DS1302 RTC Real Time Clock Module without battery

Tracks seconds, minutes, hours, day, date, month, and year
Leap year compensation for accurate calendaring
3-wire serial interface (CLK, I/O, CE) – Arduino compatible
Low power consumption for battery-backed operation
Onboard crystal oscillator for stable timekeeping
Includes battery holder for CR2032 (battery not included)
Supports 12-hour or 24-hour time format

SKU: 1347 Categories: Electronic Modules, RTC Module Tags: Electronic Modules, RTC Module

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Description

DS1302 is DALLAS company launched a trickle charge clock chip, containing a real-time clock/calendar and 31 bytes of static RAM, communicating through serial interface simple and single-chip microcomputer. The real-time clock/calendar circuit provides seconds, hours, days, weeks, months, years of information, a number of days in the month and leap year can automatically adjust. The clock operation instructions through the AM/PM decided to use 24 or 12-hour format.

Between DS1302 and single-chip microcomputer can simply use synchronous serial communication method, only three lines:
(1) RST
(2) I/O reset the data line
(3) SCLK serial clock.

Clock /RAM read/write data to a byte character set or as many as 31-byte communication. DS1302 work power consumption is very low to keep the data and clock information when power is less than 1mW

Wiring method (to provide procedures, for example, can pick up any IO port, in the procedure to modify the port definitions :

VCC:+5V/3.3V
GND: GND
CLK: P02
DAT: P01
RST: P00

Note:

1.VCC and GND do not reverse, so as not to burn the chip
2.51 SCM P0 port to receive a pull-up resistor, if your computer is not connected pull-up resistor, the data can be the string to the other port.

Specifications and Features:

The real-time clock counts minutes, seconds, date, hours, month day of the week, year and leap-year compensation up to 2100.
318 temporary data storage RAM
Working current of 2.0V, less than 300nA
Read / Write clock or RAM data with two kinds of mode of single-byte transfer mode and multi-byte character set
8 pin DIP package or optional 8 pin SOIC package based on the surface assembly
Simple 3 wire interface
Compatible with TTL Vcc=5V
Double power supply pipe for main power and backup power supply.

Useful Links:

Arduino DS1302 Real Time Clock
Using the Real-Time Clock module on Raspberry Pi

Package Includes:

1 x DS1302 RTC Real Time Clock Module with Battery

🔌

Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
DS1302	VCC/GND/CLK/DAT/RST	3.3-5V / GND / board digital / board digital / board digital

📟

DS1302 RTC Real Time Clock Module without battery

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

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DS1302 RTC Real Time Clock Module without battery - Arduino Uno

DS1302 RTC Real Time Clock Module without battery - Arduino Nano

DS1302 RTC Real Time Clock Module without battery - Arduino Mega

DS1302 RTC Real Time Clock Module without battery - ESP32

DS1302 RTC Real Time Clock Module without battery - ESP8266

DS1302 RTC Real Time Clock Module without battery - STM32

DS1302 RTC Real Time Clock Module without battery - Raspberry Pi Pico

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_arduino_uno.inoArduino Uno

745 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=5, DAT=6, RST=7 on Arduino Uno (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(6, 5, 7);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_arduino_nano.inoArduino Nano

746 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=5, DAT=6, RST=7 on Arduino Nano (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(6, 5, 7);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_arduino_mega.inoArduino Mega

746 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=5, DAT=6, RST=7 on Arduino Mega (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(6, 5, 7);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_esp32.inoESP32

745 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=18, DAT=19, RST=21 on ESP32 (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(19, 18, 21);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_esp8266.inoESP8266

747 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=D5, DAT=D6, RST=D7 on ESP8266 (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(D6, D5, D7);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_stm32.inoSTM32

751 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=PB6, DAT=PB7, RST=PB8 on STM32 (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(PB7, PB6, PB8);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

📄 File: ds1302_rtc_real_time_clock_module_without_battery_-_raspberry_pi_pico.inoRaspberry Pi Pico

757 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// CLK=18, DAT=19, RST=20 on Raspberry Pi Pico (bit-banged, so any digital pins work)

6#include <ThreeWire.h>

7#include <RtcDS1302.h>

9ThreeWire myWire(19, 18, 20);

10RtcDS1302<ThreeWire> Rtc(myWire);

12void setup() {

13 Serial.begin(115200);

14 Rtc.Begin();

15 if (!Rtc.IsDateTimeValid()) {

16 Rtc.SetDateTime(RtcDateTime(__DATE__, __TIME__)); // set to compile time once, then it keeps its own time on battery

17 }

18}

20void loop() {

21 RtcDateTime now = Rtc.GetDateTime();

22 Serial.print(now.Year()); Serial.print("-"); Serial.print(now.Month()); Serial.print("-"); Serial.print(now.Day());

23 Serial.print(" "); Serial.print(now.Hour()); Serial.print(":"); Serial.println(now.Minute());

24 delay(1000);

25}

Project Notes:

3-wire (bit-banged) real-time clock module (no battery backup - resets on power loss).

Required Libraries:

Rtc by MakunaGitHub

Specification

WeightWeight	9,0000 g
Dimensions	3,2 × 2 × 1 cm
Product Name	DS1302 RTC Real Time Clock Module (without battery)
Type	Real Time Clock (RTC) Module
RTC Chip	DS1302
Interface	Serial (3-Pin I/O: CLK, DAT, CE)
Supply Voltage	5V DC
Timekeeping	Seconds, Minutes, Hours, Day, Date, Month, Year (with Leap-Year Compensation)
Battery Backup	Not Included (Supports 3V Coin Cell)
Clock Accuracy	±2 ppm at 25°C
Operating Temperature Range	-40°C – +85°C
Mounting Type	PCB Module / Breadboard Compatible
Material	FR-4 PCB with SMD Components
Applications	Arduino / Microcontroller Projects, Timekeeping, Alarm Clocks, Data Logging
Package Contents	1× DS1302 RTC Module (without battery)

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