Automatic protection against changes in voltage with their hands

Causes of unstable voltage

to enhance the core voltage line can "work" state of emergency wiring in the house.Due to disconnection, for some reason, the total cable, the zero "zero burning", so that adjacent phases assume a hazardous voltage of 360 volts.

Undervoltage can occur due to a simple reason such as a one-time connection of multiple high-power appliances or malfunction substations.

course, increased tension at times dangerously low, but you need to fight and with that, and with the other in order to avoid damage equipment.To do this you must first measure the voltage level, and then select the device that can cope with the problem.

Who to trust?

Causes fluctuations of electricity supply can be different.Sometimes the voltage jumps barely noticeable, but there are severe cases when single phase 290V outputs, the other 200, and the third just 160. In this case, the cheapest Chinese machine is unlikely to cope.You either buy expensive European versions, or to trust yourself and make reliable automatic protection against voltage surges own hands.

Consider why do not skimp on the quality of the security of its own network.

design Cons inexpensively purchased machine

If there is an opportunity to explore the inside of the unit, see the PIC16F676 microcontroller.The board has 14 outlets, operates without binding, is inexpensive (around $ 1), has on-board ADC.In general, the controller is very good and can serve as an excellent basis for a reliable machine, taking into account and correct all of its flaws.Automatic Image

board has an insufficient number of conclusions, hence the developers fault.Enabling switch in the original machine is made through the screen scanning detector.To smooth fluctuations in the role of the detector filter performs electric condensers.Theoretically, this inexpensive construction, of course, to cope with the task, but in practice it is far from the truth.When the mains voltage is out of range, the screen starts flashing, the capacitor discharges slowly, and only after that the relay is activated and disconnects the load.Time allotted for this whole process, is enough to ensure that burned smart electronics of modern technology.

Yes, and it will be such that it will only throw the entrails of the machine power surge.

How to make automatic protection against voltage surges with his own hands?

If available soldering and skillful hands to create a reliable defender inside the housing network very easy by yourself.It is enough to follow the exact pattern

As a result of the work and the assembly of all the parts (penny, by the way), this is supposed to be such a device

Preliminary tests for a period of six months or more have shown the reliability of the self-made machine.However, if the experience in similar works a little thin or not, it is better not to take risks and to get ready, but expensive and reliable automatic protection against voltage surges.