Archive for the ‘Uncategorized’ Category

Mon p’tit python ! (Part 1)

I had a laugh when I started tumbling around on the web, trying to get a proper starting point for learning Python ! I heard about the famous Pink Floyd rock band funding the no less famous “Python and the Holy Grail” with a part of their substantial earning from “Dark Side of the Moon” […]

DC-motors (Part 1)

Part 1, 2, 3 DC-motors are every where in many form factors, many performances and configurations. The aim of this series of posts is not to cover all aspects of DC-motors as there are so many publications available, most of them being of excellent quality. Firstly, I will concentrate on the most common brushed DC-motors . Next […]

The word of the day …

Thank you Michel, a senior professor in economy with which we had a pleasant time last Sunday, for talking about Jugaad during talks about news paradigms in many domains. I like very much this concept, and I ought to spend more time with Dr. Shiv Parakash Rathnam (alias Dr. Shiv) talking about this principle that I […]

Stepper Motors (Part 7)

Part 1, 2, 3, 4, 5, 6, 7 This post is about driving stepper motors. In the previous posts I described the various components involved in motorized assemblies featuring stepper motors. However, putting all these nuts and bolts together may lead to unexpected results. In my case, these defects where related to the use of stepper motors […]

Tips and Tricks (Part 27)

Previous T&T This T&T deals with the compression of numerical data. Using the proposed algorithm, you will be able to compress a 16 bits unsigned integer (so as to say an uint16_t or an unsigned int data type). into an 8 bits unsigned integer (so as to say an uint8_t or an unsigned char data type). […]

Cool stuff of the day

Although very handy for basic applications, you may soon or later want to get rid of the basic timing functions from Arduino and start using advanced timing featuring better accuracy and avoid time consuming waiting loops. There are several approaches to achieve this goal. Firstly, you may explore the web and try to find some information of interest. […]

Amazing 3D printing

As a big fan of 3D printing, I had a lot of fun watching this video In the next future, this is what we will hear from NASA records: “Hello Houston, we have a problem” “How can we help ?” “Could you email us a cable clip so that we can tidy up this harness” […]

3D Printing (Part 9)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Open source printers are for ? … They are for mods, hacks and tweaks ! The first obvious modification (not to say immodestly improvement) deals with the cooling air blower in front of the print head. Most the air flow would splits on the Y axis rod, some would re-converge thanks […]

3D Printing (Part 8)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 This post is all about the new printer that I bought for my own pleasure and private use ! It globally fullfils my own requirements which could be enumerated in this way: Budget: less than 800€ Printed material: PLA and ABS, others if possible; 1.8 mm filaments Open source: mandatory Extruder: 1 […]

Stepper Motors (Part 5)

Part 1, 2, 3, 4, 5, 6, 7 The A4988 in details Previous posts described the basic use of the A4988 driver. We shall get deeper in the A4988 driver in order to achieve the ultimate driving performances. Apart from the STEP and DIR pins the A4988 driver features additional functions addressable through the following pins ~RESET: […]