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

Arduino based ultrasonic anemometer

Anemometer is a fancy name of a device which measures wind speed and direction. We are used to see mechanical spinning devices that rotate and thus indicate speed strength and direction. As we know, mechanical things aren’t always reliable especially in rough conditions. In other hand, ultrasonic anemometer can be more sensitive and precise. Lfaessler have written a series of build posts of ultrasonic wind meter. His design uses four pairs of ultrasonic transducers that are positioned perpendicularly. By knowing ultrasound speed in the air, it is possible to determine wind speed and direction from ultrasound speed change. All four transducers are controlled by Arduino which takes care of correct signal routing and measuring time between sent and received signals. Arduino also calculates wind direction in 2D plane and its speed. Since received ultrasonic signal is weak, he designed amplifier to make them acceptable for Arduino input. There are intense testing and tuning involved in this part, since it is important to sense received signals correctly in order to get precise readings. After initial testing and build, project ended in… Continue reading

Have a Brand New Experience with Weather Canvas!

Mother Nature is always full with many unexpected surprises. That is why some people enjoy the outdoor activities, such as hiking, trekking, kayaking and so on, rather than staying at home in weekend! The only matter is weather is constantly change and unpredictable. Maybe it full with sunshine in the morning, but it rains heavily in the afternoon! It will cause some difficulty, especially for those who planning to have some outdoor activities. In this case, you might need an assistant to help you overcome the matter. Well, Weather Canvas is coming for the rescue! A little bit different from other DIY weather station, Weather Canvas is a outdoor wireless weather monitoring system coupled with an indoor LED display. For your information, the outdoor system consists of a microcontroller, temperature sensor, humidity sensor, self-DIY anemometer, a Hot Wheels radar gun (It’s for measuring precipitation) and a solar panel to measure sunlight, also charge the microcontroller’s power source! This is how the Weather Canvas works: In the very beginning, the system is transmitting the data it has collected to the indoor… Continue reading