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Raspberry pico W GUI (-O)
The Raspberry Pi Pico W is a microcontroller board that is based on the Raspberry Pi Pico, but with the addition of wireless connectivity features. Specifically, the Pico W includes built-in Wi-Fi and...
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Outdoor UV index sensor
Here are instructions for outdoor UV index and ambient light sensor. Assembled UV index and ambient light sensor BoM The construction is shown in the drawing: UV index and illumination sensor...
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Multisensor LoRa Device
The described device is nearly matchbox-sized board (50 x 24 mm) packed with sensors. Auxilary board is 10x50mm with additional sensors. The module is developed around the Murata ABZ LoRa module, which...
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From c source to cloud with ESP8266
There are many steps from c source code to cloud data storage. Let’s start… “To get the end, you must go back to the start” – Grandmother Yelsh In this contribution I will describe how I started using...
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Raspberry Pi breakout board with ESD, PoE and Cortex M0
This is Raspberry Pi GPIO connector breakout board with some additional features: “Real” or “passive” PoE with 12V output 5V DC/DC module Additional 3,3V regulator ESD protection on all GPIO pins two...
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Simple Rh, T and p sensor with UART communication
The Pressure, temperature and humidity sensor based on MS5637 HDC1080 originally (Rev. 2) operates via RS485 interface and multidrop HDLC-like protocol. I decided to simplify this for use with...
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Pressure, temperature and humidity sensor based on MS5637 HDC1080 Rev.2
Gal ordered some PCBs from PCB-Way a while ago. It was multiproject panel with several PCBs. One of the modules was double sided revision of the Pressure, temperature and humidity sensor based on...
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Quadruple BDC driver for robotics
Once finished (deadline is end of January) this project will become open-source software and hardware. My quadruple BDC driver for supports up to 4 brushed motors with encoders. Each motor is...
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LED decoration
This LED decoration is for beginners in microcontroller applications. It has 8 LEDs, audio generator and possibility to interconnect with other modules. The PCB is simplified to certain level in order...
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APA102C LED strip at 28 MHz clock
I recently received 1m of APA102C led strip with 144 leds per meter. I want to use the strip for rotary POV display so I cut the strip in half and tested the performance with a STM32L476RGT nucleo...
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Affordable pH meter
Our home vineyard delivers about 1000 liters of wine every year. It takes some effort to keep good quality and pleasure for all friends tasting the must, new wine and “senior” wine reserves. One of the...
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USB/RS485 converter on a double sided PCB
USB/RS485 module on a single sided board worked successfully for several months. The code is now stable and I decided to order small batch of double sided PCBs for this project. Here is documentation:...
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LED shades
Unfinished content – work in progress. Light Emitting Dance shades – general purpose party accessory. About this project I believe many young adults like to party and with the rapidly growing EDM...
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UV index sensor with RS485 interface
This is another sensor in weather-sensor series. It is based on silabs Si1133. Schematic: Si1133 Sensor schematic with RS485 interface The PCB: uvindex sensor — PDF template for tonertransfer...
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Source code generator for Command Line Interpreter (CLI)
Microcontroller with serial bus or USB CDC (virtual COM port) is usually connected to some terminal. User then type commands and firmware in the microcontroller interprets entered commands. Developing...
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Pressure, temperature and humidity sensor based on MS5637 HDC1080
This is anothe small module to measure air pressure, temperature and humidity. Two sensors are on-board: MS5637 and HDC1080. Microcontroller is small cortex M0 in TSSOP-20 housing from STM:...
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Keyboard for a CNC – recycling a programmable keyboard
Final look This keyboard is more than 10 years old. I got it for free but it had its problems. First one was a PS/2 interface. Not ideal for a keyboard used in 2016. Second problem was software for...
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HDLC-Like data link via RS485
Communication between microcontrollers is always interesting topic. I was looking for simple, efficient and reliable protocol between several microcontrollers. First I have to choose the physical...
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USB to RS485
Testing of sensors with RS485 using PC without proper interface is not possible. Since RS232 interfaces are very rare, the interface should be hooked to USB. The interface between USB and RS485 can be...
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