CLOCK USING ATMEGA 8

ATMEGA 8 is one of the cheapest micro controller ,so i decided to make clock using it.The first thing i came across is displaying time hence most general thing is 7 segment display but i can't display all the text expect few ,so i decided to go with 16X2 LCD .Then i came time keeping where recent most of the micro controller offer internal RTC(Real Time Clock) but ATMEGA 8 we don't have internal RTC so i went with external one.Then i came across power the clock ,atmega can run from 1.8v to 5v so i planned to 1s lipo,it worked pretty well...so let start building

• Atmega 8 ic
• 16X2 LCD display
• DS3231 RTC module
• 1S lipo battery
• TP4056 lipo charger module
• drilled PCB
• 16MHZ crystall oscillator
• 22pf capacitor
• 10K resistor

• Simplest method is remove the ATMEGA 328 from arduino uno and insert the ATMEGA 8 in it.
• Connect the SPI pins with another Arduino uno and and burn the boot loader
• follow this video for better under standing

• Connect SCL pin of RTC to A5 arduino
• Connect SDA pin of RTC to A4 arduino
• Connect VCC pin of RTC to 5v arduino
• Connect GND pin of RTC to GND arduino

• Download the clock program
• open the code
• uncomment the following line
• fix the current time
• uplode the code
• now the time is saved to RTC
• now comment back the lines and upload it again
• now remove the ATMEGA 8 from the arduino
• https://drive.google.com/file/d/1yI7EckZE8ESWeCIQO...
• check out this link for more information

• Start by soldering the ATMEGA 8 to pcb
• Then make the oscillator circuit for the ATMEGA 8
• Refer the atmega 8 pinout
• Then fix the RTC and LCD module
• Make the connection according to the circuit diagram
• Fix the lipo Battery and its charger

• I don't have 3d printer so i decide to make it using cardboard and covered it using colored duct tape
• It look shiny and beautiful
• I will recommend to build a 3d printed case to look more professional

• It is in 12hrs format ,so it will display the AM/PM
• It will display the time with seconds
• It will show the day and date in every two mins
• It will show the room temperature in every two mins
• It has the battery backup ,so even when there is no power it will run on its battery
• RTC has its own battery ,so even if the battery backup dead the time won't get rest.
• I hope u will like this project ....!!! Consider subscribing to my YouTube channel !!! Happy Learning.