Basic current sensing on Arduino
I’ve got a side project of building a digitally Arduino controlled PSU that also includes an accurate component tester. In order to do this I’ll have to be able to monitor the current flowing through a circuit, so I’d need some way of monitoring this. Before continuing, I’d like to say that is not an exemplar of how to build a great current sensing circuit, it’s a prototype shown for example purposes only.
Building a holder for my Arduino board
<img class=" titleimg" alt="complete arduino holder" src="/images/electronics/arduino/holder/board-assembled.jpg"/> After almost shorting out my Arduino with a piece of wire that was left under the circuit board, I decided it was time to mount it onto a proper support board along with the breadboard I often use with it. Okay I could go out and buy one, but I had a nice piece of high grade birch plywood in the garage (left over from building a pair of speakers).
Arduino 7 segment LED display tutorial
In this tutorial I show you how to connect a 7 segment display to an Arduino board. For a tutorial showing how to drive 4 or 8 digit displays see (Arduino multiple digit, 7 segment display tutorial). Firstly, we must know what type of display we have as there are two possible forms, common cathode and common anode. If the display is common cathode, then the LOWER voltage side is common, if the display is common anode, then the HIGHER voltage side is common.
Getting back into analog electronics
After a long pause, I've finally started to get back into analog electronics. I'm using the Introduction to Electronics and this blog as a way to help myself back up the curve. Below is my first working circuit, the good old class A amp. Twenty years ago I could have thrown together fairly complex circuits in short order. However, now it takes me a bit longer, after twenty years of C, C++ and Java programming.
Introduction to Electronics
There are a few good books and websites that I recommend for people starting out with electronics. All about circuits Website that has several electronics books available online for free, these cover, DC theory, AC theory, semiconductors and digial electronics. DC covers voltages, currents, ohms law, conductors, insulators, batteries. Further it also covers network theory AC covers complex numbers, capacitors, inductors, transformers amongst other things SEMI covers the theory behind semiconductors.
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