Archive for the ‘Hardware’ Category

Light sensor (Part 2)

Part 1, 2 In the previous part of this publication, I covered the subject of sensitivity. As for many sensor, the range is very broad and a simple configuration cannot help covering the whole range of light intensities. As in the dated controllers, we might want to use a hand operated sensitivity selector. Although this […]

3D prints: Stevenson screen

Building a basic weather station today is simple and cheap thanks to specialized integrated circuits featuring temperature, humidity and pressure sensing. Up to now my favorite is the Bosh bme280; you may easily find it ready for use on small PCBs, easy to connect on any prototyping platform. Adafruit industries is selling a very convenient […]

3D Printing (Part 14)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 The heating plate is made of two symmetric printed conductive layers ~1.5 Ohm each. As printed on the heating plate you may wire them for use with 12 V or 24 V power supplies. As we need to add an extra power supply the choice for a 24 V power supply is […]

3D Printing (Part 13)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 Many PLA rolls were fused in my Welleman k8400. So far, it has been a good servant in spite of few breakdowns, mainly due to clogged nozzle or improper adjustments. Careful cleaning and fine tuning solved all  these problems except one which is my fault. As I was taking apart the fusing […]

TASCAM Sound Recorder (Part 1)

Part 1, 2, 3, 4, 5 The followers of arduinoos know that I have a constant and strong interest in sound recording and analysis. As I get more and more requests for specific sound analysis, I decided to get a semi-professional sound recorder to capture sound events in various environments. Thus the wish list that […]

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, […]

Shortage of Multilayer Ceramic Chip Capacitors (MLCC)

How come this tiny ultra familiar component is running out of stock ? The information raised by constructors and vendors states that the unexpected growth of demand lead to a recurent shortage of products as explained here, there and here again. These papers also give advises for those who did not contract the supply of […]

PCBs (Part 4)

Part 1, 2, 3, 4 PCBWay order review Delivery: The parcel arrived in my mail box 5 days after the order date, as announced !!! This is great news as we are all eager to get the real thing asap. Packing (Mail): The parcel was delivered by DHL: we know this company, I personally used […]

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 […]

PCBs (Part 2)

Part 1, 2, 3, 4 Let’s exercise the tip and tricks that I shared with you in my latest post. Here are the requirements for this subject: Project: As a one idea per minute person, it was hard for me to stick to one project and one design. However, I had in mind the project […]