Test-Measurement (Page 2)

This is an interesting attempt in the right direction. The bandwidth may be only the audio range, but the first instruments with touch interface for tablets are being built for tablets even by DIY Enthusiasts.

SpecScope from NFX Development

SpecScope is a spectrum analyzer and is the second in the line of engineer applications from NFX Development. The SpecScope incorporates the speed and ease of use to access FFT frequency measurements in a hurry.

Some of the Features

  • Logarithmic/Linear measurements
  • Pinch to zoom in both X and Y axis
  • Selectable No. bin for accuracy versus speed
  • Three settings of spectrum averaging
  • Threshold trigger to hold the peak value
  • Tap to pause and resume measurements (graph is still navigational in this mode)
  • A adjustable sample rate allow analysis from 10 Hz to 22KHz

The PC is now an economic and common equipment at home or office. To interface it to the real world is a step in learning Automation and Robotics. In Automation we have both Industrial and Home.

Experimenting with Home Automation and Building PC based Instruments is the first step. An Electronics card needs to be interfaced by Serial, Parallel or USB Ports.

Some Small VB6 Software Source for Virtual Electronic Instruments are available here for Learning and Developing.

You can Read More about it at my Data Interface Circuits section Computer Data Interface

These Programs use a component Inpout32.dll from Inpout32.dll from Logix4u, Obtain the Source code and License.

These Programs are for Experimentation and Educational purpose, Not Suitable for Commercial Applications. The Orcad 9 Student Edition Design Source also given here.

Project Source – virtual-instrumentation – Examples of Computer Interface to Instruments

Toy Logic Analyzer

These are the Theory and Description Pages for the VB Programs with circuits in this project.

  1. ICL7135 Printer port Voltmeter
  2. Millivolt Source R-2R Ladder D/A
  3. Preset Counter Simulation
  4. Very Simple Logic Analyzer

BitScopes are USB or Ethernet connected PC Based Mixed Signal Oscilloscopes. This means they capture and display one, two or four analog signals and eight logic or timing signals, simultaneously. Any BitScope can be used as a Digital Storage Oscilloscope, Logic State Analyzer, Spectrum Analyzer or Data Recorder.

USB BitScope 310

Bitscope – PC Oscilloscopes And Analyzers

BS325 is a classic 2+8 channel BitScope which combines deep capture high performance mixed signal data acquisition and full network connectivity in one compact unit.

BitScope 325 – PC Oscilloscope

BS325 connects via ethernet and is electrically isolated from the host. USB adapters are also available.

BS325 with third party software

BS325 is user programmable, software extendable and can be integrated with third party software.

To make this easy the BitScope Library is available for BS325. The library can be used to create custom applications or to integrate one or more BS325 units into specialised testing and data acquisition systems.

The library is included as standard with BS325 and is compatible for Windows, Linux and Macintosh platforms.

“The library makes it possible to show on the beams of the oscilloscope over a million quantization steps of signal per second (on the Pentium III machine) – less than one micro-second is sufficient for one signal sample. This software can be used for linking to real-time controlling programs as longer delays in relay of data to the oscilloscope don’t occur.”

RT Software Oscilloscope GUI DLL Library

Universal Real-Time Software Oscilloscope GUI DLL Library

“The library is supplied with a comprehensive description of the program interface and simple examples of its use executed in various different program development environments: MS Visual C++® & Visual Basic®; Borland Delphi® & C++Builder®; MathWorks Matlab® & Simulink®, C# (C Sharp).”

“Applied software emitting data to this oscilloscope obtained data via such communications as serial port (RS232, 422, 485), SSI, USB, CAN bus, Ethernet, GRIB (instrumental interface), via custom-made communications equipment and also by collecting information via a data acquisition card with analog-to-digital converters mounted on the PCI bus-bar of a PC.”

delabs Notes –

I am amazed, i did not notice this. I tried it it, not fully, it seems to be quite versatile. I feel this may be useful for hobbists to try out some experiments in oscilloscope and logic analyzer. It would be good if it was Open Source, it may help developing more instruments.

I am not sure about this Library in terms to actual high speed testing or if it may be developed further. But is it interesting.

For students i feel Bitscope offers some nice tools too. BitScopes are USB or Ethernet connected PC Based Mixed Signal Oscilloscopes.

If you are building LED Lamps and Solar powered lighting, a LUX Meter and a Energy Meter is required to measure what has been achieved. One is the Efficiency of Power Conversion and Other is Illumination comparable to the lighting people are used to.

It would be better like a Mains Supply wiring, 230/110 all houses have a 24V DC Bus for LED and Solar and small appliances on power failure. There is no point stepping down and then stepping up the power. The combined efficiency may become like 60%.

ELM – Lux Meter

“The Lux Meter is usually used to measure illumination. The illumination is how level of luminous flux is falling on a surface area.”

From Hobby Hound – DIY Electronics

From – The Electronic Lives Manufacturing

An inductance / capacitance meter by Phil Rice VK3BHR, Almost as published in Amateur Radio magazine, April 2004.

A Surprisingly Accurate Digital LC Meter

Phil Rice – vk3bhr – Home Page

 LC-Meter“The AADE web site gave details of how their design worked and a circuit diagram. This led me to propose a design using their oscillator, but in a slightly different way. Like theirs, mine would measure the free running frequency of an LC oscillator, then successively apply a known capacitance then the unknown inductor (or capacitor).”

Der hier vorgestellte Nachbau des LC-Meter von VK3BHR, Phil Rice, verwendet einen PIC 16F84 und eine Punktmatrixanzeige. Der Messbereich geht in etwa von 0 bis 10 mH für Induktivitäten und von etwa 0 bis 100 nF für Kapazitäten.

LC-Meter nach VK3BHR mit PIC 16F84

HP Archive  – This site is run by Glenn Robb, an Electrical Engineer and HP aficionado. It’s goal is to help others collect, preserve and enjoy vintage HP equipment and literature.

Online Museum of Hewlett-Packard – Ken

“This web site is devoted to the history of test equipment produced by the Hewlett-Packard Company which is now known as Agilent Technologies. I own a huge collection of vintage Hewlett-Packard test equipment, catalogs, equipment manuals, and Hewlett-Packard Journals” –  Kenneth A. Kuhn.

HP’s Instrumentation and Technologies Division became Agilent, Recently Keysight a new firm sprang from Agilent as the Heir to the Scopes, Meters, Oscillators and Counters. So in this blog we are relating to Keysight as the continuation of the old HP tradition of Test and Measurement.
(The present hp is a computer company and agilent a health care firm)

Online Museums of Hewlett-Packard

 

Their first business location in the Santa Clara Valley is the now iconic garage located at 367 Addison Avenue in Palo Alto. Here they manufacture the company’s first product, the 200A Audio Oscillator. Disney Studios becomes interested in the 200A and orders eight to be used in the production of their movie, Fantasia.

Keysight Technologies History

“As the company moves into this decade it undergoes a major transformation. In 2013 Agilent Technologies announces that it will split into two separate pure-play measurement companies. The name of the new electronic measurement company is announced later in the year as Keysight Technologies.”

The HP Garage is a private museum where the company Hewlett-Packard (HP) was founded. It is located at 367 Addison Avenue in Palo Alto, California. It is considered to be the “Birthplace of Silicon Valley”

HP Memory Project – Vintage Hewlett Packard
“The HP Memory Project is, first of all, a collection of vintage Hewlett-Packard hardware, software, documentation and other technical and marketing materials from HP’s early years in the instrumentation and computer industry (beginning in 1939).

,David Jones -Tronnort Technology

PCB Design Tutorial – As published in Silicon Chip magazine Oct-Dec 2003. A very comprehensive three part tutorial on how to professionally design and lay out PCBs. Learn all the tricks of the trade! A ground breaking article.

10MHz DDS Function Generator – A very low cost 1Hz to 10MHz sine/square function generator using a novel “sliding window” display. Based on the Analog Devices AD9835 DDS chip.

alternatezone

Low Cost 20MHz Function Generator – A 20MHz+ Sine/Square/Triangle function generator based on the Maxim MAX038 chip.

PC Based Digital Storage Oscilloscope Adaptor- A simple and low cost PC Based digital storage scope using a novel architecture.

FSM Compiler Based PLC- A simple and low cost Programmable logic controller based on the Finite State Machine concept. Complete with custom compiler software and source code.