Posts Tagged ‘Hardware’

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 […]

PCBs (Part 1)

Part 1, 2, 3, 4 PCB design pitfalls… A quick glance on the net brought me to various interesting web sites: “4 Circuit Board Design Mistakes to Avoid” “PCB Design – The Top 5 Mistakes” “6 PCB Design Mistakes to avoid designing printed circuit boards” “7 Fatal Mistakes to Avoid on Your PCB Design” “Top […]

Current generators (Part 1)

Part 1 Here starts a new series of post dedicated to current generators. As usual, the idea is to describe working experimental prototypes that feature few components and quite good performances. Current generators can be found in various applications such as battery chargers (advanced ones, aka multiple stages or intelligent battery chargers), LED drivers and […]

Particle sensors (Part 1)

Part 1 I am amazed by the massive improvements of sensors along the last 10 years. Not so long ago, some sensors would fit in a shoe box and require 24 VDC, not to talk about the interfaces, weight, etc. These improvements are mainly due to the incorporation of advanced sensors in smart phones: camera, […]

Metal detector (Part 1)

“Dear cousin, I lost my keys in the middle of the meadows, would you please make a metal detector for me ? Urgent !“ This is really how this project started ! More or less, as I have in mind the design of an Earth’s Field Nuclear Magnetic Resonance spectrometer which features magnetic fields sensors on […]

Direct Digital Synthesizer (DDS) (Part 7)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 A recent project lead me to excavate a quite old DDS design which may be of some interest for you. Instead of using a ladder of resistors, this design features a simple, cheap and yet powerful digital to analog converter. I will later explain why I choose this particular Microchip circuit but for […]

PLD (Part 5)

Part 1, 2, 3, 4, 5, 6 HL2 PLD may be used for safety applications too. In this configuration, the PLD is able to detect movements up to 7 m away within and almost 90° view angle. It features a PIR (Passive Infra Red) sensor from Panasonic. This sensors is available in different sizes depending on the required range; the enclosures […]