AVR is a series of microcontrollers from Atmel. Fitted with A/D converters, comparators, timers, interrupts, internal oscillator, and more. Flash memory is used for the main program, SDRAM for variables and EEPROM for values that need to be saved through a power loss. Cheap, fast and easy make them perfect for home automation projects.
Temperature and auxiliary sensor (RS-485), AVR
![Temperature and auxiliary sensor (RS-485), AVR](https://blog.cavelab.dev/2012/03/avr-temp-auxiliary-serial-sensor/cover_hu8c37e3337b82f6b2df0089dcebcf300b_389660_860x0_resize_q80_lanczos.jpg)
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
![Temperature and humidity sensor (RS-232), AVR](https://blog.cavelab.dev/2011/12/avr-temp-humidity-serial-sensor/cover_hubb86f9892bd2a6646e52eefed03c269e_574923_860x0_resize_q80_lanczos.jpg)
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
![Temperature and light sensor with signalling LEDs (RS-232), AVR](https://blog.cavelab.dev/2011/11/avr-temp-light-serial-sensor-with-leds/cover_hu066928f624943fbf9cb9dc6017f5a8ae_576376_860x0_resize_q80_lanczos.jpg)
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.
Car warning lights, with AVR controller
![Car warning lights, with AVR controller](https://blog.cavelab.dev/2009/06/avr-car-warning-lights/cover_hud350cf2a9dd7ea6f45e84f0e88da80d9_168736_860x0_resize_q80_lanczos.jpg)
Strobe light controller, using the AVR ATtiny2313 microcontroller. Meant for cars; with front, side and rear warning lights.