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Test Instrumentation

30 posts
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Project PITS has moved forward since the initial prototype was seen to work.   Since deciding that the best place for the on / off switch was between the charger and the boost circuit, the pre-manufactured board could not be utilised. The circuit h ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Since I'm late to the party, I'm just going to do a quick proof of concept implementation rather than a fully developed tool.  I'll continue to develop the tool to fit future requirements.   Hardware: I decided to make the tool modular to mak ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   I had proposed using a Micro:bit to control a programmable current sink to implement an VI curve tracer for the November Project14 DIY Test Instrumentation competition.  Unfortunately, I had some personal issues that prevented me from being able to ...
Well here is my VME rack on the right. This is my Test Rack, it really does not hold all the cards, I need another 2 cards. The CPU is working and has been tested. The blank slot in the bottom is for an IDE controller with the drive cable coming out of the front panel. Rotech STILL has not gotten back to me. Bummer. I only have one Mega that I was not using and it has the female headers soldered down. And I can not wire wrap to it, therefore I have no way of connecting my Arduino Mega to my DB- ...
Related Post: Precision analog opto-isolation amplifier using HCNR200/201   Hardware Setup: Tab Label Tab Content MAX. and MIN. OUTPUT Maximum and minimum possible output voltage are limited to integrate it with microbit analog input and to avoid any damage to microbit. Maximum output voltage will not exceed microbit analog input maximum limit 3.6V and similarly minimum output voltage will not go below 0V even if negative voltage is applied at the input.   MAX. OUTPUT   MIN. OUT ...
three-phase

Project PITS

Posted by three-phase Nov 13, 2018
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Introduction   PITS is a Pickup Indicator Test System I am developing for use with injection test sets on older electronic analogue designed protection relays. This concept is not original, Omicron have such a product for use with their test set. The ...
jc2048

A Transistor Load

Posted by jc2048 Nov 13, 2018
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Introduction   What to do for my Test Instrumentation project? I decided that I'd do a constant-current load but, to be a bit different, mine doesn't include an op amp to control the loop. Op amps are for wimps - I'm going for the hard stuff - a ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Having decided to have a go at making a web user interface for the TinyDVM I looked at a number of web pages and example programs for the Arduino MKR 1010 Wifi, being surprised to find that there were not that many. There is the official (I think it was ...
Ok so time is ticking on by so I am reducing the complexity by only using an Arduino Mega R3 with two 16 bit i2C expanders. This will achieve my short-term goals of 25 x 25 matrix with the flying probe. This will not be client/server, nor use configuration files. But it will get the job done and gives me my flying probe. All I have to do is wire it up the code is written for the most part. But I still have to write the flying probe code. Sorry for the mess in the wiring, blame it on Fritzing. ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   This is the prototype for an inexpensive but reasonably accurate meter for measuring resistance in the milliohm range. The development was documented in detail and links can be found at the bottom of this post.  The prototype is functional but still ...
I just purchased myself a small bench power supply for low current and low voltage applications, mainly for digital designs, to use at 3.3v and 5v. As I browsed the selections on CPC Farnell website I did the usual scope creep in specification and price before winding back down to a nice little Duratool unit, the D03232 https://cpc.farnell.com/duratool/d03232/power-supply-1ch-15v-2a-adjustable/dp/IN07999 The unit is extremely lightweight and compact and sits well on my shelf, which is only 2 ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   As it turned out, programming the graphical display for the TinyDVM was easier than I thought and I was able to get a working version in only a couple of hours, as can be seen below.     The OLED display is both graphical and text at the sam ...
Ok, so the work continues on three fronts. BBC microbit no guts no glory. Underpowered, Lack of any real I/O, Banana Plugs that don't fit into the holes - Almost Trash. Arduino, found the code, for a self-contained cable tester, but has no flying probe and no easy configuration changes. VME possibility of a finished client. Trying to decide to run Intel or Sun Sparc. Found a Zycom DID 6U board with 64 bits of random  Digital I/O, Rotec gmbh seems like they just want to ignore me. Maybe ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Few days ago I have received package from element14 with micro bit. I would like to say thank you to element14 for chance to test this small device. I have decided to create a simple example of usage micro bit to measurement of resistance. I have ...
Test Instrumentation Enter Your Electronics & Design Project for a chance to win a Grand Prize for Originality, a Tool Set, and a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   Just for fun I thought I would consider various colours to spray the 3D printed case for the TinyDVM. The 3D printed colour of white is OK but I thought it might look better with some alternative colour. So I tried yellow and black sprayed onto the first ...