Chronio – an arduino smart watch that looks great

There are many attempts to build custom smart watches. Many of them have nice characteristics, but lack the finished look. If you are going to wear it, then design and feel is very important factor. Max.K introduced his 3D printed watch version. His design called Chronio is an Arduino based custom built watch featuring Atmega328p microcontroller, Real time clock DS3231, 96×96 pixel Sharp Memory display and is powered by CR2025 160mAh battery. The watch has overcome several revisions and already has a bunch of useful features that include efficient power saving that leads to 20uA power consumption, 3 button interface (no touch screen functionality), displays time, date, temperature and battery information on main screen. Other apps include stopwatch, experimental Flappy bird game. And additionally to that case fits standard 22mm … Continue reading

NanoPi Neo – Raspberry Pi squeezed down to 40mm

As wit h Arduino, it is becoming hard to keep up with Raspberry Pi variations. There area many sizes, clones and performance choices. And this is great. Friendly ARM have developed pretty neat Raspberry Pi native board called NanoPi. As its name states, the size of board is 40mm x 40mm. Dont be fooled by its small dimensions. It packs everything you may need to run small board computer: CPU: Allwinner H3, Quad-core Cortex-A7 Up to 1.2GHz DDR3 RAM: 256MB/512MB Connectivity: 10/100M Ethernet USB Host: Type-A x 1, 2.54 mm pin x 2 MicroSD Slot x 1 MicroUSB: for data transmission and power input Debug Serial Port: 4Pin, 2.54 mm pitch pin header GPIO: 2.54mm pitch 36pin. It includes UART, SPI, I2C, IO etc PCB Dimension: 40 x 40 mm … Continue reading

Arduino based FM radio with digital volume control

niq_ro have shared his Arduino based FM radio design on insrtuctable. TO catch FM waves he used TEA5767 FM chip which can be interfaced to Arduino via I2C interface. To adjust volume he used MCP4261-502E/P – dual digital potentiomer controlled via SPI on 8 bit steps. He made some effort to implement pretty nice interface on Nokia 5110 display. Here you can see the frequency of band, volume level, signal strength gauge. The only thing is left to do is to put everything in to enclosure.

Would you build a remote controlled lawn mower?

Mowing grass is one of those ‘must be done’ jobs where some people like it and some don’t. In fact this is great exercise and relax at least for me. Anyway if you like building cool things and amaze people, then why not upgrading your lawn mover to remote controlled version. Blake Hodgson have built an open source version of such mower called Lawn Da Vinci. He welded a metal frame of angle steel, fit a mobility scooter electric motor on the back to drive it around. As he says – any cheap mover can be fit to the frame to do the cutting job. He used an RC remote Tower Hobbies System 3000, but in fact any RC remote should be fine. The driving motor is controlled with Arduino … Continue reading