Articles

. Hello my dears . Here I will detail the process of uploading new firmware via WiFi (using tuya-convert) to a Smart Life smart light switch based on a module with ESP8266 (TYWE3S). This is a very convenient way to upload e.g. Tasmota to various smart devices, without having to open... [Read more]

I warmly welcome Due to the fact that from time to time the topic of inspection microscopes in the "Do It Yourself" category appears here, I decided to present my solution for this device. The design is not extraordinary and innovative, it is based on an industrial camera that I recovered... [Read more]

Dear forumers, Like probably most of you, I've been struggling for years with the problem of a large number of electronic, mechanical and other small "appendages", often in individual pieces jumbled up somewhere under the OTHER label. The drawer organisers I have don't quite work,... [Read more]

There are many designs for a device that is one of the elements of the workshop equipment and it takes a while to find a diagram or description of the construction. When creating the design that I want to devote to this description, I was guided by the need to separate high power... [Read more]

Hello, This is another modification of the transformer for the welder to a more professional one. Strong power in amperes, and handles (handles) with wires of welding electrodes. Finally, the welding machine is ready for a colleague and the next one is built. [Read more]

. Hello my dears . In this topic I will look at the inside of a WiFi controlled relay called the BW-SS1, the equivalent of the Sonoff made by Blitzwolf. I'll see how it's built inside, if and by how much it differs from the more well-known Sonoff, and I'll check if it can be easily... [Read more]

Last year I bought a parkside plka 4A1 cordless soldering iron in lidl. The device is quite handy, although only thin wires could be soldered. After a few uses, the tip stopped heating up, unfortunately it is pressed with the E10 shaft. The wire inside is damaged because after time... [Read more]

In this topic, I will first show you the inside of the printer in detail HP Deskjet D1360 , and then I will show you how to use its parts with Arduino. I will specify the pinout of the encoder from the inside, write the code to determine the position of the carriage using the encoder,... [Read more]

Hello my dears I will show here how you can easily assemble your own IoT WiFi controller from ready-made modules (ESP8266, power supply, relay). In the example version, it will allow us to turn on/off one device via the Internet. It will be like a Sonoff DIY version, with a detailed... [Read more]

Hello my dears To celebrate the upcoming holidays, I would now like to present a slightly looser project. This will be a 3D printed lantern based on a 3D model available under a CC licence and my various improvements. Used 3D model The design is based on the 'asian lantern' model... [Read more]

Some time ago, while browsing aliexpress for the next thing to throw into the corner the day after receiving the parcel, I came across JDY-40 radio modules. Price $ 0.60, similar to NRF24L01 +. What is it? I decided to dig a little deeper. BK2461 - Radio SOC with the C51. OK, "biere",... [Read more]

Hello my dears I will present here my design for an external CPU temperature display from my computer. The display shows temperatures from 0 to 99C while selecting its colour accordingly. The display is made by myself from 0 based on WS2812B diodes, it is controlled via a PIC18F67J60,... [Read more]

I came across a project once David Jones uCurrent . All in all, it is a very simple system. Voltage is deposited on the measuring resistor, which is then amplified x100 and fed to the output. Unfortunately, the item is not cheap, about 70 EUR excluding shipping costs. I decided to... [Read more]

Hello I would like to present for evaluation, possibly to indicate errors and defects of my cell welding machine. I do not have access to professional tools, so the housing looks like it looks. It is made of metal sheets left over from a microwave oven, the front part is made of plywood... [Read more]

Since I bought a 3d printer I have been looking for a program to design parts. I needed a program that was reasonably easy to use and allowed me to draw relatively simple parts, „non-artistic”. After testing various things, I came across Link . For me the bomb. Online... [Read more]

The 3D printer is a subject that has interested me for a long time. I thought my own 3D printer was completely out of my reach, until I had my first exposure to an Anycubic Photon resin printer that I got for repair. Once the equipment was up and running I was able to play around... [Read more]

Hi! I wanted to share with you the description of the construction that my life forced me to make. I had some periodic heart problems and every time I got Holter it all calmed down ;) If any of you have ever tried to sign up for Holter, you know that it is not easy. He waits and waits.... [Read more]

Hi Some time ago I got some audio equipment in RACK housings. In one of them there was a 10-channel signal level indicator board and it asked to build a spectrum analyzer. The board has ten AN6884 chips and 50 3mm red LEDs, but the module was adapted to indicate a voltage level of... [Read more]

Hello my dears I will present here a short test of the E27-E27 adapter with WiFi from BlitzWolf, which allows you to remotely control any bulb with an E27 thread through our home WiFi network. In addition, in the topic I will show what exactly the WiFi module is used inside and how... [Read more]

Here I will describe step-by-step how you can design a 3D printed enclosure for your own project in the free program Blender. The enclosure shown here will be modelled on popular universal enclosures often purchased by hobbyists. Once completed, I will print the enclosure on a 3D... [Read more]

I would like to introduce a simple design of a small inverter for a 3 phase motor with a power of about 400W. View of the inverter in the photos below The inverter is powered from one phase, with alternating voltage 230 V. The output gives a 3-phase voltage 3x 230V. The inverter schematic,... [Read more]

. Hello my dears . In this short topic I would like to present the interior of an old Polish radio receiver UNITRA Sniezka R-207. The receiver presented here I rescued from electro-waste - I don't know how someone could throw it away, it is a good piece of Polish electronics history.... [Read more]

No, this is not another STM32F030 clone as the designation would suggest. It is a Cortex M0 with a pinout similar to the 8-bit STM8S microcontrollers. STM8S/HK32F030M/STM32F030: The HK32F030M has 16kB Flash, 2kB RAM and 448B EEPROM. SPI/I2C/USART/ADC present. There is no DMA, PLL,... [Read more]

I would like to present the first version of the enclosure for my low-power, noiseless mini-server based on a 480GB SSD and a Banana PI M1+ minicomputer. I designed the enclosure in Blender and printed it on my Ender 3 Pro 3D printer using PLA filament. At the end of the topic I will... [Read more]

Recently, I found an offer to sell a COB LED module with a power of 50W. I decided to check whether the given parameters really correspond to reality - below I put the results of my test. 50W COB LED module purchase I found the diode on eBay under the slogan 50W LED Chip COB 30V-36V... [Read more]

Hello colleagues. I haven't published anything for a long time. I spend more time on mechanics in the workshop. Milling machine, lathe. Today, a simple meter, a Zener diode voltage measuring instrument. Diagram from the Russian-speaking forum. Both the simple diagram and the execution... [Read more]

About three months ago a friend asked me if I would build a magnetic polisher for his friend jeweler. I asked what is it what is it? A longer discussion developed here, an exchange of a few e-mails / sms with links and I already more or less knew what a machine it was. The general... [Read more]

. Hello my dears . I'd like to invite you to my brief test and teardown of the 'smart' WiFi touch-sensitive light switch BW-SS3 from Blitzwolf. This switch allows us to control our lighting both normally and remotely via an Android app using the home WiFi network without the need... [Read more]

Recently, a remote-controlled 230V socket stopped working for me. The relay did not respond to commands sent from the 433MHz radio remote control. Such simple devices use a transformerless power supply, I suspected a short circuit on the zener diode, the reason was damage to the foil... [Read more]

I invite you to my test and teardown of the WiFi-controlled PS-16-M 'smart' socket and the dedicated eWeLink/Coolkit app for Android and iOS. The whole thing will be in the form of a detailed description-tutorial showing the configuration of the whole thing and the various functionalities.... [Read more]