Hobby Projects - Insulation tester, LED Circuits, Meters.
Showing posts with label Test-Bench. Show all posts
Showing posts with label Test-Bench. Show all posts

Wednesday, November 13, 2013

Raspberry Pi BitScope

A fully integrated Test bench based on Virtual Instruments - mixed signal oscilloscope, logic analyzer, spectrum analyzer and waveform generator using BitScope connected via USB or Ethernet to the now very popular Raspberry Pi.

Raspberry Pi BitScope

Regardless of which BitScope you choose, the new BitScope Library is also available making it easy to create your own embedded test, measurement or data acquisition applications using BitScope and Raspberry Pi. Program in C/C++, Python or Pascal using an easy to use programming API.

 Raspberry Pi BitScope

BitScope Model 10 - World's Smallest Mixed Signal PC Based USB Oscilloscope!

BitScope Pocket Analyzer. It's a problem solver that fits in the palm of your hand. Perfect for designing, prototyping and debugging!

It has 100 MHz bandwidth, up to 40 MSps logic, simultaneous waveform and clock generation and offers serial control of connected devices.  It's the ideal tool for prototyping analog electronics projects, digital and logic circuits or Arduino, Raspberry Pi and other microcontroller based systems with busses, sensors, servos and I/O.

Sunday, October 27, 2013

DSO Nano - Digital Storage Oscilloscope

DSO Nano v2 is an Open Source Portable and lightweight Digital Storage Oscilloscop that has a Color display and is designed for basic electronic engineering tasks. Its palm size and handy features make it great for in-field diagnosis, quick measurement, and hobbyist projects. Schematics and source code files are also openly available for re-innovating.

DSO Nano -  Digital Storage Oscilloscope

Auto measurement - Useful for quickly exploring signal characteristics. Measurement options include frequency, cycle time, duty cycle, peak voltage, RMS voltage, average voltage and DC voltage. Please note that frequency, cycle time and duty cycle can only be measured while triggering. 

DSO Nano -  Digital Storage Oscilloscope

Features - Waveform storage and playback, 6 triggering modes, 200Khz Analog Bandwidth, Complete measurement markers and signal characteristics. Built-in Signal Generator too.

User Interface Overview - The screen is broken into a central display area and 3 operation bars around it. The menu on the top provides the most frequently-used adjustments to signal display. The status bar on the bottom provides precise measurement results and monitoring status. Adjust more advanced functions with the column of function icons on the right.

Saturday, September 28, 2013

Bluetooth Multimeter - Seeed Studio

"Bluetooth Multimeter is an intelligent peripheral of android phones, specially designed for engineers. Not only can it easily collect data such as voltage, current and resistance etc., this multimeter can also communicate with phones via bluetooth. Thus, the data gathered will be displayed on your phones."

Bluetooth Multimeter - Seeed Studio

Totally open source, including hardware, software & Android API. Learn how to create a Platform to connect smartphones with the real life.

Bluetooth Multimeter - Seeed Studio

The Bluetooth Multimeter is based on Atmega328 - Arduino Pro. It measures the voltage and resistance and current input from the headphone jack, and then sent these data via the Bluetooth frame.

Android UI for Bluetooth DMM

This Bluetooth Multimeter is a portable multimeter, a device that gathers the voltage, resistance and current. and then sent these data to other device via Bluetooth, so, we could display the data through other devices, such as Android, PC and so on.

Friday, September 20, 2013

The DMM or Digital Multi Meter

Digital Multi Meter - New Year Resolutions Fluke Electronics - DMM
  1. I will not drop the DMM from a height of 4 feet.
  2. I will not Test Live Powered equipment in the Ohms Mode.
  3. I shall not Measure Mains Voltage in The Current Mode.
  4. I shall get it calibrated once a year or at least once a decade.
  5. I shall not use it in High Energy Measurements.
  6. I will try my best not to give it to my best friend.
  7. I can remember Red is Positive and Black is negative.
  8. I will wear shoes and stand on a block of wood while i test.
  9. I shall not operate the rotary range switch at high speeds.
  10. I shall replace the probes-cables-connectors on wear-tear.
  11. I shall not accidentally keep the hot-iron near the DMM or leads.
  12. I shall not keep DMM on tall table and pull it with the leads.
DMM - How it Looks ... shown right is from Fluke Electronics
 
How To Learn Electronics :

Theory must be studied once and referred to, again and again as you do practicals. One is by building DIY projects and then modifying them. Also Repair of equipment, troubleshooting, testing and calibrating. Then you know how components behave and real life limitations. Now design and engineer a product and test it at customer site. do a pilot production and test with more clients. Now you will learn to think based on practical applications.

"with hard work and innovation you can do it ! "  Solderman Talks 1702 AD

- Solderman Talks 1702 AD

Tutorials on Basics and Instrumentation Electronics 


More About DMM

Friday, May 18, 2012

Measureall Workbench Test Instrument

This was a Student Project of mine, it is a very basic instruments that could do most of the tasks on a test bench.

The cabinet used, was available as a part of a Hi-Fi DIY System, The Range and Mode switches were Modular Stackable Interlocked MultiPole Switches. The rest of the Interface were wirewound pots, jacks, sockets and plugs. The front panel was Engraved Acrylic, the panel was the toughest issue we tackled.

I wanted it to look well engineered, at least on the outside. It was a total analog instrument except for the digital indication of ICL7107. Thanks to 'Intersil Hot Ideas' Applications Book.

The above belong to an instrument Measureall shown below.

MeasureAll Benchtop Instrument

Monday, December 12, 2011

High Resistance Meter

I don't remember if this circuit worked properly. But a few were made and i might not have shown the modifications that were done to make it work. This was meant to be a portable, low cost, insulation tester for an electrician. If you try it out and debug it it may work well.

A negative voltage is derived by shifting gnd with two diodes, i feel this did not work very well. Two pins of CD4028 pins are also used to boost the reference to get two extra ranges as 4051 has a 100E on resistance.

High Resistance Meter

The 555 clock makes 4029 counter count. But the clock can be clamped to gnd by a TL062 window comparator. The clock is frozen when the input value to comparator pin 5-2 is within a lower limit and upper limit "window" pin 3-6.

The 4029 counter BCD is decoded to decimal by 4028 which drives the LEDs, keep LED drive within 3mA or chip will be loaded. Use high efficiency extra-bright LEDs.

The 4029 BCD also controls a shunt resistor array with CMOS switches 4051. The voltage across shunt is a sample of leakage current. This is compared in the window comparator to freeze the Clock and LED display to give a reading of the leakage current or Insulation Resistance.

Friday, July 08, 2011

Gabotronics – Oscilloscopes and Embedded Kits

Designs and manufactures embedded systems. Specialized in 8-32 bits microcontroller projects, instrumentation and data acquisition, PCB Layout, custom electronic designs and engineering consultation. Based in Palmetto, FL.

Gabotronics - Oscilloscopes and Embedded Kits

COMA+ The All in One Instrument, will enhance the original specifications, like using a TFT display and using a few external ICs to simplify the design, like the ICL7135 multimeter IC, and a DDS to generate the waveforms, probably the AD9833.

Is it a Calculator, Oscilloscope, Multimeter, Analyzer….; No it is The Coma+ .

Gabotronics - Oscilloscopes and Embedded Kits

Some Features

  • 2 Channel, 8bit 16MSPS Oscilloscope
  • FFT on acquired data
  • 8 Channel Logic Analyzer
  • Arbitrary Signal Generator
  • Frequency Generator
  • Multimeter:
  • Volt Meter, 1 M ohm Input impedance

Coma+ - An Instrument that propels an Engineer to a Superconscious State, It is under development. It was preceded by Coma an instrument capable of performing multiple tasks, data acquisition, signal generation and multimeter.

Monday, June 27, 2011

LC Meter PIC 16F84 - Phil Rice VK3BHR

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

"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)."

LC Meter PIC 16F84

LC-Meter nach VK3BHR mit PIC 16F84

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.

Thursday, March 24, 2011

OscilloScopes for the DIY Enthusiast

Here are some Hobby Scopes that might even be quite professional if you develop them further. They are virtual instruments. Making Scopes with tablets may be much more easy now.

The µSCOPE - A poorman's oscilloscope
The oscilloscope is still one of the most important measurement tools of the electronic engineer. With the advent of the often very reasonably priced USB scopes, such an instrument is now within reach of every body.

OscilloScopes for the DIY Enthusiast

Digital oscilloscope - Build a simple Inexpensive digital oscilloscope. Single channel, about 100 MSPS. RS-232 based.

xoscope is a digital oscilloscope using input from a sound card orEsounD and/or a ProbeScope/osziFOX and will soon support Bitscopehardware. Includes 8 signal displays, variable time scale, math,memory, measurements, and file save/load.

xoscope - digital oscilloscope for Linux

MHZ100Q is a low cost FPGA-based high speed data acquisition system. Version 2 is a standalone board containing 2, 100MHz 8-bit A/D channels, preamp, 7th order elliptical antialiasing filters, and a Xilinx FPGA.

MHZ100Q - Open Source FPGA-based 100MHz A/D

A USB interface is implemented in the FPGA firmware. Power comes from the USB bus. Schematics, VHDL and Verilog source code, and signal capture and display software are available and being posted.

Sunday, September 27, 2009

Dial based Analog Multimeter

In those days small firms used to make DPM's digital panel meters with 7107. In 1987 when i got a opportunity to design a DPM for a firm, I put the 555 clock in place CD4009 clock shown in intersil, to derive the -5. I created this design to study Eagle Editor. It is not tested by me, but all concepts/modules have been used by me in my designs earlier. It ought to work with some tweaks.

Analog Dial AVO Amps-Volts-Ohms meter

Analog Dial AVO Amps-Volts-Ohms meter

 This was designed, keeping in mind, that sometimes we have few components available and we could be flat broke. Even that you could not carry your DMM somewhere, but you have to make some instrument for a quick need with what is available. If you are out of cash or feel like Robinson Crusoe, then this is a low cost measurement system.



ESI Electro Scientific Inc. 250 DA Impedance Bridge

How they used to measure with Precision before the advent of new technologies..... See the Instrument above. If you can afford it, buy it as a Lab God. Something you can worship before every new project. Its Presence itself will make you bow a few times before this "Stupendous Excellence". What Dignity and Bearing at this age, they don't make this kinda things no more.

ESI Electro Scientific Inc. 250 DA Impedance Bridge

Friday, September 25, 2009

Easy to Build Lux Meter - ELM

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.

ELM - Lux Meter

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."

Tuesday, January 13, 2009

Zelscope Sound card oscilloscope

Zelscope is a Windows software that converts your PC into a dual-trace storage oscilloscope and spectrum analyzer. It uses your computer's sound card as analog-to-digital converter, presenting a real-time waveform or spectrum of the signal - which can be music, speech, or output from an electronic circuit.

Zelscope Sound card oscilloscope

Zelscope features the interface of a traditional oscilloscope, with conventional gain, offset, timebase, and trigger controls. As a real-time spectrum analyzer, Zelscope can display the amplitude and phase components of the spectrum.

Zelscope Sound card oscilloscope

The typical input voltage should be about 1 volt AC at the line-in jack of the sound card, so a voltage divider or a buffer amplifier is highly recommended.

xoscope for Linux - Similar Ptoject

Zelscope also allows for an easy measurement of short time intervals in mechanics experiments. Zelscope has proven useful in debugging music and sound processing software.