale i.MX6 chip, which offers complete and powerful platform for your applications.

  • General introduction to the UDOO Board
  • Hardware features
  • Main aspects regarding the creation of projects with it
  • main aspects of creating a Linux or Android project with UDOO boards
  • Examples
  • Q&A

SOS webinar – Looking for a powerful platfom for your Linux applications? - [Link]



 
 
 

 

 

 

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