Archive for the ‘Uncategorized’ Category

Blog of the day

While tumbling through the net, I mean through the jungle of publications, I found the oasis of the maker ! I like very much the look and feel of Last Minute Engineers web site: nice pictures, well explained and documented topics. Pinouts and code samples will help you learning by doing. One can be fed […]

3D PRINTING (PART 15)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 First serious failure…After exactly 4 years of regular use, I experienced the first failure which is due to an aged component. Although Peek is a very strong material, it did not sustain any longer the thermal strength which it endured for years. This critical part is responsible for guiding the “cold” […]

HC-05 Bluetooth module (Part 1)

Many web pages, posts and topics can be found on the web, however it took me quite some time to gather enough information to have a clear picture about the HC-0x series Bluetooth modules. Although they are outdated by low power BT modules, these modules are still a product of choice for building amazing applications […]

100 !

This picture illustrates my production of facial masks frames of the Easter week-end!I never produced that many parts of the same sort using my brave old Vertex printer. So far, I experienced only 2 failures:– 1 part was poorly printed showing gaps and lacks of filament. This problem did occur any more after a careful […]

By all means

By all means let’s stop the covid-19! The heroes are those who stay home, in small flats, with nervous kids, noisy neighbors, low stocks of toilet paper and plenty kindness through the networks. The action men and women keep the ball rolling, feed us, power our phones and care about us. They deserve as much […]

Light sensor (Part 1)

Part 1, 2 Sensing light is probably one of the most common sensing and probably one of the simplest measurement to start with. Light sensors are used to detect light or brightness in a manner similar to the human eye. They are most commonly found in industrial lighting, consumer electronics, and automotive systems, where they […]

Date and time serial: how to bypass the lack of precision of floats

Data type is probably the first concern for any new programmer in c/c++. These language require in minimal knowledge about integers and floats (Check this thread). Although these data types look familiar to all educated people, the principle of significant figures, which should be the universal way of formatting data, is, most of the time, […]

Code documentation (Part 1)

Part 1 Writing code is awesome. Have you ever compared coding works to the work of the potter ? He starts with a piece of clay, shapes it , refines it up to the final object. None from its production is fully identical to an other. Same thoughts apply to the coding works: the language […]

Retour vers le futur

Allez, zou, pour une fois voici une publication en français ! Cà fait un moment que çà me grattouillait le clavier de composer dans ma langue maternelle, et je vois au moins deux bonnes raisons de faire une entorse à ma politique de publication. Soyons réalistes, l’anglais est une langue universellement comprise par les technophiles, […]

PCBs (Part 3)

Part 1, 2, 3, 4 Once we have our gerber files ready, it is time for “printing” the PCB. For a long time (and a long time ago) I used single sided coated copper Bakelite boards. Then I would copy the circuit  on copper using a special permanent ink pen (in negative) and immerse the […]