serial

SIOS — the serial protocol syntax I made

When I first started making AVR modules, there was no Raspberry Pi or ESP8266. Arduino was introduced in 2005, the same year I started with the AVR microcontroller. But I didn’t know of it until many …

Getting started with the AVR microcontroller series

A quick introduction to the AVR microcontroller series with sample schematics of inputs, outputs, serial and some basic circuit drawing.

Temperature and auxiliary sensor (RS-485), AVR

Temperature sensor with serial RS-485 interface. Two additional sensors can be connected using 3-pin headers on the circuit board. Uses an AVR ATmega8 microcontroller.

Temperature and humidity sensor (RS-232), AVR

I rebuilt an existing interface module — to be a stand-alone temperature and humidity sensor, with serial RS-232 interface. Uses an AVR ATmega8 microcontroller.

Temperature and light sensor with signalling LEDs (RS-232), AVR

I rebuilt an existing interface module — to be a stand-alone temperature and light sensor, with serial RS-232 interface and some signal LEDs. Uses an AVR ATmega8 microcontroller.

Portable alarm system (school project, electronics)

Portal alarm box unit, my main project on technical college.

Serial interface module, with analog and digital I/O — AVR

Serial (RS-232) interface module; providing 6 analog and 2 digital inputs, and 9 digital outputs. Uses an AVR ATmega8 microcontroller.

Serial port I/O module with 15 inputs — AVR

Serial (RS-232) interface module; providing 15 digital inputs. Uses an AVR ATmega8 microcontroller.

Serial interface for emergency power off — AVR

RS-232 interface module, with voltage measurement. Used to communicate with the emergency power off unit in the Rack box project. Installed inside Rack box status panel. Uses an AVR ATmega8 …

Temperature and light sensor, with LEDs — AVR serial module

Light intensity and temperature sensors; with white, green, yellow, red and blue signal LEDs and a buzzer. RS-232 communication. Uses an AVR ATmega8 microcontroller.

Serial port I/O module with 9 in and outputs — AVR

RS-232 interface module, with 9 inputs and 9 outputs. Uses an AVR ATmega8 microcontroller.

Home power consumption measuring unit, with AVR

Measures the power consumption by counting LED pulses from the home fuse box. Measurements can be read via a serial interface, uses the AVR ATtiny2313 microcontroller.

Serial port I/O module with 11 inputs — AVR

RS-232 input module, with 11 inputs. Rebuild of previous RS-485 module. Uses an AVR ATtiny2313 microcontroller.