Assumption Half bridge LC resonant with parallel load to C topology. I don't know why but we can find information about it as "parallel resonant converter" that I think is not a true (where is parallel resonant here?) Supply voltage = 230 AC ≈ 325DC lowest frequncy = 100kHz higest current on primary winding = 800mA output voltage ≈...[Read more]

This time I present a retro-emulator on the Anlogic Chinese FPGA. The emulator has 8MB of 32-bit SDRAM embedded in FPGA. For communication with the keyboard, mouse, pad ... corresponds to the JDY-08 wireless module on the CC2541 chip which I programmed my own FW. FPGA configurations are loaded with 16MB flash on the board. The SD card is...[Read more]

Hello I present my next CNC milling machine which I have not finished long ago. The purpose is mainly: milling, engraving, cutting in materials such as: - wood - mdf - plexiglass The main assumptions are: a large working field combined with the stiffness of the structure and good material processing parameters. and it happened, the working...[Read more]

Several days before my wedding I came up with an idea to rent a photo booth for a wedding party. When I saw what the rental prices are, I quickly decided that I would do my own, because the cost of building it was close to the cost of renting a photo booth for 2-3 hours. By the way, I recorded some material for my YT channel ( JestemInzynieremPL...[Read more]

Hello, I wanted to present one more project using an ATX power supply and in my case AT. I made him a battery charger. Li-ion up to and including 5S. I looked at Interk a little and did not find anything similar, so I think it is my project, so to speak. I used it to automatically turn on the fan so that it does not make unnecessary noise,...[Read more]

Construction description The tester was created to learn how to draw patterns in Eagle and learn the basics of microprocessor programming. In addition, it is small in size. I used SMD components for the first time. Scheme: PCB view from EAGLE: Here are the pictures of the finished structure: To facilitate the exchange of the ZIF14 processor...[Read more]

Hello I wanted to present a modification of the design of the Internet radio player built only using the ESP-01 module, RC filter and a few external components. Hardware: The schematic and pcb were prepared in the Eagle program version 7.7.0. The mp3 stream decoding is handled by the ESP8266 microcontroller overclocked to 160MHz. As the output...[Read more]

Some time ago I successfully converted EPSON P50 into a printer that directly prints on the laminate. The effects were very satisfying for me, but the whole difficulty is to find an appropriate waterproof ink. I personally did not succeed in this, which is why I used the hybrid method (printing on an inkjet printer with "waterproof"inks, then...[Read more]

Commercially available reversing cameras nicely fitted into the license plate frame have in most cases auxiliary lines determining the distance when reversing. Some time ago I also bought a camera that I had in my car. The camera was connected to a multimedia radio. After selling the radio, I decided to adapt the camera for other purposes...[Read more]

Some time ago I made myself a pure Class A headphone amplifier. I am not Audiofile, but in my opinion the structure works very nicely, the sound is dynamic and clear. Unfortunately, I don't have oscillograms, however the is no noise. Over time, the amplifier has developed a DAC that converts the signal from SPDIF into an analog signal, and...[Read more]

Welcome, I would like to introduce you to a simple and easy project that anyone can quickly build. For this purpose, I used Raspberry Pi 3 model B with built-in WiFi. This is home monitoring that can be turned on when leaving the apartment. When the alarm is armed (60 seconds after pressing the button) and detects movement, a photo will be...[Read more]

1. Objective of the device I drive now with Mazda 6 from 2003. with a regular audio system (not Bose). Unfortunately, there is no possibility to connect an external source of Aux sound, eg a smartphone. I decided to make this an option, and to not have to tangle with the cables, everything was supposed to work via Bluetooth. 2. Description...[Read more]

  The assumption of the project was to create from the basics a programmer for popular Flash NAND type memory, to fill the gap in the market in the segment of low-budget programmers. Sometimes it is necessary to read the Flash NAND system located eg in a pendrive, but also various types of navigations, modems, routers, TV sets, etc. It is...[Read more]

Introducing the Line Follower class robot named Impact. This is an improved version of previous design described in the largest forum of Polish amateur robotics. The robot was created in 2011, until now he was the winner of all competitions in which he participated. The biggest success is undoubtedly the first place in the international robot...[Read more]

Hello. I would like to present the desoldering station ZD-915 that I have made. The modernization was done already in the first week after buying the device. The condenser, which exploded inside the station, contributed to this. I found that sending back the equipment for warranty repair did not make much sense and I got to work. There were...[Read more]

Hello I would like to introduce my first fully self-made construction. My goal was to build at the lowest cost of the station that I could power the Weller WSP80 soldering iron. During the construction I was learning to program in the bascom, I used atmega8. I have plans to make another station, so this one will not be modified anymore. When...[Read more]

I warmly welcome all fans of high voltage. I would like to introduce my tube tesla coil on the GU-81M lamp. The coil was created according to the diagram on page Link And what to write here, I wish you good luck in building the tlock and meter coil 1998 I used this scheme (not really) = = = = = = = = = = = = = = = = = = = = = = = = = = =...[Read more]

Hello all. Unusual start the post from thank you. First of all, I would like to thank my friend Natalii , which using a gel pen she breathed life into this piece of electronics :) . Thanks are also due to colleague Radek, who served good advice during the design of the system. I also thank my mother, who negotiated good prices with suppliers...[Read more]

At the beginning I would like to say hello, because as you can see this is my first post. After the electrode, I have been calling for a long time, but I have never been on the forum. Today I decided to take a step forward, show me something specific. The idea of the project tries as much as the world, repeatedly rolled on the forum. Nevertheless,...[Read more]

The author of the following project, having no experience with Raspberry Pi, set about creating a simple air conditioning control system. As he did very well, he decided to create the following guide so that any other person could also build a similar device. Step 1: What you'll need To compile the system described below we need: * Raspberry...[Read more]

The project below is a weather station based on a module with ESP8266. There would be nothing special about it that distinguishes it from other such constructions, if not for the optimization of the system in terms of minimizing power consumption. The microcontroller used is not very energy-efficient, so it works on average in battery-powered...[Read more]

Hello. I am honored to present my present work committed in 15 minutes during the performance of works at the end of the world, i.e. in Central Poland. Needed was a flow meter with pulse output to control the chemistry dosing pump. Of course, there are ready-made flow meters / water meters with such a function, only that within a radius of...[Read more]

Hello, I wanted to present a simple and proven (using the GLUCOFACTS Deluxe v3.05 program) cable to read data from the Bayer Contour TS glucometer.   Of course, there is nothing extraordinary here, and his advantage lies in simplicity. For anyone who needs to archive measurements from time to time and has a computer with an RS-232 port, it...[Read more]

Arduino NANO 33 IoT is a new version of the NANO module with 3.3V logic levels (note the extension modules with 5V I/O), ARM microcontroller SAMD21G18A , WiFi and Bluetooth connectivity NINA W102 , and 6-axis IMU LSM6DS3 . The PCB has a secure key storage ATECC608A used in secure communication with the Arduino IoT cloud. The board allows...[Read more]

New Arduino board NANO Every uses a microcontroller ATMega4809 AVR, compared to the previous version nano where it was used ATmega328 . On the Every version PCB you won't find a quartz resonator, due to the clock signal generator built into the microcontroller up to 20MHz. We get more flash memory - 48KB, more RAM - 6KB, and less EEPROM -...[Read more]

1. Magnetic field in matter The magnetic field in a vacuum depends only on the electrical circuits that produce it. In material environments there is also the influence of molecular currents in particles of matter. An electron moving around the nucleus with an angular velocity of omega_zero on an orbit with a radius r represents the elementary...[Read more]

Architecture RISC-V has already discussed on elektroda.pl, a set SiPEED MAiX DOCK in the price of $ 19.90, it is based on the SiPEED M1W module containing the K210 dual-core CPU in RISC-V architecture, KPU (support for artificial neural networks) and WiFi 2.4GHz connectivity (previous version M1 needed an external WiFi module, e.g. ESP8266)....[Read more]

1. Introduction Flyback converter is a buck-boost converter. It is one of the most popular topologies used to power devices with low power, has gained popularity thanks to its simple design and simple principle of operation. Many companies have added their solutions, improving some parameters; dynamic losses on the key were reduced, interference...[Read more]

Hello. Before buying, it is worth checking what version we are dealing with. The point is whether the version is original or not. If we have non-original versions, after the update you will see the message: This board is Fake!   This applies to the version with the serial number shown in the picture. Fortunately, there is an update that eliminates...[Read more]

Module WEMOS D1 mini Pro based on ESP8266EX . A detailed description of how to integrate the module with Arduino environment can be found in the materials describing the modules previously made available: Amica and D1 mini. In addition to the configuration of the environment, you will find examples of digital ( DS18B20 ), and analog ( TMP35...[Read more]

The tester automatically detects the type and layout of the lead leads of the connected component, and displays the measured parameters of the tested part. The tester is powered by 9V battery and during the measurement it draws current 12-15mA , while in sleep mode it draws current 20nA. Connect the test components to the three random (or...[Read more]

DRF1278F Dorji. The Dorji Company has made available to users of forum elektroda.pl free of charge DRF1278F modules samples based on Lora Semtech SX1278 . DRF1278F modules were tested based on documentation, manufacturer sample source code and tests performed on modules DRF4463F last year. Modules PCB have a small size, description of the...[Read more]

The Dorji Company has made available to users of forum elektroda.pl free of charge 20pcs DRF4463F modules based on Silicon Labs Si4463 . This article presents the results of external tests performed for elektroda.pl. As you can see modules have very small dimensions, but they have a lot of functionality. The module board is covered with a...[Read more]