Using Maxim DS1307 Real Time Clock with Atmel AVR Microcontroller

Building our own digital clock is one of the dreamed project by most of the hobbyist or anyone that want to learn or involve seriously in the embedded system world; the ability to integrate time, day and date to the embedded system is one of the important knowledge that should be known by any embedded system designer. Todays technology makes life easier as all these capabilities has already built nicely inside the Maxim (Dallas) DS1307 Real Time Clock (RTC) chip. For more information please visit http://www.ermicro.com/blog/?p=950

Category:

Science & Technology

Tags:

• ATMEGA168
• AVR
• WINAVR
• DS1307
• I2C
• LCD
• ADC
• PWM

[ermicroinfo]

Actually is nothing to do with the C code; because all the LM35X families will produce 10mv per centigrade degree, than for the LM35CX you have to find/calibrate what is the LM35CX voltage output or the ADC value for zero degree. Base on that value you could make the C code to put a minus sign (-) after the PM sign if the ADC value read bellow this threshold value.

[ermicroinfo]

Thank you.

[mondays89]

Great song, like the traditional hymns. :-) I was a little taken back when the video first started because it is so different than most music out there on youtube.

[mdvazeer]

There is one ready solution for Industrial Automation and Machine control - ATmegaPLC4 on YouTube

[mdvazeer]

There is one ready solution for Industrial Automation and Machine control - ATmegaPLC4 on YouTube

[puyansude]

Nice project, Bravo!

[milek021]

I see there is lm35DZ (Temperature range 0C to 110 C ) , what about temperatures under 0 C ( often in my country ) ? Yes, there is lm35cz ( -40C to 110C ) but does C code support reading "-" temperatures and is it showing those on 16x2 LCD ( As I see there is one empty "space" after PM ) ?!? Thanks.

[raoul4]

nice! i like the user friendly setup mode via terminal. 5*