Skip navigation
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 Extensible Uses Scripting Language for configurations, like LUA or XML Client / Server Model (Client is the box, Server a Linux PC) Should start with 2x 25 pins this will give me DB25, DB15, DB9, RJ45, and others. I2C for expansion. Should h ...
dubbie

TinyDVM#2

Posted by dubbie Oct 15, 2018
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 because it was supplied as a breakout board it was easy to prototype. It has a graphical display so I can try out different sizes of text display to see which is best. There is also the added possibility of being able to use some sort of graphica ...
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 ...
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   Blog posts: "No lies" IR Thermometer - part I "No lies" IR Thermometer - part II This is part 3 "No lies" IR Thermometer - part IV   The firmware Today, I would like to briefly describe the firmware of the IR thermometer.   A picture is so ...
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   Blog posts: "No lies" IR Thermometer - part I This is part 2 "No lies" IR Thermometer - part III "No lies" IR Thermometer - part IV   IR thermometer v1 – the hardware In my previous blog post I described my motivation to build my own bo ...
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   Blog posts: This is part 1 "No lies" IR Thermometer - part II "No lies" IR Thermometer - part III "No lies" IR Thermometer - part IV   Introduction I like thermometers. Temperature is probably the most popular quantity to be measured at our ...