Articles

Recently, while browsing the archive with my old projects, I found a project that for ~ 20 years did not get a decent plate. It was designed, but I didn't really feel like it or had the skills (2 layers) to make it. As the project was quite interesting, I decided to dig it out.... [Read more]

Just because you can connect the two wires together doesn't mean you should ... but if you must, the article below will show you how. Of course, the easiest way to connect two conductors is to twist them together. If we know how to do this, the connection can be rugged and mechanically... [Read more]

I see that recently on Elektroda it is fashionable to make your own projects and 3D prints, so I will also share my construction - especially as it is practical and works well in my workshop. It is a box-organiser for 50 strips of resistors, capacitors or other SMD 0805 elements.... [Read more]

Converting a logic circuit made with AND and OR gates to a form composed of NAND and NOR gates is an excellent exercise that will help you understand the basic laws of Boola logic. The article below is divided into three sections. It is based on the homework of a student who asked... [Read more]

Hello my dears Today I will describe one of my first projects completed with the help of a 3D printer ( Ender Creality Pro 3 ). This is the attachment piece for the roller shutter Gardinia , according to my own design. This roller blind as I found it is designed to be fixed "on the... [Read more]

Hello my dears Today I'm going to describe here my screwdriver organiser/stand/segregator that mounts on the wall. I designed the whole thing first in the 3D modelling program Blender, and then printed it on a 3D Creality Ender Pro 3 using PLA filament. Project ideas The idea of such... [Read more]

Hello my dears Today I will describe here my own segment with drawers for storing small parts. I designed the whole thing first in the 3D modelling program Blender and then printed it on a 3D Creality Ender Pro 3 using PLA printer . Design considerations I made the following assumptions... [Read more]

Hello my dears. Today I will present to you my network relay driver/timer/thermometer realised in a housing from a Ferguson AF 2818 SE satellite receiver based on my runner board under PIC18F67J60. Project idea I've been experimenting with internet control for quite some time and... [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... [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... [Read more]

I received the pre-ordered (and therefore much cheaper) MUSTOOL MDS8207 multimeter with oscilloscope function. As of today, its price is quite high, PLN 385.49, but I paid PLN 286.41. The equipment came in a cardboard box packed in a bag with the Banggood logo. The box was heavily... [Read more]

Here you will find a practical comparison of the characteristics of online (VFI) and offline - line interactive (AVR) UPSs. Devices Micropower 1000VA and RTII 1000VA provided by the manufacturer Green Cell . We will not cover the basics of UPS here, but will focus on practical trials... [Read more]

1. Magnetic field in matter The magnetic field in a vacuum depends only on the electrical circuits that generate it. In material environments, there is also the influence of molecular currents in particles of matter. An electron moving around the nucleus at the angular velocity omega_zero... [Read more]

We recently presented active cooling system dedicated to smartphones ; it is not the only device that currently needs active cooling with increased computational effort. Another one is the Raspberry Pi 4 single-board computer. While the earlier, third version, was known for overheating... [Read more]

Graphical multimeter MUSTOOL MT8206 Taking advantage of the promotion, I bought such a meter on the Banggood.com portal for less than 38 EUR (160 PLN). I will briefly try to describe here why (not) it is worth buying it. The parcel arrived very quickly (13 days), it was sent by Dutch... [Read more]

Hello. I present a next plate for Retrocomputing. The emulator has: - FPGA Spartan6 XC6SLX9 - 8MB 16bit SDRAM memory - 16MB flash for core and ROMs - HDMI output - analog audio output + tape recorder input - SD slot - RS232 - 2 * joystick port - 2 * PS / 2 - A500 keyboard connector... [Read more]

Hello my dears Here I will describe my experience with running an LED driver MAX7219 and a library to support it, which I developed for PIC microcontrollers. In short MAX7219 is a cube that allows you to control a very large number of LEDs using only a few microcontroller pins. What... [Read more]

Hello, I would like to boast of a very simple but interesting device from the category: what to do with an old microwave ;) I decided to diversify my apartment a bit with a new table, it fell on an oak table with a lightning pattern, so I was forced to develop a tool for this. The... [Read more]

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... [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... [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... [Read more]

. Hello my dears . Today's topic will be the WS2812 LED driver. First I will describe its operation from the theoretical side, and then I will present my library to support it designed for the PIC18F45K50. What is WS2812? . The WS2812 is an intelligent LED controller connected to... [Read more]

In many materials, for example PCIe 5.0 interface if systems equipped with this interconnect unit appears GT / s - gigatransfer per second. What does it really mean? It appeared with the presentation of the PCI Express (PCIe) standard developed by PCI-SIG (PCI Special Interest Group).... [Read more]

Hi! Another project for my workshop equipment is MPCNC, i.e. a CNC milling machine printed on a 3D printer, today I will share my humble opinion with you (no time for testing, session at PW :( ). I always wanted to be able to precisely cut elements in wood, plexiglass and aluminum.... [Read more]

Hi! This is another construction from me :) actually made by me :) I would like to present you a cool toy for every little bit older boy/girl or for adults :) Namely this is a racing drone whose frame I printed on a 3D printer (which I made myself, to be found at this link Link ,... [Read more]

I remember the times when the bandwidth from the Internet provider was a key issue when choosing an offer. Initially hundreds of Kb / s, then single Mb / s, up to a quick jump to tens of Mb / s, then hundreds of Mb / s to 1 Gb / s. In the 30-100Mb / s throughput period, the client's... [Read more]

I haven't posted anything on the forum yet, so it's time to show something. I present for a quickly built welding cart. Construction made of 18x30x2 sections. Reinforcements for shelves - 20x4 flat bar. Shelves made of 18mm OSB. Front wheels - swivel 75mm with brake. Rear... [Read more]

The ZigBee "ConBee II" module is a new version of the ConBee USB dongle, offering an improved output signal amplifier, which translates into a greater range of radio interfaces, as indicated by the manufacturer, Dresden-Elektronik. The device uses a new 32-bit controller with ARM... [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... [Read more]

While I was doing a vise recently, I noticed that my cutting line was not straight. After putting two elements together, it turned out that there was a gap and then they had to be filled with a weld. So without thinking long, I decided that as soon as I finished the vice, I would... [Read more]