Enter the AVR Clock.
Main Parts -
1) Arduino Deumilanove
2) DS1307 Real Time Clock (RTC)
3) 16x2 LCD Screen
Arduino is a low-cost AVR powered platform having a huge online support group & is quite popular amongst hobbyist, artists & educationists. The Arduino community has even created a programming language that reduces the learning curve for people who have no background in coding. I however decided not to use the IDE since I already knew how to program the AVR using avr-gcc based tools.
DS1307 is low power consuming, battery backed chip that can be programmed to hold time & date for a really long time. According to the datasheet, a 3.3v Lithium Ion cell will last for approximately 9 years !!! Plus it communicates to the controller over I2C protocol, further reducing wiring footprints. Sparkfun offers another chip, DS3231, which has an inbuilt temperature sensor & works on 3.3v instead of 5v. I would recommend the DS3231 in case you plan to buy a RTC. I picked the DS1307 code from AVRfreaks.
The LCD uses an industry standard controller & I picked up the code from avr-libc examples itself.
AVR ClockCode hosted at github.com - https://github.com/roguehit/avrclock
Now that the breadboard prototype works correctly, I will create a custom PCB for the AVR Clock next week.
7 comments:
arduino sucks
Why does it suck ? After all its just plain AVR.
Nice.. How did u upload the hex file .. avrdude? Can it be done without RTC module..
I used a device called as avrispmkII. It burns *.hex over USB & uses avrdude.
So you connect the AVRISP mkll to the ICSP headers on the arduino ?
Yes that's what I did.
There is another way where the chip can be programmed.
The Arduino ships with a bootloader and the board also has a FTDI (USB to Serial) chip on it. So the chip can be programmed over USB without using the ISP. This is what the Arduino IDE does.
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