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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 received a micro:bit from element14. My first project is to turn it into a LabVIEW test device as a pass and fail indicator.   It will perform two functions: display an or if a test passes or fails. A physical indicator for the test operator. ...
I got home on this past Friday evening, having a really bad day of "STUPID PEOPLE" at my VA Hospital in Dallas, and found a package outside my door. After I opened it I found a T-shirt, silver antistatic bag with something in it, batteries, and battery holder. Well after poking around in the bag I couldn't realize I got it for this entry. And after a while, the lights came on. My VME rack system is still a ways away, so I will use this SBC to do the lifting by substituting TI 2x sixteen-bit i2C ...
Last night I woke up about 4 AM and realized that I don't have to use any Arduino(s) for the Cable Tester.   I remembered that I had picked up a VME chassis with a bunch of Rotec I/O cards. The final configuration will  be 256 channels (half input and half output)  So here what I'm going to do. Parts: 32 channel Output Card(s) DIG 32-Ok (I have 4 of them) 32 channel Input Card(s) DIG 32-IS (need 4 and I have 6 of them) Interface Cables RTC-K-049/4M (need 8 and I have 10 of them.) ...
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   Examples of a mess! As I have said before I love flight simulation but the cables well it gives me a big headache. Some cables are downright ugly! And the worst ones don't have any pinout. Want List (Dream Big): Hardware Expandable /  Software Ex ...
dubbie

TinyDVM#2

Posted by dubbie Oct 15, 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   I used the Arduino MKR 1010 WiFi controller for the TinyDVM, mainly because I had one and I wanted to try it out. After looking at several OLED displays I settled on the SparkFun Micro OLED breakout board. It seemed to have a reasonable size display and b ...
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 Project14 blog is about turning a BBC micro:bit into a test instrument. I call this a micro:bit of sense system or µBOSS. The micro:bit already has a nice set of sensors but they aren't very easy to read on the built in LED display, so I thou ...
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   Links to previous blog posts: "No lies" IR Thermometer - part I "No lies" IR Thermometer - part II "No lies" IR Thermometer - part III This is part IV   I have described and showed the custom built IR thermometer so far. It doesn't look perfect ...
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   We can use use simple voltage divider at micro:bit ADC input to measure DC voltages but using this method we can only measure large voltages with fair bit of accuracy. What about small voltages in range of few Milli or micro volts. One way of tackling su ...
dubbie

TinyDVM#1

Posted by dubbie Oct 6, 2018
I wanted to do something with OLEDs (organic LEDs) as I have never used any of them and I wanted to find out more. After some research it seems that they are tiny display that are quite bright. So, after a while thinking about how they could be used to make a test instrument I decided why do make small digital volt meter (TinyDVM). Existing DVM s are cheap and accurate but it seemed worth a go at making a smaller one. I want to use Arduino and I have a 3D printer so I will try to make a complete ...
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   We can easily find many types of digital optocouplers but its very rare to see any analog optocoupler application especially in hobby electronics. Even though its very essential in many type of analog circuits especially in current and voltage monitoring ...
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   Arduino or any other controller need TTL signal levels at input to count pulses and only work with square wave. So what if we want to find out the frequency of sine ,triangular or low voltage square wave?   We can solve this problem with the help ...
rsc

MinMax - Calibration Box

Posted by rsc Oct 2, 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   When working with data acquisition systems, many times a signal doesn't behave as expected.  When diagnosing the problem, it's nice to have a reference voltage to test your inputs. I made up this quick "MinMax" test box for quickly testing analog i ...