I couldn't believe my eyes when I saw how tiny that sensor is! The Doppler Effect I'm sure you're quite familiar with the Doppler effect: you send an RF signal at a given frequency to a target, and if this...

Or how to try to spend as little time as possible programming several thousands MCUs.... Why.... Just Why? As you may know I started the Mooltipass offline password keeper project more than 2 years ago. Together with a team of...

I usually never use libraries... but made an exception for these quick projects ! I'm pretty sure that most people reading this very article know about the (very) cheap ESP8266 Wifi module. A bit more than a year ago, I...

It's always fun playing with dangerous voltages ! The Idea For quite a while I've had this project idea in the back of my head that would involve using many Nixie tubes. These funny looking cold cathode displays were actually...

Did you know that most ceramic capacitors lose up to 80% of their capacitance near their voltage ratings? The Idea Not every electronics enthusiast knows that a ceramic capacitor's capacitance changes with the voltage you apply to it. This can...

I've always wanted to play with these 10W RGB LEDs! The Idea So for some reason I bought 2 IKEA lamps at a flea market. As IKEA furniture has a long history of being hacker-friendly, I figured they shouldn't be...

This is one of these "just because" projects... The Idea I'm sure that most of you are familiar with the stroboscopic effect. To paraphrase wisegeek, it is a phenomenon of human visual perception in which motion is shown to be...

$120k and a year after my previous article, you might be interested to know what happened behind the scenes... Let's pick things up where we left off I can't believe the Mooltipass project is already more than 15 months old......

Want a free board? Read below! My regular readers may already know that I never stop working on a project half-way. This is unfortunately the only exception so far, motivated by the fact that an IC isn't doing what it's...

A fun afternoon project with two platforms... As mentioned in my previous blog post I was very optimistic when designing my ESP8266-03 development board and didn't even prototype it before launching a batch in production. As I just received a...

A Wifi platform for $3... who wouldn't want to play with it? For the last few weeks we have been seeing a lot of awesome projects built around ESP8266 Wifi modules: These modules come in different shapes and colours and...

Who knew it'd be possible to use this coil to read NFC tags? A while ago I backed the xNT campaign, which aimed at making an NTAG216 based NFC implant for different purposes. After a few months of waiting and...

What's the point in going to Shenzhen if it's not to visit the electronics markets? Shenzhen... when you say this name, what directly comes to mind are all the electronic things you can find in this great city. So on...

During the month of July I was visiting Beijing and had an extra 10 days to spare. What to do? Well it took me less than a few minutes to decide to go the wonderful city that is Shenzhen... Shenzhen...

At the end of this month, I'll be leaving my current job. I therefore thought it'd be a nice occasion to build a new business card for my future interviews: You may remember the first version of my business card...

Next in our Easy-Phi articles series is the High Speed Logic Gate board: I'm sure you must be wondering why it is necessary to develop a complete card to implement such simple functions . Well, when you're dealing with high...

I'm sure you must have noticed by now that during these last months I didn't put many projects on this blog. This is mainly because I'm currently working on the Mooltipass project, an offline password keeper idea I launched last...

Stock management and Bill of Materials generation are usually neglected when it comes to making projects, so I updated a tool I made a while back... Unfortunately for Linux users, this utility is made using Visual Basic functions in an...

In physics experiments, it is often required to detect any kinds of electrical signals. That's why we developed this module: Requirements You may recall from my previous articles that easy-phi modules use a well-defined electrical signal to communicate with each...

In this article, I'll present you 'the beast': a cortex M4-based platform that has plenty of communication interfaces and to which you can connect a lot of different peripherals: Preface Before starting this project description, let me first say that...

Next in our Easy-phi descriptions: the template module. The template module consists of the core elements used by any easy-phi module. If you want to make your own module (we hope you do!), this is the starting point you'll need....

After having borrowed my work's CNC so many times, I figured it would be better if I bought one Choosing the CNC you need I occasionally need a CNC to machine slots in enclosures I buy. For example, Hammond manufacturing...

So I'm sure that after the previous post where I presented the easy-phi project, you'd like to see the actual hardware. So we're going to start with the rack: As a beginning, we decided to work on a frame that...

I had no idea that you could find this kind of motion sensors on the internet for so cheap... But they come with a catch: you need to design some electronics for them. I'm sure you're quite familiar with the...

Hello everyone, In this post, I will present a new open hardware project we are working on at my work.... In a quantum optical laboratory, as well as in any physics laboratory, electronics are an essential tool. In particular for...