Articles

Hello. I would like to present here a short teardown and OpenBeken configuration guide for LSPA9 power measurement socket. LSPA9 comes in various versions, but in this case it's based on CB2S (BK7231N) module and BL0942 energy metering chip with UART interface. I will show here step... [Read more]

Hi I present a partial teardown and functional modification OBD2 VGATE interface with a WiFi module instead of BT. This interface I bought a few months ago and used in conjunction with the android Head Unit in the car with the hybrid assistant app. By default, the interface works... [Read more]

Hello my dear. I invite you to a practical test of the cheapest solar charger with USB 5V output. This charger comes in the form of a single 26cm x 14cm panel and has an integrated converter with (if possible) a stable 5V output. In this topic, I will check whether in sunny, March... [Read more]

Nearly twelve years have already passed since the introduction of digital terrestrial television in Poland ( Digital Video Broadcasting - Terrestrial ) and a newer version, DVB-T2, is already being launched. The very introduction of DVB-T was a kind of revolution, and the complete... [Read more]

I will present here a three-color LED strip, offering control via WiFi and a remote control, model MWIR-RGB/SMD2835. I will test its compatibility with the Tuya and Magic Home applications, analyze its interior (including the 12V power supply from the set) and try to program the WiFi... [Read more]

Hello, my dears. Here I will present the theory and practice of implementing TuyaMCU protocol support. TuyaMCU is a UART-based protocol used to communicate the WiFi module with the main microcontroller of the Tuya device. This protocol is used in many IoT products, including: in dimmers,... [Read more]

Hello all, it's time to flash another BK7231N device with my Tasmota clone and pair it with my Home Assistant. This time it will be a smart LED bulb by Tuya, offering a wide range of colors, RGB and cold and warm white. 12W, E27. I will start with a teardown, then I will show how... [Read more]

Another Nixie clock built by me, this time using ESP8266. The project is based on a schematic with software found somewhere in Russian forums. The lamps in the clock are the Z573M. For control, the NodeMCU v3 module, 74hc595 shift registers and k155id1 BCD decoders were used. The... [Read more]

I will present here the interior of the garden "smart" two-channel Tuya / WiFi transmitter model CCWFIO232PK, which I received as a donation from the user @strigon from Canada to run my firmware for microcontrollers from the Beken family. The topic will be divided into two parts -... [Read more]

Here I will present the short teardown and OpenBK7231 programming procedure for another Tuya relay, which this time turned out to have a rather unusual CB2S module inside, based on the BK7231N chip (not to be confused with the BK7231T). The programming procedure will be presented... [Read more]

Hello I would like to present the effect of my experiments with the Peltier cell. Such a cell is used, for example, in car coolers, after connecting the electricity, the phenomenon of heating of one side of the cell occurs while cooling the other. I began to wonder if it is possible... [Read more]

Hello my dears. Here I will present what I think is the smallest practical 3D print for an electronics engineer that I have found myself using in a big way, a bit adapter for a small cordless screwdriver. It all started when I got a faulty screwdriver to repair, obviously without... [Read more]

I liked the Byrrt weather station Link So I decided to create my own, simpler and stupider version on the commonly available and cheap DS18B20, BMP180 and DHT11 sensors (but with a housing). I aimed at the readability of the information on the display, so there are no infographics,... [Read more]

Hello, I will present here a short review and teardown of a Chinese USB rechargeable flashlight that can also be used as a power bank. After opening the case, I will try to analyze the operation of the circuit from the inside and finally I will present a different, slightly better... [Read more]

Hello, here I will present the progress report of my work on the open firmware for BK7231T. This topic will be written in the form of a tutorial, I will present here step by step how I developed my own, cross-platform (running on Windows and BK7231T) mini HTTP server, pin configuration... [Read more]

Presenting a mini air compressor made by me using the unit from a refrigerator. The heart of the compressor is the genset pulled from an old fridge, which due to corrosion was only suitable to be given away for scrap. The 24 L tank was given to me as a gift from a friend; it came... [Read more]

. Hello my dears. . Today on Elektroda we're doing fries. In this topic, I'm going to test a 'smart' fat-free fryer, the BH-AF2 by BlitzWolf. I will try to pair it on the iPhone with two different mobile apps: BlitzWolf and Tuya, and then I'll take a look inside to assess whether... [Read more]

In this article, I will describe the reason for inventing and designing a tester for microSD memory cards, which will be used to check some interesting properties of cards. Cause of the uprising MMC / SD / microSD cards, apart from their natural applications, are also liked by fans... [Read more]

. Hello my dears. . Here I will present an unusual Tuya relay that (unlike many others) is able to remember and execute its work schedule even if the WiFi connection is lost. This is something new, as the Tuya/SmartLife devices I've tested previously relied entirely on the manufacturer's... [Read more]

. Hello my dears. . I would like to invite you to a short teardown of an old Polish Taraban 2 radio, which unfortunately came to me already in a rather bad condition. As standard, I will present here detailed photos from the inside and then post the schematic and documentation. Taraban... [Read more]

Hello. I would like to inform current and future buyers of the thermomix TM6 device about the possibility of the mixing knife wearing out too quickly (for me), which results in leaks from the bottom of the mixing bowl. During the sale, the employee did not mention anything about the... [Read more]

Good day. This year I have completed a project that I have been thinking about for a long time. It is an electronic protection of the lithium-ion battery (3s 12 V) against excessive discharge and, consequently, against permanent damage. The whole is in the form of a printed circuit... [Read more]

A few days ago one of the people asked me to "conjure" her joystick for Pegasus in the style of a stick (shuttlecock). These types of controllers were popular, for example, among Atari or Commodore consoles, while for Pegasus my eyes had never seen anything like that. So it was necessary... [Read more]

I just thought that if anyone was interested, maybe they would benefit. The test project was created in EASYEDA and it even looks quite good, after Christmas I will start it. The project itself is available in four versions: with transistors: sap15, std03, darlingtons in MT 200 and... [Read more]

I will present here a unique set of universal boards for SMT microcontrollers in cases like TQFP100, TQFP64 and TQFP48, various SSOP, SOIC, etc. filters, power block) and a large amount of free space for additional systems (prototyping zone). As part of the demonstration, I will setup... [Read more]

The presented microproject was created due to the damaged eeprom memory content in the logic analyzer clone on the CY7C68013A, commonly sold as saleae 8ch / 24MHz. Once the analyzer refused to obey, I decided to get acquainted with the topic a bit. Replacing and programming the eeprom... [Read more]

Hello my dears. I invite you to a short teardown of another 'smart' relay from the Tuya/SmartLife/eWeLink family. I will check here what elements it is made of, and (above all) what kind of WiFi module is inside. Depending on this, I will assess whether it is worth buying... [Read more]

Hello my dear friends. After a short break, I'm back to testing smart home devices. This time I invite you to a short test of the BlitzWolf BW-IS9 flood/leak sensor. Here I'll test its sensitivity, internal design (including moisture protection) and try to connect it to my own ZigBee... [Read more]

I will present here the world's first WB2S/BK7231T WiFi module programming tutorial. BK7231T chip can be found in many smart home devices, and up to this day people used to say that one cannot create own firmware for it. Nothing could be more wrong - I will show you step by step how... [Read more]

One of the most interesting technical bloggers undertook to examine over 50 models of various AA batteries, i.e. the most popular "finger". Mostly popular batteries, available both in media stores, but also in stores such as Biedronka or Lidl. Alkaline batteries, but there is also... [Read more]