Articles

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]

Temperature "stabilizer" for transformer soldering iron. For many years I have been irritated by the lack of control over the temperature of the transformer soldering iron tip. I tested various circuits, regulation on thyristor, impulse control of the soldering iron by a multivibrator... [Read more]

Effects of recent works and activities with CAN buses. I sat down and wrote soft to work with CAN BUS, it is supposed to work as an analyzer, recorder / player, bomber etc. The assumption to achieve maximum functionality with relatively cheap hardware. As STM32F103 hardware with any... [Read more]

Remote home control is becoming increasingly popular. Legrand offers very intuitive solutions that work well together. In its range of Legrand Netatmo , it has a number of solutions to make the home even more secure and convenient - with one click you can turn off all the lights,... [Read more]

Welcome. I would like to present you a simple controller for charging batteries from a small wind turbine, using a ready-made up / down converter module on the XL6009 chip. However, I must start with the fact that I have dreamed of having a small wind turbine for a long time. And... [Read more]

There is such a small, neat and cheap USB Blaster programmer for Altery CPLD / FPGA circuits, which fulfills its role perfectly. Unfortunately, it does not provide the supply voltage, which requires the programmable circuit to be powered from an external source. Different circuits... [Read more]

Hello my dears. Here I will present another simple yet practical project for which I used 3D printing. This will be a modification of the so-called "jumper shaver", more specifically the replacement of the power connector with another, more standard one. This swap saved the shaver... [Read more]

Hello my dears. The defect of a cracking plastic extruder arm is rather familiar to any long-term user of the Ender 3 printer. Virtually every plastic extruder arm cracks and quickly becomes unusable. As a rule, the extruder is then replaced with its aluminium counterpart, but here... [Read more]

Recently, you can buy interesting AM / FM tuner modules on the TEF6686 chip. Such a module costs about PLN 100 and is sold as an FM head for car radios. It has amazing possibilities, great sensitivity and selectivity, adjustable de-emphasis and filter. The module is already output... [Read more]

Hello to all users of the Electrode Forum. A bedside lamp is a simple device consisting of just a few elements. This one is designed to please the eye and `` create a mood '' while listening to music, it was made in the form of a tube monoblock. Before I get verbally lynched... [Read more]

Hello my dears. Here I will demonstrate a simple way to match any two 3D objects, for example imported from STL format. The matching will be done automatically and will allow us to print elements that can be glued and/or clamped together. I will perform the matching in Blender based... [Read more]