Articles

Hello I present my headphone amplifier, which, according to the author of the project, is to operate in class A. The amplifier consists of three blocks: 1. Symmetrical power supply. 2. Headphone protection / Headphone switch-on delay. 3. Stereo power stage. The power supply is built... [Read more]

Hello. Recently, I got my hands on two dial indicators. I used two such systems to drive these indicators based on the LM358 integrated circuit. I made the pcb project in TraxMaker. The whole thing is placed in a plastic housing. Film_presentation: [Read more]

Hello my dears. . I will test and take apart here the qTouch WiFi/RF433 light switch, which is distinguished from other products of this type by the fact that it only plugs into the L wire, meaning that it will work even if we don't have an N led to the box. I will test this switch... [Read more]

This mini-project is related to the previous one: This time I took a Maxim MAX16832 (V MAX = 65V) supplying the diode with a constant current up to 1000 mA. This chip is manufactured in a hobbyist-friendly SOIC-08 housing with an added thermal pad underneath, which allows it to better... [Read more]

Hello, This experimental project shows how to use ATtiny13 to sync live music and lights with just a few extra components. The design uses a single ADC (analog-to-digital converter) channel for signal acquisition and some DSP (digital signal processing) calculations that separate... [Read more]

Hello, here I will present the Aqara temperature / pressure / humidity sensor model WSDCGQ11LM. I will pair it with Home Assistant via Zigbee2MQTT, show its operation, interior and sample graphs of data collected with it over a few days at the end of winter. Aqara temperature / pressure... [Read more]

Some time ago I made a bicycle lamp powered by a bicycle hub dynamo. As such a dynamo in an unloaded state can generate definitely high voltages (up to 100V according to a German source), I was looking for a converter that can withstand high voltages. The choice fell on the chip from... [Read more]

Here I am going to present my Home Assistant compatible network relay driver, based on Tasmota HTTP protocol. The controller is using the PIC18F67J60 8-bit MCU with integrated RJ45 cable networking and features relays control, temperature reading, alarm clock, buttons, independent... [Read more]

Good morning I wanted to present my next watch project. I have been building watches for years and recently I realized that most of the pieces somehow fell apart and I have the last one left. This motivated me to try to rebuild my collection, hence this project. I called him Open... [Read more]

Today I present a CNC machine - a plotter with a drag knife which I made for my own use (for my spouse). The spouse designs and cuts out decorations from paper. So far, he uses the Brother Scanncut plotter. The machine works quite well, although after cutting, I think that already... [Read more]

Hello colleagues. Using the TV in a dark room sometimes causes eye fatigue due to the brightness of the screen. This is no discovery - you can turn on the lamp and you're done. You can also turn on the LED strip on the back of the TV and turn it off when you are finished watching.... [Read more]

Hello I would like to present my stereo tube amplifier, built on two PCL82 tubes. It is a very budget amplifier, the cost of production did not exceed around PLN 150. Let's start from the beginning. August 2020, Dominican fair in Gdańsk, while digging through the piles of antiques,... [Read more]

At the beginning, I would like to thank everyone who did not believe in me - my strength in you! :D Table of Contents: 1. Introduction 2. Assumptions 3. Mechanics of movement 4. Why not CoreXY? 5. The final shape of the "cross" 6. Toolchange - a system of variable tools 7. Parking... [Read more]

The title picture is probably a bit familiar from my previous topic about pictograms. Today the device is ready. Generally available weather stations have one thing in common - the LCD display. It has its advantages and disadvantages. When it comes to the readability of these panels,... [Read more]

I have been using the Chinese DDS generator module for some time, I got tired of the makeshift of this device, the lack of a housing, a spider power supply from some li-ion batteries and converters, so I decided to sort it out inspired by previous publications on the electrode. Having... [Read more]

Hello my dear Here I will describe in detail how you can easily start your adventure with Home Assistant. I will present its configuration on various platforms (Raspberry Pi, Banana Pi, virtual machine) and demonstrate how to connect the first devices to it via WiFi and Zigbee. Introduction... [Read more]

It was already 8051, now it's time for the Z80. The computer consists of several modules. The motherboard contains a Z80 processor, 512kB RAM and 512kB flash memory, IO 8255 chip and the Atmel ATF1502AS 5V CPLD that connects it all, which also works as a memory bank switch. The... [Read more]

Today, a simple design - a 'desktop' server with the capacity to accommodate 8 drives. Everyone wants a file server that is small, cheap, capacious, expandable and powerful. As it is in life, it is difficult to combine all these features.... But let's try an intermediate proposal... [Read more]

Hello my dears Here I will present in detail how to configure and inside the battery-powered WiFi door/window sensor compatible with the SmartLife smart home control application. I will also show here how you can configure its work scenarios, e.g. automatically turn on the light bulb... [Read more]

Hello, inspired by the designs presented on the forum, I decided to build my own amplifier, the project is strongly based on Mosfet 2x50W amplifier with atTiny driver and remote control the heart of which is a power amplifier copy of the Rotel RA-820. The diagram of the whole is not... [Read more]

. Hello my dears . Here I will detail the process of uploading new firmware via WiFi (using tuya-convert) to a Smart Life smart light switch based on a module with ESP8266 (TYWE3S). This is a very convenient way to upload e.g. Tasmota to various smart devices, without having to open... [Read more]

I warmly welcome Due to the fact that from time to time the topic of inspection microscopes in the "Do It Yourself" category appears here, I decided to present my solution for this device. The design is not extraordinary and innovative, it is based on an industrial camera that I recovered... [Read more]

Dear forumers, Like probably most of you, I've been struggling for years with the problem of a large number of electronic, mechanical and other small "appendages", often in individual pieces jumbled up somewhere under the OTHER label. The drawer organisers I have don't quite work,... [Read more]

There are many designs for a device that is one of the elements of the workshop equipment and it takes a while to find a diagram or description of the construction. When creating the design that I want to devote to this description, I was guided by the need to separate high power... [Read more]

Hello, This is another modification of the transformer for the welder to a more professional one. Strong power in amperes, and handles (handles) with wires of welding electrodes. Finally, the welding machine is ready for a colleague and the next one is built. [Read more]

. Hello my dears . In this topic I will look at the inside of a WiFi controlled relay called the BW-SS1, the equivalent of the Sonoff made by Blitzwolf. I'll see how it's built inside, if and by how much it differs from the more well-known Sonoff, and I'll check if it can be easily... [Read more]

Last year I bought a parkside plka 4A1 cordless soldering iron in lidl. The device is quite handy, although only thin wires could be soldered. After a few uses, the tip stopped heating up, unfortunately it is pressed with the E10 shaft. The wire inside is damaged because after time... [Read more]

In this topic, I will first show you the inside of the printer in detail HP Deskjet D1360 , and then I will show you how to use its parts with Arduino. I will specify the pinout of the encoder from the inside, write the code to determine the position of the carriage using the encoder,... [Read more]

Hello my dears I will show here how you can easily assemble your own IoT WiFi controller from ready-made modules (ESP8266, power supply, relay). In the example version, it will allow us to turn on/off one device via the Internet. It will be like a Sonoff DIY version, with a detailed... [Read more]

Hello my dears To celebrate the upcoming holidays, I would now like to present a slightly looser project. This will be a 3D printed lantern based on a 3D model available under a CC licence and my various improvements. Used 3D model The design is based on the 'asian lantern' model... [Read more]