Signet is a compact, open hardware, and free and open source software USB device that safely stores your passwords, bookmarks, contacts, and other personal data in encrypted memory. It’s compatible with MacOS, Linux, Windows, and Android so you can use it on any device with a USB port. The device is smaller than the average […]
It is possible now to turn your iPad into a second display using Luna Display! Luna Display is a hardware solution that extends your Mac desktop to your iPad, creating a wireless second monitor maintaining high resolution. In fact, Luna is one of Astro HQ products, a startup working on delivering tools for designers and
Turn Your iPad Into A Second Screen with Luna Continue Reading
They say you can’t manage what you can’t measure, and that certainly held true in the case of this bicycle that was used to measure the speed of cars in one Belgian neighborhood. If we understand the translation from Dutch correctly, the police were not enforcing the speed limit despite complaints. As a solution, the local citizenry built
You feel that you’re unpopular and no one likes you. The bad news is that if that’s the case in the real world there’s no easy way to fix it. The good news is there’s a great substitute — your popularity on Instagram. With this vending machine you can replace your personality with followers on Instagram.
THE AUTOMATED SOLUTION TO YOUR UNPOPULARITY Continue Reading
We’re living in a golden age of software, where many useful programs are available – for free! Let’s survey some of what’s out there that just might interest an engineering crowd like the EDN community. I can’t offer personal opinions on most of these packages, but I expect to hear back from you after you’ve
HeartyPatch is a completely open source, single-lead, ECG-HR wearable patch with HRV (Heart Rate Variability) analysis. It is based on the popular ESP32 system-on-a-chip. By using low-cost, highly-integrated components, we are able to keep the BOM’s cost low, while the simplicity of the circuit design means future expansion will be easier. HeartyPatch can be used
HeartyPatch – Open source ECG patch with Wifi Continue Reading
Two years ago, the Sculpto 3D printer appeared to make 3D printing more affordable and user-friendly for everyone. Recently, the new version Sculpto+ came with more useful features, making it a unique printer with the same printing area and price range. The Sculpto+ printer is a compact printer for beginners, kids and adults to start
Sculpto+, An Affordable User-Friendly Wireless 3D Printer Continue Reading
How about a cheap serial terminal for less than a fiver all-in? In a previous blog entry I’ve been working on more developments for the increasingly powerful home control system using an Arduino as a kind of universal I2c peripheral to the ESP8266. The reason for that is just the vast range of driver software
In the previous posts I’ve described a simple Geiger–Müller counter and various experiments with this device. Today I would like to present Arduino project to communicate with a Geiger-Muller counter, gather data and present it to the user. The device is based on Arduino Uno, Nokia 5110 LCD and homemade shield. Currently it’s possible to
Arduino Geiger–Müller counter with LCD display Continue Reading
I made surprisingly good ECG from a single op-amp and 5 resistors! An ECG (electrocardiograph, sometimes called EKG) is a graph of the electrical potential your heart produces as it beats. Seven years ago I posted DIY ECG Machine on the Cheap which showed a discernible ECG I obtained using an op-amp, two resistors, and a capacitor outputting to a PC sound card’s
