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

Maintaining room humidity level

Right humidity level in the room or other area is as important as temperature. Not enough humidity leads to dry climate and overall feeling. Indoor plants may suffer, you sleep quality may drop. In other hand to much humidity could damage materials, have effect on your health. Like everywhere – there should be some balance. In practice human feel better when environment is more humid than dry. Personally for me 50% to 60% relative humidity is best. But not all places naturally have good humidity. Especially when heating season starts, humidity usually drops and you need to thing of ways how to increase its level. Many people use wet towels or other passive ways. Other use humidifiers. __loovee__ from instructables have built his own arduino based automatic humidifier which constantly monitor humidity level and adds some humidity when it drops. He used DHT11 temperature/humidity sensor to detect humidity level. In order to add humidity he used water atomizer which is basically piezo element that vaporizes water. Arduino/Seeduino stores the threshold level which can be changed. He made acrylic enclosure which… Continue reading

Multi-featured digital clock

MCU based digital clocks are all over the Internet. So making another one isn’t an option if you want to impress someone. Konstantinos have decided to expand his clock with additional unique features that makes it interesting and useful. As a base processor he used PIC16F917 microcontroller that reads clock data from DS1305 RTC IC. Clock outputs time in two formats – digital on LCD and binary on LEDs. This is already geeky but this isn’t it. It also has a digital humidity and temperature sensor SHT11 attached which displays ambient temperature and absolute (gr/m3) and relative (%) humidity. Continue reading

PIC based climate controller

Climate controller reads temperature and humidity values from SHT11 where are temperature and humidity sensors combined. Temperatures scale reaches from -40 to 123ºC or (-40 to 254ºF) while humidity readings can vary from 0 to 100%.   Controller board can control three distinct CD outputs with 10A load or 2 DC outputs and one AC up to 4A. This project can be ideal for greenhouse control, small room climate control or in other areas where temperature and humidity has to be sustained. Complete project files including C source, hex file, schematic and PCB can be downloaded here. Continue reading