Articles

Hello all. Below I would like to present you a short description of the very popular HC-05master-slave Bluetooth module with the ZS-040 base board. It is a module for wireless Bluetooth communication, equipped with a UART interface and support for AT commands. This module can be used,... [Read more]

This time it was one of the drivers that Kamil gave me for testing. It is a tiny module designed for PowerBanks. Interestingly, the invoice shows as: "STEP-UP PowerBank 2V-5V to 5V 1500mA converter". So far, I have bought these boards as DC-DC converters, 2.5V - 5V, for 5V, 1000mA.... [Read more]

I was just about to start the promised inverter tests, but this morning I got a long and eagerly awaited charger straight from China. Unfortunately, it's stronger than me and I have to check it out. I ordered the "top version", the one for $ 20.99, the V40 model. It is noteworthy... [Read more]

As I received a few converters to test and describe on the forum, I decided to start with describing the artificial load made in China, which I often use and I will also use it for the above mentioned. tests. I suspect that, as in the case of the tester, where half of the questions... [Read more]

Hello all. Below is a brief description of the power supply module for the contact plates at the output, which we have two voltage levels - 5VDC and 3.3VDC. This module can be found on Polish auction portals under the name "MB102 Breadboard Module" at a price from about PLN 6 with... [Read more]

Hello all. Below I would like to present you a brief description of the very popular HC-05master-slave Bluetooth module. It is a module for wireless Bluetooth communication, equipped with a UART interface and support for AT commands. This module can be used, for example, for wireless... [Read more]

Hello. I would like to present a self-made band saw. The assumption was to use the material that was already in the workshop, left over from various other works. This assumption was almost fully met, except for the saw band and inner tubes for a small bicycle. I will not describe... [Read more]

Ferguson FBOX ATV and Ferguson U5PVR - a new generation of devices in the Ferguson offer Ferguson introduces two interesting devices to its offer that offer full 4K / UHD HDR streaming support and - a rarity in this type of devices - the possibility of parallel operation of two operating... [Read more]

Hello. Below I present a description of the step-down converter based on the XL4005E1 chip. The prices of the converter start on Aliexpress from less than $ 0.95 with shipping, prices with shipping on Polish auction portals start from about PLN 12. The maximum input voltage for the... [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... [Read more]

Hello. Below I present to you a description of a cheap two-channel rectangular signal generator with adjustable filling. Prices in China start from about $ 1.7 with shipping, in Poland from about PLN 29 with shipping. The system is sold as a ready-made set, but you would have to solder... [Read more]

Hello. Below I present to you a description of a very cheap single-channel rectangular signal generator with adjustable filling. Prices in China start from about $ 0.5 with shipping, in Poland from about PLN 11 with shipping. The system is sold as a ready-made kit. Dimensions: 32... [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... [Read more]

Structures with inductance in the diagram are often troublesome to commissioning for electronic beginners. Some people can easily go through the stages of building AM receivers to superheterodyne receivers, for others it is a difficult barrier. Ready-made radio modules are a significant... [Read more]

Hello. I would like to present a soldering station compatible with Weller WMRP and WMRT handles. The controller is based on the PIC16F1788 chip and the program occupies approximately 1/4 of its memory space. All control is done via one knob, behind which there is an Alps EC12E2424407... [Read more]

The Raspberry Pi single board computer is a small and inexpensive computer system based on an integrated system-on-chip that has become very famous in the circles of amateurs and hobbyists. Thanks to the tremendous success of this design, numerous companies have followed suit and... [Read more]

Hello. Below I present a description of the step-down converter based on the LM2596S-ADJ chip. The prices of the converter start on Aliexpress from less than $ 1.60 with shipping, prices with shipping on Polish auction portals start from about PLN 15. The maximum input voltage for... [Read more]

Hello. Below I present a description of the step-down converter based on the LM2596S-ADJ chip. The prices of the converter start on Aliexpress from less than $ 0.60 with shipping, prices with shipping on Polish auction portals start from about PLN 7. The maximum input voltage for... [Read more]

Hello. I would like to present you a short description of a cheap 8-channel logic analyzer based on the CY7C68013A microcontroller from Cypress. This device can be purchased from Chinese auction portals for about $ 7 with shipment or, for example, from a domestic auction site for... [Read more]

Hello, The construction that I want to describe here is a modification of the existing solution, and the topic serves to convey the idea and provoke discussion about this solution. I have a CNC milling machine of my own design, in which the drive is transmitted using trapezoidal screws... [Read more]

I was wondering if this design fits in this forum, but I can see that they were already similar, so it will be a bit of a change in this section. Often I was faced with the problem of rolling a shaft (bushings, washers), and anyone who made extra money using the method: a drill mounted... [Read more]

In the 1970s, Ohm's law was so easily explained. Do you know similar pictures? Source: [Read more]

Here I present to you one of the most popular modules used to power a unipolar stepper motor. The module and the stepper motor can be purchased from China for less than $1.50 including shipping, and are also available on Allegro and other auction sites. The dimensions of the board... [Read more]

Simple TCPIP / RS485 converter. The device allows you to create a remote port rs232 / rs485 in linux and windows systems and allows communication with devices via lan / internet. The project is based on UARTtransparentbridge code, but MAX485 support has been added to it. ESP8266 programmed... [Read more]

Hello all. I would like to introduce you to a cheap Chinese MP3 player - DFPlayer Mini. The cost of such a player is less than $ 1.5. DFPlayer mini has the ability to play music in MP3 or WAV format from the built-in micro SD card reader, you can also play music by connecting a USB... [Read more]

Good morning, Today's presentation concerns my final version of an amateur oscilloscope and a generator based on an external USB sound card. Seemingly nothing special as for today's times, but the device is easy to install, inexpensive, and most importantly useful. Device... [Read more]

FIBARO, the manufacturer of a wireless building automation system, invites you to participate in practical training courses for installers, electricians, building practitioners. Participants receive certificate of completion of the training. FIBARO is expanding its network of professional... [Read more]

Hello I present the weather station on which I have been working for some time. The beginning of work is also my beginning of fun with Arduino. It started with a ready-made project of a tiny station with an OLED display. Back then, just uploading the program to ESP8266 was a feat... [Read more]

There are many factors that contribute to the proper functioning of the gears in a power tool. Grease. Type. How to replace. All of these factors are the problems that users encounter with gears. What is the correct gear? What exactly is a gear wheel. The drive, i.e. movement, is... [Read more]

The popularity of the Raspberry Pi is growing thanks to the many examples available and the development driven by the community interested in minicomputer platforms. In addition to RPi, it is worth taking an interest in alternative minicomputers, perhaps they will be better suited... [Read more]