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

Open source energy monitoring system

This is fully featured energy monitor based on Atmega328 microcontroller which is compatible with Arduino IDE. It is based on JeeNodeV5 for easy expandability. Device has two CT monitoring channels that reads electricity consumption by using energy CT sensors. Also it is features with pulse counting input that can read water or gas meter optically or from direct output. emonTX has a dedicated port for 1-wire DS18B20 temperature sensor input. As these are stackable so it can read multiple sensors from single line. Energy meter can be battery powered so it can be attached anywhere and communicate wireless nanode that accepts data and publishes online via pachube service. Continue reading

Motorized Curtains with a remote control using an ATmega328

Everything started with a need to indulge laziness – and the wireless remote control was born and from then on everything from televisions, electric fans, air conditioners to door locks came with wireless remote controls. And what’s keeping us from taking the frenzy further? – Nothing! Attach a DC motor to the curtains (giving it a little muscle), integrate an AtMega328 microcontroller power up with an Arduino bootloader add wireless capability and BOooM! A remote controlled curtain for your hard to reach windows. To isolate the AtMega328 from the large current requirement of the DC motor an L293B H-bridge was used, reverse voltage diodes were used for protection. A TSOP 1738 was used to capture IR signals from a PixelView TV Tuner remote control. A step closer to a fully remote controlled home, what’s next? Remote controlled garage door? – Now that’s something even Bruce Wayne would envy. Continue reading

Clocks can be fun

There are many digital clock projects in the internet. Each of them has something different that makes them interesting and attractive. This one has some charm too. It is very simple clock without any buttons and alarms, but it has an IR light detector. Microcontroller simply reads IR sensor data and depending on hand distance from clock MCU increases or decreases LCD backlight. So, by hovering hand near clock you can see time. The closer hand to clock– the brighter LCD. Accurate time is calculated by separate RTC DS3232 IC. Continue reading