ATtiny13 – running dots & digits on 7-segment LED tube display

This article shows how to make an example project of “running dots & digits” using ATtiny13 and popular 7-segment LED tube display based on MAX7219/MAX7221. Complete code is on GitHub. MAX7219/MAX7221 library for LED tube display A lightweight library for 7-segments LED tube displays based on MAX7219/MAX7221 chip that works with tinyAVR family (ATtiny13, ATtiny25, ATtiny45, … Read more

ESP8266 – building the toolchain for Linux (Ubuntu)

This is a quick tutorial that shows how to build a complete development environment (including FreeRTOS support) for the ESP8266 processors on Linux. These instructions have been tested successfully on Ubuntu 17.04. Building Toolchain Step-by-Step All these steps are based on “Quick Start” from  ESP-OPEN-RTOS. 1. Collect and install tools sudo apt-get install git make … Read more

ATtiny13 – random flickering pixels on 8×8 matrix LED display

This example project shows how to make random flickering pixels using ATtiny13 and popular 8×8 matrix LED display based on MAX7219/MAX7221. Complete project code is on GitHub. MAX7219/MAX7221 library for 8×8 matrix LED display A lightweight library for 8×8 matrix LED displays based on MAX7219/MAX7221 chip that works with tinyAVR family (ATtiny13, ATtiny25, ATtiny45, ATtiny85) can … Read more

ATtiny13 – temperature logger using LM35 and Software UART

This project is about a simple temperature logging system using ATtiny13 and the Software UART. The system reads the temperature every second and shows it on the serial console (baudrate 19200, settings 8N1). The temperature is shown in °Celsius. LM35 has been used as the temperature sensor. Complete example code is on GitHub. LM35 Temperature Sensor … Read more

ATtiny13 – TM1637 Library

This article is about tinyAVR (ATtiny13, ATtiny25, ATtiny45, ATtiny85) library for 7-segment display modules based on TM1637 chip. These TM1637 modules provide two signal connections (CLK and DIO) and two power connections (VCC and GND). Signal pins can be connected to any pair of digital pins of the AVR chip. Signal pins configuration is defined … Read more

How to compile and burn the code to STM32 chip on Linux (Ubuntu)

This is tutorial for beginners that shows how to install tools, compile the code with gcc-arm-none-eabi and send it to the STM32 using st-flash. It also introduce basics of automation of this task by putting all instructions into Makefile. A few, complete code examples can be found on GitHub: stm32f401 stm32f072 stm32f042 1. Installing compiler … Read more

ESP32 – WiFi sniffer

This experimental project shows how to build a simple and inexpensive WiFi packet analyzer (also known as a WiFi sniffer). The heart of this project is WiFi module of ESP32 which is able to work in a promiscusous mode. It means that this clever chip allows IEEE802.11 network packets capturing for further analyzing. Because WiFi … Read more

ESP32 – blinky with delay function

This blinky project shows how to interface LED to the ESP32 and write a simple program to make the LED blink. The full code is on Github, click here. Parts List ESP-WROOM-32 module USB<->TTL converter (3.3.V) Efficient power supply (3.3V) R1 – resistor 560Ω, see LED Resistor Calculator LED1 – basic LED Circuit Diagram Firmware … Read more