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At one time, and it will be thirty years with a cover, I glued together a resistor container from matchboxes. Since my wife promised to buy me a 3D printer, I sculpted such an organiser as part of my design education. I attach the files. If anyone wants to comment along the lines... [Read more]
The Arduino Mega (ATmega2560) + ESP8266 module on one board contains Arduino Mega and a WiFi module based on ESP8266 with a printed antenna and an external uFL antenna connector. The cost of the module on auction portals is ~ $ 12 Link . The module can be powered from a micro USB... [Read more]
Introduction Tutorials that help in developing software for microcontrollers focus mainly on the use of peripherals of the microcontroller itself, which is understandable, but unfortunately they rarely focus on the part of the program that executes before the main function. The following... [Read more]
Today I will present you a very interesting microscope equipped with its own LCD screen (because it does not look like OLED or even IPS). I got the device for testing from one of our forum colleagues - @Bestler Thank you very much, and sorry for "messing" ... But to the point. The... [Read more]
The laser SDS011 sensor from Nova Fitness is available on auction portals for ~ $ 20 SDS011 . The device has an air inlet and an air suction turbine. 5V power supply, UART communication interface works with 3.3V voltage level. Information about PM2.5 and PM10 dust measurements is... [Read more]
Arduino UNO + ESP8266 module on one board contains UNO based on ATmega328 and WiFi module based on ESP8266. The cost of the module on auction portals is ~ $ 7 Link . The module can be powered from a micro USB socket or DC 7-12V connector. Communication with the modules takes place... [Read more]
Piri made it available to us for testing remote controlled socket WiFi 2.4GHz to measure the power consumed by the connected device. In the video you will find the results of the socket tests, we will also take a look inside the housing. The control of switching on the connected device... [Read more]
Today I would like to present a brief comparison of the two NEO-6M GPS modules. The difference between these modules is the use of a different PCB and a different antenna. The described modules in the pictures below. Older version on the left, newer on the right. I described the first... [Read more]
Piri made it available to us for testing 2.4GHz wireless WiFi camera reolink argus 2 . The term "wireless" is of key importance here, because the camera, apart from WiFi connectivity, is powered by a battery (5200mAh 3.6V) and can draw energy from a photovoltaic panel. In the video... [Read more]
Today I want to present an interesting (in my opinion) artificial load working in CC mode, in which a test of fast charging modes can be forced from the menu. What is useful for testing chargers and powerbanks with this option. The heart of the device is the MOSFET IRFZ44N. Looking... [Read more]
Hello! During the renovation of the living room, I came up with the idea to hide the projector and screen for the projector in the suspended ceiling (or more precisely in the decorative band under the LED lighting). One button activating the projector was supposed to turn a seemingly... [Read more]
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]
![Photo booth for the party [Canon camera + Arduino]](https://obrazki.elektroda.pl/6452918600_1534333803_thumb.jpg "Photo booth for the party [Canon camera + Arduino]")
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]
