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

Farmbot rises farming to next level

Growing your desired greens is pretty intense work. The preparation of soil seeding planning and constant care must be done to get result. It may seem that there isn’t much to do – just plant a seed and take a look from time to time. But in reality, growing great looking, nutritious plants require constant care that include watering, weeding, fertilizing and timely collecting. If farming isn’t your primary job, then most likely you are going to forget to water or pick weeds. This is why Rory Aronson decided to develop open source farming machine. Farmbot is a 3 axis CNC platform that can vary in size depending on your soil area. It is capable of taking care of multiple different kinds of crops in same area. Planning and taking … Continue reading

Color coded weather forecasting with Raspberry Pi

It is hard to display weather forecasting in compact form especially for longer periods. Text based display would look too cluttered. Color coding looks more promising. AughtNaughtZero have shared his instructable on building 32 hour weather forecasting device on Raspberry Pi. For displaying various weather parameters he used custom 6×16 RGB LED matrix. Raspberry Pi pulls weather data from Weather Underground API using Python script. The each of 6 rows of LED matrix is dedicated to different parameter: temperature, pressure, humidity, wind speed, chance of precipitation, and weather condition arrays. The each column of of each line is spread for 32 hours of data where each dot is color coded to represent the forecasting for two hour period. The python script uses couple libraries and code snippets to handle color … Continue reading

Tiny OpenWRT Linux computer

Linux based development boards are all around. Raspberry Pi is probably the leader among cheap and powerful solutions, but there are more options to choose like CHIP, OrangePi, BeagleBone or other more expensive options. Raspberry Pi Zero seems to be small but it lacks some built in functionality like Ethernet. If you look for smaller Linux based computer you could give a try to VoCore. It is practically built around Ethernet plug, but features most required parts like WiFi, USB, 20+ GPIOs. VoCore is able to run OpenWRT Linux which is capable to perform most of Linux tasks. It is suitable for home automation projects, WiFi routing, or to be placed as node in other embedded system. VoCore features Ralink/Mediatek 360MHz RT5350 MIPS processor, 32MB SDRAM and 8MB SPI flash. … Continue reading

Expanding Raspberry Pi 3 WiFI range with external antenna

With appearance of Raspberry Pi 3 the new wave of hacking begun. This time the attention falls on new WiFi functionality. As wardr states: “It’s not clear why an external antenna is not an option for the Pi 3 ”. Having said that he thought why not including one by himself. He found that there can be two options of including external WiFi antenna. One could be more barbarian – just remove chip antenna and solder it to left top mount pad. This is more messy part as you need to scratch ground plane to make it possible soldering copper mesh. Another way is more civilized. On the bottom side of Raspberry Pi 3 there is two exposed pads where U.FL connector almost fits. Yet you still need to clear … Continue reading