In older electronic equipment that has been withdrawn from use, you can find interesting elements, including various types of microcontrollers. Although nowadays 32-bit microcontrollers with high computing power and network interfaces are easily available for a small amount of money, sometimes an older 8-bit chip, obtained, for example, from...[Read more]

Hi. Due to the fact that I would like to professionally deal with hardware design, I decided to work on a modest portfolio. I'm still learning Altium Designer, so I'm looking for interesting ideas to implement. In this case, it is also my first 4-layer board and I must say that from now on I will only make such ;) This is also the...[Read more]

I would like to present my fifth SLO (probably it's starting to get boring) in the war-military version, i.e. stylized as the front gear, this time of Major Mykhailo Soldanovych from the Azov Regiment. Why? Because now we have a war in the east, and the amplifier is built on Soviet TS-250-2M transformers (as output), ST-270 (as power...[Read more]

Description and presentation below , designed and made by me, clock based on VFD IV-17 tubes . The impulse to make the clock is largely inspired by the video presentation of the Wiktor clock in action: The design uses the application notes of the VFD lamp Having previously made a clock on the IV18 lamp (and gained some experience), I decided...[Read more]

Hello everyone :) In particular, lovers of lights, illuminophonics, etc. The presented device displays the acoustic spectrum in the form of 20 bars, 16 points each. It's hard to call them a spectrum analyzer. I associate the analyzer more with a measuring device, although the frequency display is quite accurate here, which cannot be said...[Read more]

At some point, I decided that using the same equipment by two people is neither a good nor practical idea. There was a need to make a second soldering station (for my son). The purchase was out of the question for ambitious reasons, I did not want to build something more complicated than the absolute minimum. It was supposed to be small,...[Read more]

"Almost" acoustics ;) No miracles, a VU indicator for the amplifier. Project from Changes in the schematic include power supply from the power amplifier through two series regulators, and input level adjustment on the PRs. My contribution is the plates making it a module for the front panel: PCB in lay6 format.[Read more]

I did not find a voltage regulator on Mosfet N. Maybe the factory ones are in this technology, but they are usually sealed and you can't look. One thing is certain, these are one of the most emergency components in aggregates. The one I cobbled together should be more resilient. A description of the action. The voltage divider is on the...[Read more]

At the beginning, an explanation to the title - it is not a typical thermometer, because it does not measure anything, but simply displays the temperature taken by other sensors. However, I found the "temperature display" to sound strange. But "to the bedroom" has its justification, which I will write about later. Some history Indications...[Read more]

The growing popularity of VFD displays, their relatively low price and interesting appearance prompted me to build a clock based on such a display. The heart of the clock is one of the oldest specialized Soviet microcircuits for electronic clocks made in the p-MOS technology КР145ИК1911 (KR145IK1911) in a 40-DIP housing. The system has the...[Read more]

There are thousands of DIY mower projects online, this one probably doesn't stand out from the others, but since I haven't seen a similar project in this section for a long time, I decided to share my experience. This is the first prototype that verifies the basic assumptions in real life. The device during operation. The idea of...[Read more]

A simple but effective 2.4 GHz jammer. This module can block BT and Wi-Fi. I designed it so that the cost of its implementation was as low as possible due to the semiconductor crisis. The circuit includes a simple astable multivibrator with a square wave to saw converter for generating the VCO control signal. The 5.1V power supply is provided...[Read more]

Hello. This time analog retro. The AM receiver on the basis of the article from Young Technician from the 1980s. Radio to receive "Polish Radio Program I" on long wave, at 225kHz. The UL1111 radio is the first chip I have assembled. It was a "RADIO HOBBY" set bought around 1990. In the presented UL1111 receiver I replaced with BC847CW transistors....[Read more]

Hello I present my door control devices in my Opel Astra H. The device is based on the Atmega 168 and the MCP2515 module schematic for communication with the can bus. I used the HC-06 bluetooth module to communicate with the phone. The phone application was written in Mit App Inventor. Functions: - closing the door with the windows closed...[Read more]

Hello I've always wanted to build a musical tesla coil, but I was overwhelmed by the complexity of the design schematics found on the internet. Some time ago I found a schematic of a single transistor based coil and decided to improve it so that it could play sound. I decided to share the project so that others could make such a simple...[Read more]

The topic is related to: edu elektroda.pl # 04 operational amplifiers - LED current stabilization FAQ LED flashing to the beat of the music As you can see, a lot of space is devoted to LED flashing to the rhythm of the music and why set up a new, related topic? The reason for this is the designed chip, the Chinese putty, which needs the fewest...[Read more]

Hello, after a long break. This time the Chinese ... chip from Taiwan was used to build an IR remote for TV from LG. The remote control can turn on / off the TV, change the channel or the volume. The number of functions has been limited due to the small number of IO of the microcontroller. The used PFS154 can be changed to PMS150C after a...[Read more]

What some on the forum know is that I like LED blinking. In this project, I gave it the maximum vent and was able to get carried away by the wave to such an extent that by the end I had had enough :) You remember Earth Command Center by colleague @ reaven22? Yes, it was his design that was the inspiration for my construction and even for...[Read more]

Hello I would like to present the 1.9 DIY-A586 version, with the modifications that have come to my mind over the years. I skipped a few numbers so that I would not be tempted by another v1.x from XC6SLX9 :) . Differences: 32MB RAM, JOY1 / 2 without multiplexing, 2 flopps without additional circuits, 18.432MHz generator, space for THT LEDs,...[Read more]

Hi. I made a power supply, nothing innovative because it is a good construction that has been going through the internet for over a dozen years. With this construction, I put more emphasis on the design (at least I think so). Despite quite a long thought process, this power supply was not without mistakes. Fortunately, these errors do not...[Read more]

For some time now, I became interested in network security and came across an article on how to make a Wi-Fi Jammer (deauthentication attack). I did not even suspect that you can make someone's life so easy and simple. To make a Jammer All we need is esp8266. The principle of operation is very simple. Our device pretends to be a router...[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]

Do you have audio equipment that is too old to support Apple Airplay that you want to use? You don't want to replace it with lower-quality wireless speakers, but want to listen to music from the Internet? This is a common problem. The good news is that solving this problem costs as much as the Raspberry Pi - not much. Based on this minicomputer,...[Read more]

In the material below, the author describes how to use Arduino and an RFID reader to build a simple lock. In this system, Arduino reads the RFID tag ID with the help of a special reader. The identifier is displayed on the OLED screen, and if it matches the number stored in the system's memory, it displays the word "Unlocked", it can also...[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]

Currently, in the era of simple and inexpensive GSM modules and Arduino modules, it is very easy to construct an SMS-controlled relay. In the project below, the author used the SIM800L module to receive SMS messages. The whole system is controlled by the Arduino Nano V3 module. The system is equipped with one relay, which is controlled by...[Read more]

Thermal imagers have been fascinating for years. The idea that you can watch images in a part of the spectrum of electromagnetic radiation, inaccessible to our eyes on a daily basis, is extremely interesting and appealing. Unfortunately, the implementation of this task is not cheap - especially if we want to buy this type of camera only to...[Read more]

Microchip ATM90E26 is an integrated circuit dedicated to use in modern power consumption monitoring systems. It allows for easy integration with advanced monitoring systems of the power network within, e.g. our home. The use of such a system together with, for example, photovoltaic systems allows you to monitor the level of generated energy,...[Read more]

Most computer platforms have the ability to connect sensors that operate in the audio band (microphones) or in the visible light (e.g. cameras). However, sensors for electromagnetic radiation in the radio range are not popular and until recently it was difficult to connect to computers systems allowing for any collection of radio waves. In...[Read more]

Pigeon is a simple webcam, dedicated to work in the cloud. It is based on the Raspberry Pi Zero W, costing just $ 10. The minicomputer, together with the camera, are enclosed in a housing made in 3D printing technology. A simple handle is integrated with the housing, which allows it to be mounted anywhere, e.g. on the wall. The software itself,...[Read more]

In Brazil, the Raspberry Pi Zero overclocking record has just been set. The team managed to achieve a clock frequency of 1600 MHz and test such an extremely overclocked computer. This gave them the first place in April in the HWBOT ranking for SoC BCM2835, which is in RPi Zero. The whole overclocking began with one teaser on social networks,...[Read more]

The description below shows how you can convert a Raspberry Pi with a GSM modem to USB into a gateway for sending SMS via the web interface. The project was created using PHP and C #. The software that communicates with the modem is written in C #, and the web front-end in PHP. In addition, the system is equipped with a PostgreSQL database,...[Read more]

The environment monitoring system, based on the LoRa IoT interface, consists of a base station built using the Arduino Mega module with a LoRa gateway and remote stations based on the Arduino Feather, which connect to the base station via the LoRa radio interface. The system allows monitoring of environmental parameters in the house and its...[Read more]

Pi-FM-RDS is an FM radio transmitter equipped with RDS, running on Raspberry Pi. The GirHub downloadable program is responsible for generating a frequency modulated (FM) waveform with encoded RDS data (data transmission system with audio transmission). All this works in real time and is able to work with both mono and stereo audio signals....[Read more]

The electronic fuse eliminates the need to replace the element that burns out with excessive current when using a classic fuse, e.g. a fuse. This element does not act as a current limiter in any way - when it rises above the set limit, the system disconnects the circuit. The limiter would instead limit the flowing current to a predetermined...[Read more]

This simple device has one task - it converts received exiles, broadcast in a walrus alphabet, to Latin letters. This translator can find many applications. With it, you can train your morse broadcasting skills, but also decode data received from the ether. It may be amazing, but the walrus alphabet is still very popular in amateur radio,...[Read more]

This article will describe how to display and record car diagnostic information with a Raspberry Pi. Step 1: Required materials To complete this project you will need: o Raspberry Pi Model B or B + o Car stereo (must have an AUX socket) o Bluetooth adapter o Car charger o USB or Bluetooth adapter based on ELM327. o RCA cable o Keyboard (optional)...[Read more]

Spot welders are used in almost all plants where it is necessary to join sheets. The advantage of welding machines is the precision of joining (with very good electrical contact), and a very low voltage between the electrodes, which makes the device safe. The presented device is of course not a professional welding machine, but an amateur...[Read more]

Hello. I made a soldering iron for plastic. I saw a similar company, and that the construction is very simple and you have to pay for welding, it is worth doing. 5mm diameter, 2m of hose, a piece of cable with a plug. The required pressure is 0.5 ÷ 1.5 bar. I used a simple regulator on a triac to regulate the heater. And the cube to connect...[Read more]

The idea came from the fact that the 5-year-old daughter is willing to drive all kinds of vehicles. He packs on a motorcycle, he wants to drive the car, he stays in the tractor with his grandparents, etc. So I decided to build something for her that would allow to develop certain habits of the driver and provide a dose of adrenaline and child's...[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 a project done (almost a year ago) quickly in order to show the younger generation what can be done with the idea of some parts (the rest can be done). Hardware: Robot platform bought from China Adruino on the atmega 328 Double H-bridge controller for motor control Converter from 12V-> 5V for the webcam WiFi camera dcs-5222l Akku 11.1V...[Read more]

Hello. I would like to present an electro-spindle made by me from a 2.2kW 2800rpm "dachshund" type engine. The design was created for use in a small universal milling machine for machining aluminum and steel. I decided on my own design, because within the budget I would have to choose a liquid-cooled Chinese reaching 25 thousand rpm, but...[Read more]

Hello! I would like to present the Bethlehem Star I made two years ago. The entire structure is made of sheet metal. There are 78 5mm LEDs in the drilled holes (34 red, 33 yellow, 10 green, 1 blue). The star's tail is the ne555 + cd4017 base configuration. Three series-connected LEDs are connected to each counter output. The center 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]

Latest OpenBeken devices can be automatically configured with just a few clicks - figuring out device template manually is no longer needed. OpenBeken is now able to extract Tuya JSON configuration and import it for most of the devices available in the market. In the past, in order to, for example, figure out to which GPIO relay is connected,...[Read more]

Recently, I was running a simple system for reporting energy measurements via a WiFi network from a "smart" electrical outlet and I needed a convenient way to test the reception of HTTP GET and POST requests. I will show here how you can use Node.js for this purpose. Node.js allows you to quickly and efficiently set up a mini-HTTP server...[Read more]

Recently, I presented the interior of a cheap smartband with a BT interface, a color display and several functions typical for this segment Now I will describe how to start programming this system. The band is controlled by SoC DA14585 from Dialog (Renesas) with an ARM Cortex-M0 core. It has 96 kB of RAM and 64 kB of one-time programmable...[Read more]

Tuya-cloudcutter provides a method to change the firmware of BK7231 device via WiFi, without the need to open device case and solder wires. This is a great opportunity for beginners and people who are unable to solder, to get their Tuya devices running 100% local and cloudfree. Tuya-cloudcutter support is added per-device, in a form of device...[Read more]

Here's a step by step guide showing how to use OpenBeken to create a simple Weather station with DHT11 sensor. The guide covers OBK programming (for W600 platform), initial setup (pairing with WiFi), then shows a short example showing how to use a LED and Button with OBK, and finally, covers DHT11 support to get humidity and temperature reading,...[Read more]

Changing the firmware of an IoT device usually takes place in two steps: first, a new batch must be uploaded (usually via UART), and then the new firmware must be properly configured to work with our equipment. This configuration includes assigning the role to selected GPIOs, i.e. determining on which pin there is, for example, a relay, on...[Read more]

Here I will show you how to flash a new version of TYWE2S (ESP8285) Tuya WiFi module. Old TYWE2S had GPIO0 pad on the back, but this TYWE2S comes without any extra pads and has no markings. I've received one in a LSPA9-like smart socket with BL0937 power metering. Here I will attach the full pinout and mapping of this module. This module...[Read more]

Every OpenBeken/Tasmota/etc device requires a brief configuration after the initial flashing of the firmware. This configuration requires setting a proper roles for GPIOs, which are different for each device. Here I will show you an automatic way to configure GPIOs in OpenBeken. In OpenBeken, you can import GPIO directly from Tuya settings....[Read more]

Here's a step by step guide showing how to make a BK7231 development board (WB3S and CB3S versions) from a very cheap NodeMCU ESP8266 board, by doing a simple WiFi module transplant. First we desolder ESP12 module with a hot air station, and then we solder a CB3S (or WB3S) in it's place. Our guide includes some basic soldering tips, so even...[Read more]

I will show here how you can use the OpenAI API to create a smart home assistant. Our assistant will have ChatGPT abilities, and at the same time will be able to control the status of lights (and other devices) in our house. The assistant will understand complex language commands, and will even be able to deduce from the context of the conversation...[Read more]

I will show here how to run ChatGPT on ESP8266 - not directly, of course, but through the OpenAI API. I will demonstrate a simple code that sends an appropriate request to the API via HTTPS, along with an overview of the API key transfer and JSON format support. The result will be the ability to query the famous Chatbot directly from ESP,...[Read more]

This assembly is universal. Suitable for all types of AC devices. You can control the device manually through SW1 but remotely only when SW1 Closed. And you need to configure Startup like this: When SW1 opened, Sonoff Offline. In order for Sonoff to stay in line with SW1 Open, we added D1. Now with SW1 closed the bulb turns on normally, but...[Read more]

I will show here how to create a website for any IoT device on multi-platform firmware OpenBeken , although the same approach will also offer compatibility with Tasmota (compatibility of sent commands and returned JSON format). We will write the device control page in HTML and Javascript, we will host it on the IoT device itself in the LittleFS...[Read more]

Here is a small program that allows you to analyze the content of TuyaMCU eavesdropped packets. The program shows the type, length and content of the packet, broken down into dpID variables, their types and values. The program allows you to quickly find out what the dpID we overheard contain - whether it is, for example, a dimmer value or,...[Read more]

Here's a short 25VQ16ATIG flash memory reading/writing tutorial with CH341 dongle and Neoprogrammer software. Video also includes desoldering/soldering guide for a memory in SOIC/SOP package. The method shown here can be used for any SPI memory, including BIOS from a computer motherboard, but here we will use an IoT device WiFi module as...[Read more]

Exciting news! We have recently upgraded our AI system to the latest and most advanced version yet - GPT-4.0. As one of the select few with access to this cutting-edge technology, we are thrilled to offer you the opportunity to test it out for free! Our previous version, ElektrodaBot, although helpful, occasionally provided misleading answers...[Read more]

Here's a quick guide showing how to desolder a WiFi module with TYWE3S footprint from a smart device. The guide covers usage of flux, extra leaded solder and IPA PCB cleaner for a reliable WiFi module replacement process. Soldering the WiFi module back in it's place is also shown in the video. Our tutorial can be very useful for anyone willing...[Read more]

At times, we are faced with the choice of buying larger solar panels to produce more energy. However, this is not always the best choice. In fact, in many cases, the best solution may be to change and improve the tilt of the solar panels rather than increase their size. In this article, we will see why the tilt of solar panels is so important...[Read more]

A new user has joined our community - ElektrodaBot, an artificial intelligence that knows the answers to almost all questions. Whether these answers will be correct, we will find out in this thread. It will be an interesting experiment and fun. Whenever we need an immediate answer from the artificial intelligence, we can simply write to ElektrodaBot...[Read more]

Here we will show you how to use Tasmota Device Groups to pair multiple smart bulbs with a single smart switch. The smart switch will run OpenBeken and will allow you to control the lights power state, dimmer, color and temperature with the single button. The switch relay will always be on, and the smart bulbs in the lamp will follow the...[Read more]