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]

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 casing is made on a 3018 CNC milling machine from 10 mm plywood...[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 to reverse the process, and thus provide such a cell with...[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]

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]

I will show here how you can mass configure and control IoT devices flashed with Tasmota or with Tasmota-compatible, cross-platform OpenBeken . Configuration will be done by sending console commands in the HTTP GET request. This will allow, for example, to set MQTT server parameters on a mass scale, or to configure energy saving (on Obk)...[Read more]

Many new smart LED strip controllers are produced without any buttons. This makes LED control impossible without a mobile phone or a voice assistant, this also makes them useless when the WiFi is out. Here we will show you how to fix it - we will use OpenBeken to bring back the missing button to the smart Magic Home LED strip, but our guide...[Read more]

This article describes building a programmable speed regulator for brushed DC motors that are low-noise, powerful and inexpensive. Changes in temperature, voltage or motor load do not impact the regulator. Moreover, this circuit is unaffected by the motor coil’s resistance, enabling several motors in the same application without needing adjustments....[Read more]

Internet-of-things applications are built on intelligent, networked electronic devices that are most likely battery-powered and transmit pre-processed data to a cloud-based infrastructure. An IoT device uses a variety of embedded systems, including processors, communication ICs and sensors, to gather data, process it and then send it back...[Read more]

Here's a detailed firmware change guide for Magic Home LED strip which is using BL602 WiFi SoC. The video includes step by step soldering instruction showing how to connect USB to TTL converter to the board and also shows how to use BLDevCube to program new firmware. Initial device setup (AP configuration) is also included. For RGB strip,...[Read more]

I will show here the configuration and operation of the window / door opening sensor in OpenBeken , realized without TuyaMCU, i.e. based on the deep sleep of the WiFi module. The sensor implemented in this way connects to WiFi only when you need to send a state change to the MQTT server, otherwise it "falls asleep" and disconnects from the...[Read more]

The increase in the number of electric cars is transforming manufacturers’ choice of power supply from 12 V to 48 V. Higher voltages offer more power to drive power systems while reducing weight and cost of wiring. All devices in modern automobiles require more electricity, so the traditional 12-V system is no longer sufficient. The...[Read more]

Many educational platforms have been created, from very simple to very advanced. Depending on the user's requirements, one of such platforms for the youngest is the BBC micro:bit (in various versions) based on the Nordic nRF51822 microcontroller with the ARM Cortex-M0 core. For this board, many additional base modules have been created...[Read more]

Some IoT devices are powered by electric battery and rely on ADC pin to do the battery measurement. The issue is that the voltage value generally exceed voltage reference of Beken ADC pin who is by default 2400mv. So to bypass that issue Tuya implement some voltage divider activated by a relay pin. here's an example on CBU: thanks @nelliug54...[Read more]

Hello, Here's a quick Cheat Sheet regarding the available commande on SHT Sensor to be able to manage it completely. First to make command available you need to start the SHT Driver : StartDriver SHT3X it will start by default a measurement every 10 seconds. Once driver is avalaible you have access to all the command for the sensor : - Status...[Read more]

Here's a detailed guide showing how to change the firmware of new Sonoff products using BL602 WiFi module. In this case we will program the E27 B05-BL-A60 bulb and setup the BP5758 LED driver, but the similar approach can be used for many other BL602-based products. Here's the guide: Also remember that you can later pair device with Home...[Read more]

Silicon carbide and gallium nitride power devices have seen increasing usage in some key, high-growth applications in recent years. GaN is now used in mobile device chargers and charging systems. Companies like Apple, Samsung and Xiaomi have chosen GaN-based chargers that provide high power densities while maintaining, or even decreasing,...[Read more]

Thermal efficiency is a critical factor in the reliability of electronic systems. Overheating of components can cause irreparable damage, compromise system stability and shorten component life. For this reason, the selection of an appropriate heatsink is critical to ensure that electronic components operate reliably and safely. In this article,...[Read more]

In this video we'll show you how to change the firmware of Tuya smart RGBCW ceiling lamp. The following guide will include desoldering and soldering back procedure for CB2S (BK7231N module), which we will program outside the circuit with our own 3.3V power supply and USB to TTL converter. Soldering procedure will require only basic equipment,...[Read more]

Surprised by the damage to the supercapacitor, I described the repair of the fault in the topic: Damage to the EDLC supercapacitor (RTC hold). Reading the answers, I learned from @bestler that this is a standard fault and I overestimated the durability of supercapacitors supporting the operation of RTC systems in relation to traditional batteries...[Read more]