Articles

Hello electrodes. This time, the aim of the article will be to introduce you to another cheap and very useful programmer from our slant-eyed brothers. It is a UBSASP programmer, version 2.0, designed to work with AVR systems manufactured by Atmel. After purchase, we receive a programmer... [Read more]

Soon, on elektroda.pl, a WiFi module will appear with an ESP32 board and an OLED SSD1306 display. The ESP32 capabilities and the integration with Arduino are described here: ESP32 + Arduino . The English-language description of the integration is available here: ESP32 & Arduino on... [Read more]

Hello everyone once again. Today I will try to describe to you a very cheap Chinese digital thermostat W1209. To buy this thermostat, you need to spend about $ 1.30 on Aliexpress, including shipping. Prices on Polish auction portals with shipping start from about PLN 14. The device... [Read more]

Hello. Below I present to you a short description of the 150W inverter increasing the voltage - step-up configuration. Inverter data: - input voltage: 10-32VDC; - output voltage adjustable in the range: 12-35VDC; - efficiency: 6A (sometimes you can even find 10A in the sellers'... [Read more]

I am asking you for help, I need to do a paper and I cannot find information on how dependent works, like an independent isostat, how to fuse them together and what is this fusion. [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... [Read more]

DP30V5A is a 5A 32V 160W panel-type power supply module. The power supply modules are available in various versions differing in the maximum voltage and output current. DP30V5A can be powered with 6-40V. The power supply can operate in CC / CV mode and it is possible to set the maximum... [Read more]

Delivered in a tasteful tin box. The inside is lined with a tightly fitted sponge, so you have to pull a little to get it out of the box. ;) The tester comes in two versions: UM24 without Bluetooth interface and UM24C with Bluetooth. The difference in the bottom PCB, where or not... [Read more]

Hello today, my first review in this section. Panel voltmeter visible above. I decided to present an interesting voltmeter, ammeter, charge indicator and resistance measurement. All in one small device. The manufacturer named them in the PZEM-005 manual. Although it is different in... [Read more]

I saw the UT210E multimeter at the BMS and IDS installer. Although it was the first time it was used in the field, some conclusions were drawn. I borrowed a quick test meter and the device has some convenient features: - allows you to determine the presence and direction of 10mA currents... [Read more]

Everyone who came up with the idea of building a NAS based on the HP T5740 (T5745) terminal (thin client) sooner or later wanted to connect a 3.5 '' drive to it. Unfortunately, he was disappointed - the disc did not start. Meanwhile, 2.5 '' drives work flawlessly.... [Read more]

Hello. Below is a description of the sensor for non-invasive current measurement up to 30A. The sensor can be purchased on Chinese auction portals together with the shipment at a price from about $ 4.5 or on Polish auction portals from about PLN 25 with the shipment. This sensor is... [Read more]

I would like to share a fact related to the popular converter based on the XL6009, as in the attached photo. Its basic parameters are: - input voltage 3.8-30V, - adjustable output voltage 1.25-35V, - output current 3A (heater option :D ). I do not know if I came across such a series... [Read more]

Hello. A new video guide for NEXTION displays is being created. I invite you to Youtube: Playlist [Read more]

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]