Articles

:smile: Over 10 years ago Gerhard Schmidt DG4FAC on avr asm tutorial.net (site already not exists) :cry: presented such a circuit :idea: LED effect based on ATtiny13 ; ; *********************************** ; * Ledlight with an ATtiny13 * ; * (C)2012 by avr-asm-tutorial.net... [Read more]

I invite you to another analysis of an older terrestrial TV receiver. In this topic I'll show its interior, view its board with a thermal camera, download the contents of its Flash memory and try to decode the partitions there myself in my own C++ program. At the end I will present... [Read more]

I would like to invite you to a presentation of a compact thermal imaging camera with a resolution of 256×192 and a frame rate of 25 Hz, with a measurement range of -20°C to +600°C. The device works directly with a phone and requires no external power supply. The low power consumption... [Read more]

This time a description of the GNCC GC2 camera. The camera version on the ak3918ev300 chip is not supported by either Thingino or OpenIPC. In order to run RTSP streaming, I had to use the manufacturer's SDK and write my own software. While there is an example with RTSP, it does not... [Read more]

The OP-WF-A3 is a three-channel RGB LED colour strip controller offering control in two ways - via Wi-Fi from the Tuya app, or via the included remote control. Here I'll show the inside of it, then I'll change its software so that it can be programmed a bit like an Arduino, and finally... [Read more]

NextPCB launches free PCBA support program for RP2040 projects NextPCB announces a new round of its support program focused on the Raspberry Pi microcontroller RP2040 edc5bc8dc RP2040, offering two fully assembled PCBA prototypes free of charge for projects based on RP2040. Sponsorship... [Read more]

I invite you to a presentation of images generated by two models - the Nano Banana and the Nano Banana Pro. Here I will try to generate diagrams, infographics and various unusual images - it will be really interesting. It's not those days anymore when AI couldn't apply text to an... [Read more]

Recently I reactivated the project of a network synchronised clock based on the MAX7219 display and additional sensors, but the work was effectively slowed down by the lack of free space on the table and the long time waiting for compilation and uploading firmware to the board. For... [Read more]

Renovation of vintage Rochar A.1335 digital voltmeter Good afternoon, some time ago I received a vintage voltmeter handmade in the early 1960s from a friend in France. I have restored this instrument, I invite you to report on the repair of this vintage device. Perhaps a few words... [Read more]

How do the brushes look after 10 years of use? Today I will present a simple washing machine repair, a process that anyone can do at home. The patient is a Samsung Diamond WF8502NMW, which occasionally shows code 3E and usually just doesn't start at all. When the spinning alone is... [Read more]

Hi, under this unusual topic name I present a project of a small automatic music player to make sitting on the toilet more pleasant. Of course this is one application, in other situations it could probably be useful too ;) The main considerations were low complexity, a trivial interface,... [Read more]

Here I will present a tool that allows you to "rotate" a given photo, or more precisely to generate a perspective view inverted by a given angle or a top or bottom view. The full name of the model tested is dx8152/Qwen-Edit-2509-Multiple-angles and it is available to run and download... [Read more]

It has been a long time since I presented a device realised on the BL602. It is time to change that. The BL602 is a microcontroller offering 2.4 GHz Wi-Fi and Bluetooth LE 5.0 connectivity based on a 32-bit RISC-V core clocked at up to 192 MHz. It also has on-board Flash memory, generally... [Read more]

Extender with six USB sockets, that means charging phones for the whole family - isn't that convenient? Plus, the whole thing for just PLN35! Is there a catch here? Let's find out. In this topic, I will present two products from the same series - SmartLED 8152 (5 x USB, 5 x 230V)... [Read more]

Hello forum members. I would like to present a chassis design I have made for the Raspberry Pi 4 that works with the IQaudIO DAC Pro card. The device serves as a music streamer from a home NAS server and can play audio material in 16-24 bit quality. I used the Volumio system as the... [Read more]

Here's a dinky little thing. A cousin of the 1 and 3 port USB-A type. A Shenzhen Koston Technology Co Ltd (aka SZKOSTON) device. A type-C + type-A wifi smart USB switch. 1 button to toggle both USB ports on/off and one red LED that flashes when wifi is connecting or in pairing mode... [Read more]

I would like to share an interesting observation after PCB assembly. I was testing a device today whose PCB assembly of components I had commissioned 8 months ago. Lead assembly. The device failed the test due to unusual malfunctions. My initial thought was a faulty PCB, probably... [Read more]

Here's something I've needed for a long time - a dual USB to UART converter, i.e. one USB connector and two serial ports on the output, and this together with the DTR/RTS flow control signals brought out, which can be used, for example, to reset and control the bootloader mode of... [Read more]

Today's test will focus entirely on powerbanks supporting the Quick Charge standard, i.e. capable of powering our mobile devices with a voltage higher than the standard 5 volts. This speeds up their charging significantly. The declared power of each unit is 22.5 watts and the capacities... [Read more]

WBR3 is a distinctive Wi-Fi module based on the W701-VA2-CG (RTL8720CF) chip. The WBR3 is distinguished by the fact that the necessary signals for its programming are located only on its underside, making it necessary to solder the module off the board for firmware changes. Additionally,... [Read more]

There are an increasing number of backplane relay modules on the market based on the T34 chip. The T34 is an integrated Wi-Fi chip that is a smaller version of the popular CB2S/CB3S/itd based on the BK7231N core. Although it is still the same chip from the software side, changing... [Read more]

Power Smart Control: Delivering Innovative Solutions for Power Electronics Madrid, Spain – [28.10.2025] – Power Smart Control (PSC) is empowering innovation in power electronics through cutting-edge design software, rapid prototyping hardware, and engineering services. Founded in... [Read more]

Ever wondered how it works and how a battery-powered doorbell with a camera is built, in addition to interacting with a mobile app via Wi-Fi? Here, I will try to demonstrate this. I will also see if it is possible to program the microcontroller from inside. The kit comes with a battery-powered... [Read more]

I'd like to invite you to a demonstration of the interior, construction and software change of yet another device offering remote control via Wi-Fi with a split between four 230 V sockets, a 5 V line (four USB ports together) and energy metering. The strip shown here is based on the... [Read more]

Here I will show how to easily establish a connection to an MQTT broker from a web browser. I will use an off-the-shelf MQTT library that connects to the broker via a WebSocket mechanism and demonstrate how it can be used to receive and send data via Mosquitto installed together with... [Read more]

Warsaw Industry Week 2025 – The Largest Industrial Fair in CEE Discover the future of industry at Warsaw Industry Week 2025 – the largest industrial technology fair in Central and Eastern Europe. From November 4–6, 2025, Ptak Warsaw Expo will host the ninth edition of Warsaw Industry... [Read more]

I had previously bought a set of these around 2020 because they contained an ESP-12F with Tasmota support. later I bought some more, but they changed the chip used in them. Thankfully I've found people have been making a similar firmware for this board as well. There's no guide for... [Read more]

The subject of the TH08 sensor, based on the CHT8310 chip and offering Wi-Fi connectivity, has already been raised many times in our forum. Its integration with the Home Assistant proved possible, albeit quite challenging. This time I will show its Zigbee variant, whose pairing with... [Read more]

. The Svensson SMART06B is a remote-controlled electric kettle compatible with the Tuya app. It offers control over temperature and heating time. Here I will show how its firmware can be changed to make it compatible with Home Assistant. This will also result in it being cut off from... [Read more]

In recent days, an interesting story of a certain repair has played out on the channel of the US-based service NorthridgeFix, which is based in Los Angeles. Its author, Alex, regularly posts videos in which he demonstrates live the process of diagnosing and repairing damaged electronics.... [Read more]