Articles

Can a battery "have amps"? We can correctly say the capacity in ampere-hours or the maximum current that an alkaline battery can generate, this current depends on its internal resistance. The internal resistance of a cell will depend on the type of cell and the degree of discharge... [Read more]

The receivers draw a certain current from the battery or accumulator. How long they can operate depends on the capacity of the cells that make up the battery. If the receiver draws a current of 1A, it will take a 1Ah charge within an hour. A 10Ah battery could theoretically power... [Read more]

The project aimed to create control board for half-bridge topology with the possibility of setting the frequency using a computer program. Additionally, control board has synchronous sampling of the current waveform for accurate phase and amplitude measurements and plotting the graph... [Read more]

Silicon Labs and Arrow Electronics, in collaboration with Amazon Web Services (AWS) and TE Connectivity (TE), are launching a contest to spark technology innovation to inspire the next best smart home idea. Smart home technology transforms our lives, infusing a new level of convenience,... [Read more]

Hello all. Some time ago I bought a LED current and voltage meter (4 bit, 0-100V, 0-10A) on the Chinese website. According to the description, it was to provide values with a frequency of 3 times per second. It turned out differently, i.e. he gave them less than once per second, which... [Read more]

. Hello my dears . I recently got my hands on two Ania R612 radio receivers made by Unitra. Here I will show their interior, give clear pictures of the boards with commentary and post the full manual and catalogue notes of the components that are inside. Introduction and teardown... [Read more]

Hello my dears I will describe my experience with it here ASM1061 i.e. a pass Mini PCIe SATA (two ports), which allows you to connect additional drives SATA even for a laptop. I'll test it here with two drives 2.5" . I must admit that I became interested in the subject out of... [Read more]

Hello my dears Here I will present a collection of 3D designed wall organisers/mounts for various power supplies and tools. All in one theme - and finally a library of 3D models in .blend format for download (from this you can produce STLe). I printed the models shown here on my Creality3D... [Read more]

Hello! This is my first post in this forum section, so please bear with me :) I was motivated to write this article by a post by user p.kaczmarek2, located here: He presented the operation and construction of a cheap USB hub, i.e. Chinese, which did not impress with either quality... [Read more]

Hello my dears Here I would like to share one simple way to improve the quality of photos we have already taken, namely clever light and shadow correction in the program Gimp . I'm putting this method in the 3D printing related section because the brightness and contrast problem I've... [Read more]

Recently, many Xiaomi smartphone users have faced a very unpleasant situation. During normal operation, a message about the system desktop manager crash suddenly appears. The error message looks exactly as shown in the first photo. The alert remains on the desktop all the time or... [Read more]

Physical values cannot be determined with absolute certainty. Tools and measuring systems always have a certain tolerance and are not fully immune to disturbances that introduce a certain degree of uncertainty into the measurement. When it comes to uncertainty of measurement, the... [Read more]

Hello my dears Today I will present a "smart" WiFi socket BlitzWolf BW-SHP8 , which is simply an electrical socket with a relay that can be controlled by an Android application from anywhere in the world. This socket also offers additional functionalities, such as viewing energy consumption,... [Read more]

Hello I honestly admit that I do not know yet what exactly will be built. For now, I am trying to run what I can from the interfaces available in the system. What is F1C100s? It is a Chinese SOC in the QFN88 housing with: - ARM9 processor (not to be confused with Cortex A9) - 32MB... [Read more]

Hello my dears I will describe here in detail how to configure Raspberry PI together with OctoPi to operate the 3D printer over the network WiFi . This is a very convenient solution because normally when we want to print something we have to manually put our model file (or more precisely:... [Read more]

The project was created at the request of my 8-year-old son - a fan of car driving simulators. Due to other responsibilities, it took me about 14 months. For construction, I used mainly what I had in the garage - eyelet plates for connecting wooden constructions are the foundation... [Read more]

Hello, this time something without microcontroller :) As we have plenty of masks because "we are prepared" I decided to add my 3 cents. I present an adapter of my own design for the 3M mask. It is used to connect an antibacterial/anti-viral filter (at least that is what the manufacturer... [Read more]

The material most often called thermal grease is probably one of the most important, but often overlooked, components of the cooling system of a PC and other devices. However, we often forget to buy this measure, after spending hundreds, if not thousands, of zlotys on new computer... [Read more]

The terms AC and DC refer to electric current. Indirectly, also tensions. DC - direct current - means direct current. In theory, it is a power supply whose parameters are constant over time. Most often we say that about all sources that give a constant voltage. However, no one can... [Read more]

Ground loop - what is it and what effects can it have on the operation of systems? In the previous episode, you will find information about galvanic separation . Before about the ground loop, it would first be worth explaining what ground is. In electronic systems, it is a node (that... [Read more]

Inspired by subsequent articles by my colleague tomybb, who presents us and successively shares his opinions about the tools he has, I decided to share with you my observations about precision screwdrivers of all types and various shapes. All in all, I was looking for the perfect... [Read more]

One day I was faced with the fact that I had to change my desktop computer to a laptop. The laptop is chosen, but the dilemma of what to do with the data that is on the HDD drives and there is over 4TB of them. The idea of a fast NAS server, but their price knocked me off my feet.... [Read more]

Hello my dears I'd like to share here share an idea for a practical 3D print for the home and kitchen that has already appealed to several people and allowed us to get our cupboards in order. The idea is a simple organiser/handle/hanger for pot lids. I designed the whole thing from... [Read more]

I decided to share a problem that I encountered when I became the owner of the Behringer UMC202HD rev.1.12 card, and describe the way I solved it. Maybe some of you will need it. First things first. Back in the day, looking for a card / interface for audio measurement, and on a budget,... [Read more]

Howdy! I present to you another 3D printer project that I made at home at little cost, as I had most of the components at home. This time the CoreXY My first printer: Link By using printed components, the cost of the printer is definitely reduced. The example I have built now is still... [Read more]

DUAL / QUAD SATA HAT is an extension for building a NAS server based on Raspberry Pi 4 (and other compatible single-board computers, including Rock Pi 4) from Radxa. The DUAL / QUAD SATA HAT is based on the JMicron USB-SATA - JMS561 bridge. The manufacturer DUAL / QUAD SATA HAT has... [Read more]

Hello my dears Here I will describe my experience with the printer Creality3D Ender 3 Pro . In the topic I will try to include useful and interesting information for anyone considering buying one or starting out with a 3D printer. In the topic I will not describe the obvious such... [Read more]

Here I will describe step by step installation, configuration and use free compiler SDCC for creating programs for PIC microprocessors. The whole thing will be in the form of a detailed tutorial. Due to the length of the whole tutorial, I will divide it into separate topics . In later... [Read more]

Whether you are a professional electronics designer or just your hobby, you know for sure that device testing, even at the design stage, is a must. This saves time and money by avoiding design errors before the PCB is physically fabricated and the often very expensive electronic components... [Read more]

Have you ever used the term UART only to be corrected by another engineer that it is not a UART but a USART? In some cases the two terms are interchangeable, but in many others it is incorrect to use them interchangeably. Let's take a look at what exactly USART and UART are, and... [Read more]