> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# RTC Board DS1302

**Type:** Product page · **SKU:** WS-9709 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/rtc-board-ds1302.html ([markdown](https://core-electronics.com.au/rtc-board-ds1302.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: RTC.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/RTC

## Restrictions

Restrictions apply to this equipment as it uses button/coin cell batteries:

- The equipment is intended to be used in trades, professions or industries
- The equipment is not intended for sale to the general public
- The equipment is not intended to be used where children are present
- You are aware that this equipment may not meet child safety testing requirements as it is not intended to be used by consumers or general public, but rather, is intended to be used in trades, professions or industries in conjunction with the limitations and restrictions listed above
- You are aware that these restrictions are due to a change in [A](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence)[ustralian legislation in 2022](https://www.accc.gov.au/media-release/businesses-on-notice-as-mandatory-button-battery-laws-commence) for button/coin cell batteries
 
![Button Battery Warning](https://core-electronics.com.au/attachments/uploads/iec-button-battery.png)

A declaration of use will need to be submitted during checkout.

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

## Details

 DS1302 RTC Board## Overview

- Onboard serial RTC chip DS1302
- Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
- Optional format : 24-hour OR 12-hour with an AM/PM indicator
- Supports trickle-charge for the backup battery

- Universal 32.768kHz crystal
- Onboard battery holder
- Features SPI interface, supports 3-wire and/or 4-wire sync serial communication

## Specifications

- Operating voltage: 2.0V ~ 5.5V
- Backup battery voltage : 3.0V ~ 5.0V
- Operating temperature : 0°C ~ +70°C
- Power consumption : <1mW (keeping Clock and RAM data)
- Dimension : 31mm \* 15mm

## Applications

- Hand-held device
- Electronic watch
- Electronic clock

## Photos

[![](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-2_180_180937e605c.jpg)](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-2_452845951a6.jpg)[![](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-3_180_185194cd409.jpg)](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-3_46489ec045f.jpg)[![](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-4_180_176244fba23.jpg)](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-4_40896d35141.jpg)[![](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-5_180_2334374cbc5.jpg)](https://core-electronics.com.au/attachments/localcontent/DS1302-RTC-Board-5_6078659c925.jpg)## Downloads

**Development resources:** demo codes, schematic, datasheets, etc.
**Wiki:**www.waveshare.com/wiki/DS1302\_RTC\_Board

**Weight:** 0.004 kg

## Quick Overview

- DS1302 RTC Board × 1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/d/s/ds1302-rtc-board_l_1_5_1_.jpg)