Articles

The smart home is a technology that for years has been seen as an upcoming new opening in the electronics market. Every year, there are more and more products designed to create home and building automation installations. Their performance and functionality are also steadily improving,... [Read more]

When testing, for example, power supplies, an electronic load is useful to, for example, force the flow of a specific current. In practice, light bulbs are often used quickly (which is a bad solution due to the low resistance of the cold fiber), resistors, or a random transistor on... [Read more]

Today we have "on the wallpaper" a small active artificial load of Chinese production. I still have to describe a few, if not a dozen, gadgets from the series "This is popular on Aliexpress, let's check why". And the vacation is exhausted. So you will not be bored As always, first... [Read more]

Today I am going to present to you a Chinese component tester received, from Gulson, for testing and reviewing, with the symbol MG328 Not to be confused with the previously presented GM328 . The main advantage of this tester is that it can work with a Lithium Ion battery and can be... [Read more]

The module you see in the picture can be found on auction sites as a 40W 12DC to 220VAC converter . Seeing the design of the device in the photo, I wasn't expecting much for the price of $ 2. I was hoping that the module would work and allow you to power a 230V GU10 compact fluorescent... [Read more]

I've been mulling over the idea of converting my wired Philips headphones, into Bluetooth headphones, with the option of a cable. I also want to convert my Dad's headphones (can't remember the manufacturer, but they play very decently). Admittedly, I already have one Bluetooth headphone,... [Read more]

Using the camera module OV7670 we can process an image with a resolution of 640x480 in our project. The VGA resolution may seem ridiculously small these days, but at a low cost, we can enrich our project with the possibility of processing the image from the camera. The mentioned 640x480... [Read more]

Several days before my wedding I came up with an idea to rent a photo booth for a wedding party. When I saw what the rental prices are, I quickly decided that I would do my own, because the cost of building it was close to the cost of renting a photo booth for 2-3 hours. By the way,... [Read more]

Hello, I wanted to present one more project using an ATX power supply and in my case AT. I made him a battery charger. Li-ion up to and including 5S. I looked at Interk a little and did not find anything similar, so I think it is my project, so to speak. I used it to automatically... [Read more]

What happens when AC voltage is applied to the capacitor legs? This element behaves differently than a resistor - the resistor allows direct flow of electrons. The current through the resistor is, according to Ohm's law, proportional to the voltage drop across it. In the case... [Read more]

In the next article devoted to the gadget that has a chance to appear in the Elektrody shop, I would like to present you a very small and handy multimeter (or actually a "multimeter") of Chinese production (of course, of course). For the price of about five dollars, we can buy a very... [Read more]

Rotary encoder - pulser - is an excellent input device for controlling e.g. menus in the device interface. In the following tutorial, we will describe how to use a typical pulser in conjunction with the Arduino module. Step 1. Watch the movie If you do not want to read the entire... [Read more]

DigiSpark is a miniature Arduino compatible module, based on the ATtiny85 microcontroller. The board is not equipped with a USB UART converter typical for Arduino. The USB lines have been connected with the pins of the microcontroller, while the USB support has been embedded in the... [Read more]

In today's article, I would like to present you a toy that is completely different than before. This time it is not a useful, more or less, gadget, but a seemingly ordinary toy. Seemingly, because it can give us something very valuable, but more on that later. Let's start... [Read more]

In the offer NavSpark Arduino compatible modules are available, based on a system that integrates a microcontroller and a GPS receiver. It is possible to order a free sample of NavSpark mini with the attached USB UART converter module NavSpark mini + USB adapter or a set of 6 NavSpark... [Read more]

Today I would like to introduce you to GPS signal receivers. I will try to do it on the basis of a ready-made module that uses a U-BLOX chip, namely a system called NEO-6 in the "M" version. I will not describe here how the receiver position measurement works. The NEO6-M module is... [Read more]

Raspberry Pi 3B vs Raspberry Pi 3B + minicomputer comparison. Article from Micros Everyone has probably heard about the Raspberry Pi. The popularity of this miniature computer exceeded all expectations. This SBC platform is constantly evolving. Recently, RPi2 and RPi3 have been the... [Read more]

In today's article I will test for you a Chinese, 9V reusable battery, charged via USB. I have described it once tricked charger with the function of charging the 6F22 battery, the popular "nine-volt" , actually without this feature. Several colleagues recommended the purchase... [Read more]

Today I will try to introduce you to the H bridges. The H-bridge is an electrical system that allows you to change the direction of a DC motor by reversing the polarity of the voltage at its output. Such a bridge can be made of e.g. relays, transistors or a ready-made integrated circuit... [Read more]

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]