Archive for the ‘Uncategorized’ Category

PLD (Part 6)

Part 1, 2, 3, 4, 5, 6 The PLD features a multipurpose connector mainly dedicated to plugging sensors. This video shows how easy it is to configure a PLD an run an application for  monitoring temperatures. Back us on Kikstarter … Do you want to know more about HL2, HL2 Panorama and HL2 PLD ? Check this video Thanks for watching

3D Printing (Part 12)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 3D printing can be tiring for the nerves… For a week or so, I was enable to print full size parts without enduring severe problems such as splitting layers, irregular faces and even gaps. Here is an illustration of the prints before the fix (on top) and after the fix. The first layers […]

Undocumented commands and functions

Long time ago as I was learning about George Boole  algebra I immediately though about using a (hidden) sequence of button presses to lock and unlock safes, doors, etc.  In addition to setting arbitrary sequences of button presses, I had the idea of taking into account the time spent on pressing each button which would […]

What a shame !

I recently reactivated my Facebook account in order to express my opinions during the last campaign for the election of the French Republic President. Well, I am not naive and I know by experience (I have been myself a candidate for the house of Parliament) that a campaign may be (very) trash. However, what struck […]

Wire as you think

I was used to build my prototypes on strip-boards, burning my fingers, loosing my nerves and making many wiring mistakes because of the mirroring effect. And then came the illumination ! As I was visiting the R&D plant of my former division in Palo-Alto I observed engineers using breadboards to design yet pretty sophisticated devices. […]

News and Moods

Some time ago, I suggested to append the keyword Arduino to any search for some advanced techno oriented questions. Arduino acts as an amplifying or magnifying factor as you look for the latest developments, the smartest solution in any kind of technology. It sounds like a password whispered at the entrance of a secret society […]

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, 8, 9 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 […]