Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Off grid weather station powered by Raspberry Pi

Raspberry is great board for building internet of things stuff. It is powerful and low power to be used with small solar panel anywhere in the field. PiJuice have been working on great solar powered weather station project. It is basically a fusion of two great projects – PiJuice which takes care of solar power management and AirPi, which carries tons of sensors. The problem he run in to was the sensor board, which connects directly to Pi header, but for outside use it is better to keep electronics sealed. So he build his own version of sensor board based on same AirPi. He used Raspberry Pi A+ for its low power consumption and for remote connection hes chosen EFCom Pro GPRS/GSM module which can send text directly to cell phone. Since most of sensors hace analog interface he used MCP3008 ADC converter which can take up to 8 analog sensors. So far there are only three sensors used – LDR, gas sensor (TGS2600) and LM35 temperature sensor. SO the list can be expanded later. Raspberry Pi communicates with GSM… Continue reading

GertDuino – made for Raspberry Pi

Arduino and Raspberry Pi are long time used in many projects. Problem is that its a bit tricky to connect Arduino to Pi in convenient way. You need to make cable adapter or so. This is why one of the first Raspberry Pi volunteers Gert van Lo (this is where GertDuino name came from) decided to build a dedicated Arduino that would connect to Raspberry Pi conveniently and have even more features as well. GertDuino comes with Two microcontrollers. Standard Atmega328 that handles Arduino functionality. Another is Atmega48 which brings more additional I/Os, handles battery backed RTC and IRDA interface. The board also comes with RS232 level converter and it can be used by any of microcontrollers including Raspberry Pi itself. Additionally there are two buttons and 6 LEDs. More information at element14. Continue reading

Expanding Raspberry Pi with more I/Os and servo outputs

Rasp Pi comes with I/O header what makes hackers and tinkers do lots of fun within Linux. But when you need do more specific interfacing like serial RS232 or RS485, or Servo control, it takes some preparation. To make things look more easier an expansion board called Raspy Juice was designed that holds serial RS232 and RS485 connectors and level convertors. Additionally there are four RC servo ports. All this wouldn’t be so easy with AVR Atmega168A microcontroller on it. It interfaces to Raspberry Pi as i2C slave. After using several pins for above functions there are sill few left for general purpose. SO why not use them for analog input that are so welcome in Ras Pi. If you’re wandering what other expansion boards are already made then check out this nice list – might find something you need. Continue reading