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

Arduino based capacitive liquid sensor

Water or any other liquid level sensors can be handy around a house. It can be used to monitor a water tank level in a greenhouse or in other areas where liquid level has to be known. The idea is pretty simple – measure a capacitance charge between two metal plates/foils, which varies due liquid level change between them. Of course container has to be non metal. Probably most important part is to read capacitance. For this there is a handy Arduino Capacitive Sensing Library ready for you. To measure capacitance is to measure capacitors charge/discharge time through resistor. Don’t expect great precision with such materials used, but still this is a fun project to try out. Continue reading

Traffic light in your room

Why would you want a traffic light in your house? OK despite it’s look traffic light can be used simply for fun, or can display some specific information, like email or IM notification, weather alerts, or other you can think of. Rockwell Schrock have made such traffic light that can be controlled via USB directly, or can run predefined sequences. Circuits is based on Arduino schematic that accepts commands via USB interface, or simply runs predefined sequence of light switching. Lamps are controlled via electromechanical relays so you can hear a click noise too. This is really fun evening project to make. Continue reading

Core2duino – Dual core Arduino

This project was started by johndavid400 whose intention was to get more I/O pins from Arduino. So why not to add another Arduino board on top and almost double the number of pins. As result you can have 12PWM pins, 12 Analog, 40 Digital pins and 4 external interrupts. Actually you don’t have to build a now complete Arduino board, as stacking them allows to exclude power supply and USB interface. both Arduino’s communicate via I2C interface this way consuming only two digital pins, while other may be used for other purposes. To make things work, there has to be sketches for both arduino – master and slave. For now, it only has sample sketch for controlling digital pins. But after some coding it can be converted in to full functioning expander or who knows maybe some dual core routines. If you need more I/O’s fro Arduino, this is right choice. Continue reading

pHduino – an open source pH meter

pH is really important environment parameter. It’s value expresses acidity or basicity of a solution, e.g., soil or water. pH parameter depends on concentration of H+ ion in the aqueous solution. Probably we al heard that human skin pH is 5.5 so most cosmetics tend to be close to it to keep natural balance. So where would you use a pH meter? Probably many places like fish tanks where special fish can not stand different pH level, probably flower soils, any water and other purposes you can think of. phduino is a great choice for measuring pH level as it is an open source project. It has a LCD for displaying pH value and temperature. Phduino uses a standard glass electrode pH sensor. Phduino is the same Arduino board that has all matching Arduino pins and additionally LCD connector, temperature sensor connector and several other components specially needed for operation. With all this you get pretty cool tool that can be expanded for many purposes by interfacing, programming new features. Continue reading

Bulbdial clock – a fancy way of displaying time

Time is very important factor in our life. This is why our home is full of clock to keep track of time. Clocks, watches are different and unique design. But when you hear a clock you start imagining a mechanical clock with arrows indicating time in a circular scale. But as you know mechanical parts are used to wear out. So why not to make similar clock without moving parts. This is what evilmadscientist guys have done. They used 72 specially arranged LED’s that give a shadow’s representing an arrows pointing to numbers on a dial. They used time chip DS3231 for accurate time count. Whole process is controlled by Arduino like hardware – of course specially shaped PCB. You can build it yourself or you can get nice kit for very reasonable price. Continue reading

Hardcopy – an Arduino clone with prototyping area

Arduino is a great platform for everyone who is involved in embedded electronics. This is really complete development solution for both – pro and beginners. And the good thing is that Arduino is an open project where everyone can build it’s own or modify to meet specific needs. Hardcopy is an arduino clone with built in prototyping area what makes projects more reliable – especially if you are building something that has to be put in real world environment. It has a large prototyping area where you can place quite some electronics components. Size of board is exact to fit in to Altoids box. So this is a great project to keep eye on. And indeed – more Arduino mods this means more flexible you can be while building your next project. Continue reading