If you were in a situation when you need to put expensive stuff on display, but to ensure its safety without attracting the attention of people even when triggered the alarm. Or, for example, you need to Wake up early, but not to disturb the household. This is especially true when in the same room with their parents children sleep. For this fit, we offer vibrating alarm. You can make yourself using simple electric circuit and the miniature motor with an eccentric, taken from old, obsolete cell phone.
Research scientists and experience of beekeepers show that with a good supply of benign feed and caring the contents of a winged honey bee plants can stand the winter even when severe frosts. After all trouble for weakened bee colonies in the cold season is not so much the reduced temperature, how much humidity, when the frames and the inner surface of hives moldy, and the increase of the thermal conductivity of moist air surrounding a ball of bees, and damp walls threatens to increase in heat loss with all the ensuing grave consequences.
In refrigerators with mechanical regulator temperature measured on the evaporator. It happens that the evaporator becomes covered with frost, and the thermostat begins to operate with an error, making failures in work of all lagoapraia. To combat this unwanted phenomenon (including — with the advent of frost) refrigerator has to periodically disable. In some designs there is a semi-automatic defrost mode, which the system is embedded a heating element with the corresponding button. 
The soldering iron is any homebrew. But those who have to deal with modern electro – and radio equipment, this tool is something special. And the requirements for it are quite hard: with small size, low supply voltage and low power consumption to ensure the excellent quality of soldering. And with the maximum comfort, including temperature controller soldering tip and a stand with a tray under flux solder and tinning.
