AVR Digital Clock with Roman Numerals

This digital clock project will display a Roman number instead Hindu-Arabic numeral system (1,2,3... ). The project uses micro ATTINY2313 as main processor and LCD to display the clock. When you turn on the device, it will shows a screen flashes "Tempera tempus" as reminder to adjust the time.


The adjustment is done via the small button.

• Press and hold the button for about 3 seconds -> hours appear on the screen -> release the button.
• Press the button again and hold -> the hours advance from "I" to "XXIV" -> release the button on the time right.
• Wait about 3 seconds -> minutes to appear on the screen.
• Press the button and hold -> the minutes advance from "nothing" to "LIX" -> release on just minutes.

Unfortunately, you have to readjust the time after your turn off the power, because there is no RTC in this  project.

Download schematic and source code here

AVR Digital Clock with Roman Numerals

This digital clock project will display a Roman number instead Hindu-Arabic numeral system (1,2,3... ). The project uses micro ATTINY2313 as main processor and LCD to display the clock. When you turn on the device, it will shows a screen flashes "Tempera tempus" as reminder to adjust the time.


The adjustment is done via the small button.

• Press and hold the button for about 3 seconds -> hours appear on the screen -> release the button.
• Press the button again and hold -> the hours advance from "I" to "XXIV" -> release the button on the time right.
• Wait about 3 seconds -> minutes to appear on the screen.
• Press the button and hold -> the minutes advance from "nothing" to "LIX" -> release on just minutes.

Unfortunately, you have to readjust the time after your turn off the power, because there is no RTC in this  project.

Download schematic and source code here

AVR Rotating Led Display

If you like Rotating LED Display project, check out Rotating Led Display project by Aki Korhonen. He made POV project using modified 8 cm fan and microcontroller AVR AT mega as main part. To control the led, the project use 74HC595D shift registers. Not only can display the text this Rotating Led display can also demonstrate drawing and playable Pong game. Check the video below,





tag: POV led display, rotating display, LED animation, AVR project (src)

AVR Rotating Led Display

If you like Rotating LED Display project, check out Rotating Led Display project by Aki Korhonen. He made POV project using modified 8 cm fan and microcontroller AVR AT mega as main part. To control the led, the project use 74HC595D shift registers. Not only can display the text this Rotating Led display can also demonstrate drawing and playable Pong game. Check the video below,





tag: POV led display, rotating display, LED animation, AVR project (src)

Digital Clock using Classic LED 7 Segment Displays

This is a simple digital clock project using PIC16F887 and classic LED 7-Segment from HP 5082-7414 created by punkky. The displays are bright red and sun light viewable. Each clock consumes about 0.25W (50mA, 5V) when the PIC16F887 operates at 250kHz (display refresh rate is about 61Hz).

Tag: digital clock, 7 segment display, PIC project src

Digital Clock using Classic LED 7 Segment Displays

This is a simple digital clock project using PIC16F887 and classic LED 7-Segment from HP 5082-7414 created by punkky. The displays are bright red and sun light viewable. Each clock consumes about 0.25W (50mA, 5V) when the PIC16F887 operates at 250kHz (display refresh rate is about 61Hz).

Tag: digital clock, 7 segment display, PIC project src