MobileECG may be next great open hardware project

There isn’t much open hardware medical instrumentation projects that can be considered completed and reliable. MobilECG project could pretend to be one that could compete with medical grade devices. Actually Péter, the founder of project, intended to collect decent amount of funding to get medical certification. But campaign didn’t went as planned, so he decided to make project open. Since the most of work is already done it would be sad to see project die. The decision to make it open is plausible and maybe it will completed with help of community. MobilECG is very compact device that can measure ECG using 12 leads. The ECG signal is digitized using TI’s ADS1278 eight channel ADC. For interfacing and communication to host there are two AVR micros used – Attiny24 and ATU64. Schematic is developed using KiCAD software. Firmware isn’t complete – only minor functionality with several known bugs. Anyone with biomedical engineering knowledge will definitely see the potential of this device that can be attached to any device like PC, android or other and explore own ECG signals. Continue reading

21st Century Sundial – The Combination of Ancient and Modern!

Although it’s already 21st century, but is nothing wrong to build a sundial, isn’t it? If you think it’s impossible to combine the ancient and modern technologies together, then you should read on this article… As you can see on the above figure, this is the finest combination of the 21st century and ancient time technology! Go figure, what would be the ancient people say, if they found out this incredible 21st century sundial? Yeah, they might be impressed of it! This project is built around an Atmel Attiny24 with crystal for better accuracy. The internal RC oscillator could be calibrated, but the precision can be easily achieved from crystal quartz! The whole project is quite simple, as you’re only need these following components, which as: Micro with Crystal and capacitors, The LASER, The transistor, The servo, and The power supply. The 21st century sundial project should be placed on the open space, especially on the white color wall, as the LASER is mounted on a RC servo and being projected onto the wall by a microcontroller. The microcontroller is… Continue reading