sat3ll / avr-digital-desk-clock

Arduino/barebones clock with DS1307 RTC and 5110 LCD

This code was written a long time ago when I began toying with C and MCUs.
Toolchains, equipments and anything not in the repo I don't possess it anymore.
Uploaded for archival reasons.

AVR Digital Desk Clock

A digital clock using the Nokia 5110 LCD (PCD8544), DS1307 RTC module and a megaAVR chip (ATmega328P) @ 16MHz.
This project assumes the RTC module is already with the correct date set and provides no way to adjust it.
A prebuilt binary is provided in the builds directory.

Instructions

Wire the following:

DS1307	AVR / Arduino Uno R3
SCL	PC5 / Analog Input 5
SDA	PC4 / Analog Input 4
VCC	5V or 3.3V
GND	GND

PCD8544	AVR / Arduino Uno R3
RST	PB1 / Digital Pin 9
CE	PB2 / Digital Pin 10
DC	PB0 / Digital Pin 8
Din	PB3 / Digital Pin 11
Clk	PB5 / Digital Pin 13
VCC	3.3V or 5V
GND	GND

Depending on your LCD module, you may need to use voltage level converters.