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

Which e-reader is the best to use?


If you like to read books without having the inconvenience of carrying them around with you then chances are you have considered buying an e-reader, if you do not already have one. At one time e-readers were hugely popular; it was something of a trend to own one. That has since changed a little and the popularity of e-readers has remained static somewhat. This does not mean there is not still a place for e-readers if you like to read on the move. Of course, you do not necessarily have to use an e-reader to read content. You can read more about the various types of publications you may be able to read online, such as flip-books. The fact remains that certain content is specifically created to be read using … 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

How to Get Your Important Homeschooling Tools & Supplies


Surviving financially Although the US economy has been on the road of recovery since 2008 there are still a very large number of US families that are struggling to survive financially. It just seems that there is so much uncertainties over which we do not have control. There is just no way to know whether more bailouts or tax surprises may come our way. Those finances we do have, have to be well managed and they have to be spent on real necessities such as school tools and supplies. Many people have heard about homeschooling but they do not really know which kinds of educational tools and supplies will be necessary in order to ensure that the child can be properly educated. There are more things to consider than merely … Continue reading