DS1302

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator. Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock information on less than 1µW.

Main Content

LCD Alarm Clock with many faces

“An LCD1602 alarm clock that includes many of the other LCD1602 clocks found on maker sites. Looking around for something to build, I decided on a LCD 1602 clock. After perusing the Web and finding many different implementations, I decided …

Clockception - How to Build a Clock Made From Clocks!

“Hi All! This is my submission for the 2020 First Time Author Contest! If you like this project, I’d greatly appreciate your vote :) Thanks! This instructable will guide you through the process for building a clock made of clocks …

Mechanical Seven Segment Display Clock

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Project  UTixClock

UTixClock

“First time I saw this clock in a video from one of my favourite YouTube channels named SmarterEveryDay. I instantly liked the idea and wished to buy one. Then I searched in Google and found this website which sells the …

TinyLED Displays

“DIY Tiny LED Displays … need I say more … I’ve seen a few other people experimenting with making custom LED displays using discrete LEDs so I thought I’d like to take my own stab at it.”

DS1302 Clock With a 2.4 TFT LCD

“Hello there! Today i will show you how to make a simple clock with a RTC and a TFT LCD for Arduino. Simple project for beginners, it can be assembled and set up for less than 30 minutes. A few …

AWS - Arduino Weather Station

“Very useful project made at school that detects some weather data. Story AWS, Arduino Weather Station, provides accurately round-the-clock data for the environment. In particular it is based on an Arduino microcontroller board, and it supports a full stuck of …

Aquarium Light PWM With Arduino

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Project  The JClock

The JClock

“Hello, my name is James Hubbard and I created this clock that I call the jClock. It uses a ds1302 real time clock module that can keep time more precisely than the Arduino can. This is what you will need …

Setup DS1302 RTC Module With Keypad + Arduino + LCD

“Hello, I just made this little project, I hope you like it, as the title says it’s about how to use a keypad to set the DS1302, it’s one of the basic projects you can add it to …