Articles

. Hello, after a Chinese timer failed (flooded with water), I decided to construct my own two-channel one. The programmer is to operate the circulation pump and the lighting in front of the building. I opted for solid-state relays because of their 'eternity' and silent operation.... [Read more]

. In this topic I will build from scratch a simple LED dimmer controlled by two buttons. The project will be based on a PIC12F683, which I will program here without using external libraries - GPIO and PWM will be configured according to the information from the datasheet. For this... [Read more]

It's time for another mini project in the series of practical 3D printing - I invite you to report on the design of the replacement for the lamp mounting element in Blender, all step by step, along with a demonstration of the final result. The original element was metal but after... [Read more]

. Today we learn about the design of the dimmer with Polish software. According to the manufacturer, the DIW-01 offers control via a monostable button (full), bistable (on/off only) and via the Supla app/website. Of course, it can also be used in Supla scenarios/automations, but that's... [Read more]

. Today we are going to look at a single-speed, no-impact drill from a bygone era. This is another old piece of equipment that I will try to run here. I have identified the model of the equipment as a Celma PRCb, although the nameplate is partially worn out: . The first thing I started... [Read more]

. How do we send a notification to a user from our ESP-based device? One way might be to use email. This is completely free and often much simpler than, for example, sending an SMS message. Here I will show how to easily send a message based on the SMTP service. I will use a ready-made... [Read more]

. Here I present the WS-03H1 elHome module kit together with the WAC-02H1 temperature/humidity sensor, a repainted Sonoff TH10/16 kit with AM2301 sensor. I will change its firmware so that it can be controlled locally. The kit can be bought together for PLN100, or the base and sensor... [Read more]

. Today we are learning the basics of LVGL, which is a "lightweight and versatile graphics library for embedded". To make things easier for us, in this topic I'll use its ready-made integration with the ESP32-2432S028R board and create the interface elements themselves in SquareLine... [Read more]

There are YAGI Wi-Fi PCB antennas available on Aliexpress for the 2.4GHz band. However, I didn't need such an antenna for a typical Wi-Fi card. I'm using ESP32 modules with omni-directional antennas, which transmit information between two buildings about 300m apart after ESP-NOW.... [Read more]

RCWL-0516 is a microwave motion detector available on Aliexpress for around PLN5. Unlike PIR detectors, the sensor responds to movement behind wooden furniture and other obstacles that attenuate microwaves poorly. The system uses the Doppler effect to track changes in the frequency... [Read more]

Over-production water heating for PV users under new billing rules. I would like to present a low-cost project that can be done by anyone who likes electronics and happens to hold a soldering iron in their hand. The project is designed to switch on the heater when our photovoltaic... [Read more]

Hello :) . I have been planning for quite a long time to build a device to indicate the current electricity consumption in the house. The problem was that there was no way to connect to the power supply in the meter box. Pulling additional cables meant devastating part of the building.... [Read more]

. Google Sheets offer a wide range of features, here I will focus on one of them - the GOOGLETRANSLATE function. This function allows us to automatically translate words and phrases between two languages, just like regular Google Translate, but its presence in the sheet can really... [Read more]

Hello. It's me again with another device. This is the Avatto DMS16-W1 1-channel dimmer smart switch with CBU talking to a Puya PY32F002A (TSSOP-20) MCU. The Puya MCU is well documented and has had some interesting followings on Elektroda ### PY32F002A Microcontroller Summary The PY32F002A... [Read more]

. Today we will make a simple weather display based on the ESP32. The weather will be retrieved from the internet by using one of the many free weather API type services. The project will not use any DHT11 or BMP280 type sensors, all information will be retrieved from the web via... [Read more]

While shopping on AliExpress, I noticed that a certain shop also has ATmega88PA-PU microcontrollers in DIP28 cases, so I ordered 2 pieces (price under 6 zł. per piece). After 8 days of dispatch, the package arrived. The writing on the microcontrollers looked quite good, but the signature... [Read more]

PCBWay, a leading global provider of PCB prototyping and manufacturing services, is proud to announce its 10th anniversary. Over the past decade, PCBWay has grown from a small start-up into a renowned industry leader, known for its commitment to quality, innovation, and customer satisfaction.... [Read more]

. Today I am presenting a firmware change and connection to Home Assistant for another product in the Avatto series. This time it will be a triple light switch based on CB3S. The situation here will be similar to the white single model - I will need to detect the GPIO configuration... [Read more]

Automatic Tuya JSON extraction allows you to automatically configure the GPIO template of your smart device. Unlike in Tasmota, where all GPIO probing has to be done manually, OpenBeken flasher BK7231GUIFlashTool is able to extract the Tuya GPIO roles, so it can automatically tell... [Read more]

. Some time ago I ordered some radio modules with the SX1276 chip for experimentation. After some time, I finally decided to get around to testing them. In order to make a sensible estimate of the range and capabilities of these modules, I built several devices: two serving as receivers/transmitters... [Read more]

. Today we are checking out another extension strip, this time with five coloured sockets with separate switches. In addition, the strip has one main collective switch. The strip is advertised as having an "anti-surge system" and a "protection system for USB-charged devices" so it's... [Read more]

. Today we're tackling another piece of equipment from the electro junk. This time it's going to be a Brother printer, which strangely enough seems to be showing fairly full inks. In its current state it doesn't even take paper, but maybe there's something to fight for? Let's find... [Read more]

I'm hoping this post, and the script herein, will be useful to anyone unsure about posting BL602, LN882H, BK7231N, BK7231T etc factory firmware backup/dump binary files anywhere public, eg these forums on Elektroda. Factory firmware backups can be used to restore devices to their... [Read more]

. Today we continue our adventure with the ESP32 module + touchscreen display version of the ESP32-2432S028R. In this section we will practice interacting with the display using the touchscreen. To do this, we will write some simple interactive programs here, such as measuring the... [Read more]

. Here I will describe the implementation process of sending an IR signal based on a PWM and a timer. The signal sent like this from the microcontroller will be able to control the air conditioning. In addition, the signal format used will be compatible with what Flipper Zero captures,... [Read more]

Hello to all! I recently bought this one for my collection, got it very cheap on sale, but the normal price is also good Link : I found it interesting, compared to the other two similar devices I've been playing with ( TOMPD63-WIFI and TOMPD63-LW because of the graphic screen. OTOH,... [Read more]

The project I present below shows LED lighting ( but can also be classic ) switched on by a PIR sensor. In my case, the inspiration was the notorious spilling of a sweet drink when I reached for it at night. You're sleepy, it's a dark night, you want a drink, but it's hard to hit... [Read more]

OpenBeken has been recently ported to LN882H platform, and I have received few such WiFi modules from our readers, so it was a good time to think about some kind of "dev board" for this new Lighting Semi platform. The modules I received were unfortunatelly not in TYWE3S/ESP12 format,... [Read more]

. Today we are going to try to capture an IR (infrared) signal using Flipper Zero, analyse it both in Flipper .raw format and on oscilloscope and then consider what is needed to send such a signal from within our microcontroller. Flipper Zero allows you to conveniently capture, store... [Read more]

. Today I have another package on the table from a reader in Germany. This time it's an unusual smart socket, seemingly just another version of the popular LSPA9, but here distinguished by an unusual WiFi module from the BK7231M. The BK7231M is essentially the BK7231N but with different... [Read more]