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Hi-Tech / Hardware

Samopal.pro

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SONY deciding to show itself in the market action cameras, produces a line of devices HDR. Beckoning customers attractive fillings — a good matrix, a fast processor, Zeiss optics and electronic image stabilizer with a small weight, the company is showing its "true face of capitalism." To control the camera available with remote viewing videos over WiFi. The remote is quite expensive and scarce — now it is available only on various electronic flea markets. But there is WiFi so you can control with your phone? Have you tried to ski or a wakeboard with a smartphone in hand? But this inconvenience is not enough. SONY, not caring about their customers, removes from Google Play PlayMemories Mobile app to control your action camera via WiFi from any mobile phone...

This music will be eternal if I replace batteries © This opus is dedicated to my research on nutrition Autonomous wireless devices within the smart home system MySensors/MajorDoMo. at First I was Li... or Rather lithium-ion and lithium-polymer batteries. for a Long time these batteries from old gadgets have been accumulating in the drawer. I thought — here it is, a universal power supply for all small microcontrollers. Moreover, voltage 3.3-4.2 V is perfect for the AVR, and all sorts of ESP and STM. For reliability you can put a LDO stabilizer of necessary capacity and have a stable 3.3 for MK and the periphery. But as it turns out, all is not well. the Batteries needed to charge. For this it was necessary to make them removable, or add to your device...

So I riveted a bunch of controllers with MySensors and plugged them into MajorDoMo via the gateway. This article is about how to live with it. After all, to connect to MajorDoMo with each device has to perform many actions: create objects and connect them to the sensors Mysensors, configure processing of incoming values, the display on the screen forms (plans, scenes), reporting sensors. To connect devices Mysensor to MajorDoMo, I see two ways: to take Maximum advantage of what we have. That is, to attach all the sensors that are connected to the system, to existing classes of the system, and continue to cling to their scenes, forms, graphs, and scenarios. To create a hierarchy of classes corresponding to my devices as much as possible to lay them in the...

External watchdog timer is a crutch for bad developers who can't develop a normal working program for the microcontroller, or steadily working the scheme. The more built-in WDT is available in most modern microcontrollers. But there are times when you have to deal with prepared Board or module with defined problems. Your first WDT I did to combat rare, but still happening sometimes freezes ESP8266. And then a soft-reset is not saved and ESP-shka didn't want to reconnect to WiFi. Distortion power external WDT solved the problem. the Second problem arose with GSM controller Elecrow ATMEGA 32u4 A9G. Here was the place to be very rarely occurring freeze of the SIM card. (By the way, this same problem happens with USB modems 3G and 4G). To combat this freeze...

Recently I designed a party of resistive soil moisture sensors. In this article I will tell how to connect these sensors to the system smart scrap MajorDoMo and make information on the soil moisture of potted plants easy to use. Before you proceed to configure MajorDoMo I'm a little bit elaborate on your requirements: the Server should do the conversion testimony of servers in a calibrated moisture value of soil, and also in the simplified concept of "dry", "humid", "emergency water". The connection of similar sensors to the system should be as less labor-intensive. All sensors (humidity and battery status) to be displayed on one screen. You must set up the notification system with specific recommendations and system-wide problems of soil humidity control...

For drilling PCBs, I use a homemade CNC machine. But it happens that for a small fee with a dozen, others of the holes to set the machine just too lazy impractical. And with a hand drill hole 0.5 — 1.0 mm — direct translation drills. So I decided to make my own little machine, since there is a 3D printer for production of structural elements. Accessories the modernization of the two lathes left polished shafts guides with end thread, SC8UU linear bearings and a pair of springs from antilipemic nuts. And the old laser printer motor RM1-4617. To the motor is left to buy the only tube for drill. For those who have not lying around in the bins a lot of unnecessary piece of iron, giving credit for the purchase of spare parts Linear bearing SC8UU — $1.7 2pcs x...

In November of last year, I bought on Aliexpress a good clone Prusi I3 with a steel frame For the 7 months I spent almost 5 km of plastic and remembered with horror the days when life sorry eked out without a 3D printer. All the small improvements to this printer, I did and was already thinking about a major upgrade. But life decided otherwise — the old printer managed to attach in good hands. And here, again, the meal of choice. Budget found themselves $300 and it was decided to stay on the "flying bear" Flyingbear P905, but a guru with 3DTODAY advised to look at Chinese Ultimaket 2 CL-206. Drew, liked, bought, on how and review. the Printer Ultimaker-2 CL260, as proudly written in the product description. The cost is $320. At the time of purchase was a...

Year of operation of the controller control the fan in the bathroom on the ESP8266 has revealed a lot of shortcomings in operation. Although integration into the MajorDoMo of this device was a great success, the main of them created problems "Hang up" of the controller in the absence of the server or wifi, associated with timeouts in the TCP/IP Protocol controller Reboots during intensive information exchange with the server is Remote on button the fan out of the toilet constantly catching interference, causing a false on / off Experiment with MQTT protocols/HTTP and other, nothing has changed. 100% reliability and did not work. When looking at ways to solve the problem is to get back on the Atmega328, go to ESP32 or look for more stable firmware ESP8266...

Weather station with NRF24L01 works for me for several years. Problems with the sensor. Several times in the rain sensor was no longer transmitting, but then everything was restored. Recently I was able to the indicator. Likely to oxidized contacts. Or posting somewhere disappeared. Still suspended mounting — not the most reliable things in the world. The main drawback of existing solutions is the lack of backend. I would like to be able to put all the data into a single system with the ability to display and use this information for other components of the smart home. End of the long preamble. Next is an article about the new weather sensor at the base of the module with BME280, NRF24L01 Mysensors library and connected to the Majordomo server. Technical...

How many reviews dedicated led for plants. How many copies broken in heated debates about their usefulness for plant growth. In this review, I want to investigate whether all the LEDs sold on the open spaces Aliexpress and other Chinese stores are the same. a Little bit about the design of LEDs the Led crystals emit almost monochromatic light, depending on the semiconductor material. to get yellow, white or the same "full of plants" emission spectrum — apply the phosphor coating, which converts the primary radiation into a secondary method photoluminescence Typically, such a led consists of a housing with the substrate and the terminal, which is soldered or welded to the led chip silicone lens forming the radiation direction, the strip with phosphor and a...

In this article overview of the printer ZONESTAR P802QSU clone Prusa I3 with a steel frame. Need become a cheap printer to print prototype buildings of different devices. the First thing was the idea — to collect myself. Because the experience of design and Assembly of CNC machine was already. But the study RepRap.org and smachivanie certain projects, as well as reading the relevant forum and sites showed the following Savings when you purchase the individual parts are very minor (if any at all) than buying a similar ready-made kits for Self Assembly build your first printer may be delayed for several months As a model self-assembled the printer's function from so many unknown So it was decided to buy ready-made kit. The choice fell on the printer ZONESTAR...