Articles

Hello! I want to present a stereo tube amplifier based on EL34, 6H8C, ECC82, EM84 tubes according to Williamson's scheme with some modifications. An additional anode voltage filter is added to the first amplification stage, and the EM84 lamps drive indicators are also mounted... [Read more]

BU-808A: How to wake up a dormant Li-ion battery? Subject: This article provides information on why batteries can go to sleep and how to restore them to service. Dormant battery Li-ion batteries contain in their structure protective circuit which prevents them from being damaged in... [Read more]

The HC-SR501 sensor is a cheap popular passive PIR motion detector. We can buy it, for example, from Aliexpress for an amount from $ 0.69 with shipment or on Allegro from PLN 6.28 with delivery. This sensor is equipped with the LHi778 IR detector, a Fresnel lens and the BISS0001 integrated... [Read more]

Some time ago I bought 2 induction converters in China, hoping that despite the simple-looking structure and a really small number of elements, it will be possible to use this device in a workshop, e.g. as an aid in unscrewing stuck screws or, for example, in the process of hardening... [Read more]

Sometimes during deployment, it is necessary to capture network traffic between devices to resolve a problem to remove obstacles. In the case where one of the devices is a computer running software, it is often enough to have Wireshark software installed and check where the problem... [Read more]

Hello all. Today I would like to describe to you the HX3208 radio for self-assembly. Such a set can be purchased on Aliexpress for $ 2.36 including shipping. I couldn't find this type of receiver on Allegro. In such a set you will find all the parts needed to assemble such a receiver,... [Read more]

The amplifier module with PAM8610 has a power connector, terminals for connecting speakers, a minijack input and a volume control potentiometer. The kit includes a small heat sink to stick to the PAM8610 chip. Class D declared by the seller suggests energy efficiency, while the possibility... [Read more]

The PAM8403 amplifier, as described on the auction site, works in class D, which suggests energy saving, while the 5V power supply and 2x3W power allows it to be powered from e.g. a power bank. You can find the modules by searching for the phrase in stores and auction portals PAM8403... [Read more]

And I am again my dear. This is another article today devoted to a simple Chinese toy for self-assembly. This time we have a "police strobe" on the wallpaper. It is a gadget for six and a half Polish zlotys, which, like the electronic hourglass that has just been described, has no... [Read more]

A Tesla transformer (TC) is usually a large, heavy device that draws a lot of power and produces voltage pulses of the order of MV. The presented assembly kit allows you to build a device referring to TC. The system can be powered with 15-24V DC, the current consumption depends on... [Read more]

I am again, my beloved readers. And this is thanks to quite a large package that I recently received from Kamil. But about this, you could read in a separate subject This time I will present you a toy that I was very skeptical about. Because who and why would buy it and admire this... [Read more]

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]