Design and development of smart home systems

Part 1


Greetings to all who are engaged in electronics, programming, etc.! This series of publications will be devoted to the design and assembly of the smart home system.

This system will also include:

- Input filter voltage regulator approximately 10kW.
- UPS for smart home system, apartment lighting, as well as low-power equipment. Approximate power 4kW.
- The system itself is a smart home, with a large number of modules, sensors and actuators.

A little about myself - I am on childhood disability, in 1998 they gave the 2nd group, 3 categories of disability (this is the old way), now this category is equal to the 1st group of disability. I received this group because of a whole bunch of congenital diseases, but mainly because of a congenital injury received at birth (the midwife dropped on the tiled floor, head down), so that her minor diseases can not see the eyes, heart disease and hemophilia (no clotting ).

Since childhood, as I can remember, was fond of electronics. Always something soldered, designed, assembled from old parts. I remember assembled the device so that on the twin line (blocker), like this:


It was possible to connect the modem and caller ID, as well as a lot more. It turned out well, then spent hours at night on the Internet.

Unfortunately, there was no scheme left, it was in 2002, and the device was left at the sale of an apartment, then they threw it out when the blocker was removed.

Then I switched to computer devices, but since the city is small and there are no shops of radio components, the assembly was already difficult.

My publications will be published as far as possible, at the design stage they will be published more often, but at the stage of manufacturing ready-made modules / devices it is most likely rarely. The reason - as I wrote above, we do not have stores of radio components, I even take solder in a car shop.

That's how they cheated us, and to order via the Internet, wait a long time. So with some parts I will have to tinker, for example, look for where to order, wait for a pension, then wait for the parcel.

You ask why do this (why need) such a project?

Well, I will answer point by point:

1. The most important, because of what I started all this - is a constant interruption in the electrical network, the voltage floats, the noise (in the speakers of the computer hum, cod, explosions, etc.). Lamps (even LED) are on, computer power supply units, washing machines, refrigerators, in general, everything is on. Now I have everywhere where it is possible UPS budget. Electricity networks do not react, they unsubscribe that the electrical wiring is old, you need to change it all over the house, naturally at our expense.

2. I can not sit and do nothing when I do not do anything with me, PA (Panic Attacks) begins - these are panic attacks, with an increase in heartbeat, pressure and fear of death. I need to occupy my brain with something so that it does not go crazy.

3. I want to do something on my own, better and cheaper. And also in the process to understand how it works.

4. I would like to share my developments with the community, so to say leave a trace. Something to learn from the community.

I will design modules and devices using modern elemental base, in some places I will try to use ready-made devices.

When designing, I will try to explain my choice in favor of one or another component, I will try to answer questions, suggestions, criticism.

Transformers, chokes, I will wind independently, it seems it turned out earlier. But the printed circuit boards, most likely order. A lot of things needed for their manufacture, a lot of time will be spent on the purchase of all necessary.

In parallel with this cycle of articles, I will post articles on component reviews of the project, try to do comprehensive reviews of all components, their minuses and advantages, what to look for, etc.

What do you get at the end of this series of articles?

You will be able to repeat any module or device as a whole, you may receive additional knowledge on the components.

I will lay out all the source code of the project, schemes, printed circuit boards, codes for firmware controllers, programs for Windows, Linux / Unix, Android (On iOS there is no possibility, no device), source programs.

Technical task of the project and its characteristics

- Voltage stabilizer power: 10 kW
- Input voltage range: 85 - 265 V (with a large margin)
- Output voltage: 230 V + - 3% (Standards)
- UPS power: 4 kW
- Voltage on DC bus: 48 V (I have not yet decided on the exact figure, but most likely it will be so)
- Starting currents on the stabilizer and UPS: + 650%
- Possibility of remote access to the system
- Lighting in the apartment is led from the DC bus
- Powering the entire system from the DC bus
- Transfer of the socket from the UPS to the stabilizer (and vice versa) when the current consumption is exceeded (lowered)
- Temperature sensors in each room, on the street, in the stairwell
- Atmospheric pressure sensor
- Lighting Sensors
- Water leakage sensors
- Smoke detectors
- CCTV system
- Touch switches, brightness control (not yet decided how to adjust)
- Sockets with protection (there are small children)
- Touch screen to display information (because ready is expensive, I will do from a laptop or monitor)
- Electronic locks, where possible.
Maybe I forgot, in the process I will add


The prologue has come to an end, I plan to break this cycle of articles into 20 or more parts, because There is a huge amount of information, mainly preparation and design.

I will do so, the description of the module, design, build, debug. This is in order to see the result of a series of articles, if we start describing the design of everything and everything first, I think interest will die out quickly.

I also want to contact the community if you know good online stores (except for chip & dip), write in the comments. I would be grateful for any help in this matter.

All articles will be accompanied by a detailed photo report, possibly a video.

I intrigued you? If so, wait for the next article.

The next article will be devoted to the description of the necessary tools and programs for starting the design and manufacture of the system.

Constructive criticism is welcome.


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