Simple indicator mains voltage
Often for stable operation of any radio equipment or anything that got in the house from the electronics required to stabilize the voltage. But for example a refrigerator or microwave does not have a pronounced stabilization in General his performance in the medium price segment, and surges very badly affect the operation of these devices, there are even cases of output for this reason. Not difficult to see that the network swims the us within 220 plus or minus percent of that way of 20%, which directly depends on how many users in the network are powered on this time. If you take the early morning in the socket you can find and V even, but if it is night, it may be W. Most of the equipment such swings are not harmful, but still there are some systems that require increased stabilization or off in a moment of strong fluctuations of voltage. It may be the case if someone includes periodically, for example welding, or in the supply cable hanging is not even loading. the
Here is when the fun begins, and how to find out what the network throws voltage You can see it on the blinking light when incandescent light bulbs in the house. And if hands not curves to construct a simple indicator of the mains voltage.
To build a simple indicator we will need three LEDs, different colors, several resistors diode, Zener diode and two diacs, here is the whole set of tools for a simple indicator of the mains voltage. The scheme is simple, the LEDs are not illuminated all the time, they light up only when the alarm threshold is performed. Such an indicator I have blocked in the ordinary case charger for cell phone, additionally it was upgraded system cutoff. Now if the triggering threshold is satisfied, then the thyristor is disabled and the supply voltage on the device is off. And as if racing cyclic and disabling and enabling frequent harms the fridge even more, then I modified and delay line for inclusion. Now if triggered the threshold to increase the voltage, the system is down. Waiting for ten minutes while in the refrigerator freon settles and again, if it throws again, and between the first and second disconnection time has passed the installation, the system is disconnected at all from the network, to manually enable.
I think the diagram to draw, but I do that it is laziness, especially her as such, then no, I drew this on a piece of pressboard, then put it back together brought to mind, and as a result, all mounted Assembly gathered in the case of conventional charging. But it is not as important as the fact that there is a topic for self-improvement. Go ahead, create new or modify old and I think you willl get even better than me. But if you are lazy to create myself anew such a device, then buy in the store for example, the network indicator from Schneider electric, and there are three phases and two, and also works with cut-off, only costs about 50 Euro and in a beautiful building, that all the difference:))
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