Articles

Hello my dear readers. One of the gadgets I found in the test package I received from Gulson was an electronic self-assembly hourglass, the so-called DIY Kit. For the price of about eleven zlotys, we can buy ... Exactly what? Because for me it is a completely useless gadget, but more... [Read more]

I greet you cordially. As in established by me poll for a decisive lead, a mini metal detector for self-assembly has come forward, this is where we will start a series of articles devoted to gadgets. At a Chinese auction, you can buy this gadget for about six Polish zlotys. It's... [Read more]

Soon in Elektroda.pl gadgets A kit will appear that allows you to build a simple regulated power supply with voltage and output current readout. Inverter module descriptions DC / DC buck 9A 300W 1.2V-35V and a panel current and voltage meter DSN-VC288 can be found at elektroda.pl.... [Read more]

The W1209 thermostat can control a heating or cooling device. The LED display shows the current temperature with a resolution of 0.1C, measured with a sensor based on the NTC element. The simple menu of the system allows, among others, to define the type of controlled device, calibrate... [Read more]

Hello again, everyone. Today I will try to describe to you once again the TEA5767 radio module from NXP, but today it will be based on a more extensive set and will also be about reading information from this module. Below you have a link to the previous description: The set described... [Read more]

Hello my dear readers. I was gone for a while, because there was a lot of work and some holidays on the way, and some spring sickness spread me. Anyway, I'm here again :) . Today I will review a very simple function generator from our slant-eyed friends. The generator is based... [Read more]

Hello again, everyone. As the postman with the long and impatiently anticipated yellow envelope visited me, today I will try to briefly describe to you here the gadget that was inside - a digital FM radio module made on the NXP TEA5767 chip. This module is.... I would say it's... [Read more]

In the material below, the author describes how to use Arduino and an RFID reader to build a simple lock. In this system, Arduino reads the RFID tag ID with the help of a special reader. The identifier is displayed on the OLED screen, and if it matches the number stored in the system's... [Read more]

Soon on elektroda.pl there will be a DC / DC step-down converter module with output voltage adjustment by buttons and output current measurement. Measurements and settings are presented on the backlit LCD display. Maximum input voltage 23V (recommended 20V), output voltage adjustable... [Read more]

Hello, my dear electrode colleagues. Today I decided to present you a cheap Chinese voltmeter and ammeter, in one neat panel housing. The purchase cost is about PLN 6 I decided to take this step due to the fact that in a certain thread on the forum, there is a discussion about the... [Read more]

Soon, the DDS generator will appear on elektroda.pl in the form of a mounting kit. The DDS generator allows for the production of 1,2,4,8MHz square signals and signals with a frequency adjustable up to 65KHz, among others with the shapes: sine, rectangle, saw, triangle and noise.... [Read more]

Hello again, everyone. Today I will try to describe you the Chinese regulated impulse power supply by GOPHERT, model CPS - 3205. Perhaps this description will encourage you to buy this power supply, discourage you or help you make a decision. I bought my copy on Aliexpress for $ 44.98... [Read more]

What is it and how did it start Recently I did an alarm with a gsm notification. But the alarm itself communicated with the phone via a serial connector, providing number identification and specific information sent by SMS. However, in many cases, the details of motion detection are... [Read more]

The split-core current transformer shown in the photo is available at a low price on many auction portals and online stores. The transformer has the parameters of 100A / 50mA. So when 100A alternating current flows through the cable through the transformer, the AC milliammeter at... [Read more]

The project below is a weather station based on a module with ESP8266. There would be nothing special about it that distinguishes it from other such constructions, if not for the optimization of the system in terms of minimizing power consumption. The microcontroller used is not very... [Read more]

Construction description The tester was created to learn how to draw patterns in Eagle and learn the basics of microprocessor programming. In addition, it is small in size. I used SMD components for the first time. Scheme: PCB view from EAGLE: Here are the pictures of the finished... [Read more]

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]