RTC DS1302 Real Time Clock Module - Cover Expand

RTC DS1302 Real Time Clock SPI Module

Waveshare Waveshare



This Real Time Clock Module gives your electronics the ability to keep time, with great features that include AM/PM indicators and trickle-charging.

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Keeping time is quite an important skill for us humans to have, but even with watches, clocks, sunlight patterns and many more factors that help us identify time easily, we are still prone to losing track of it. Electronics, on the other hand, don’t always have the same kinds of senses, which is why these DS1302 Real Time Clock Modules are so damn valuable in electronics Prototyping and project building, as they give your Modules and other components a frame of reference to keep track of, which can then either be used for extremely precise high speed processing, or can be translated into human time like in the case of digital watches and general time-telling devices.

This RTC Module is somewhat basic, but offers a great level of functionality that includes leap-year compensation up to year 2100, optional 12/24 hour formats with AM/PM indicators, integrated battery trickle-charging capabilities, as well as a universal 32.768kHz timing crystal. These features, in conjunction with the fact that the module supports both 3-Wire and 4-Wire sync serial communication via SPI interface, make it ideal for adding to almost any project that needs real time clock capabilities.


DS1302 Real Time Clock SPI Module  -  Technical Specifications:

  • Onboard Serial RTC Chip

– DS1302                                                            

  • Timing Crystal

– Universal 32.768kHz Crystal

  • Time Format Options

– 12 Hour / 24 Hour

  • SPI Interface Support

– 3Wire and/or 4Wire Sync Serial Comm’s

  • Operating Voltage

– 2V to 5.5V DC

  • Backup Battery Voltage

– 3V to 5V DC

  • Power Consumption

– <1mW for Clock and RAM data

  • Battery Charging Method

– Trickle-Charge

  • Battery Holder

– Integrated

  • Weight

– 4g

  • Dimensions

– 15 x 31mm


Additional Resources:

  • The Official DS1302 RTC Board Wiki, which features the user manual and schematic, as well as demo code and software for using this module effectively.


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RTC DS1302 Real Time Clock SPI Module

RTC DS1302 Real Time Clock SPI Module

When it comes to producing unique electronics components and modules, there are very few brands that can provide the quality that Waveshare can. Based in the Futian District in Shenzhen, China, Waveshare are experts in developing electronics to a high standard of quality, which have been thoroughly tested to work seamlessly with corresponding development platforms and systems – such as the E-Ink HATs for Raspberry Pi’s.

What we love most about Waveshare is how they are dedicated to providing quality products, and have moved away from the typical “Made in China” stigma – cheap products with cheap parts and components. Instead, Waveshare understand the value of supplying quality products and building sustainable relationships with international resellers and distributors. They know that consistent quality will result in consistent business, and as such they always ensure strict quality control for each and every product that comes out of the manufacturing plant.

We are always excited to peruse through their vast catalogue of exciting new products to find unique modules, components or even entire development boards that are designed with quality in mind. Because we know that every cent that we spend with Waveshare will be well-spent, with each product that order adding real value to our own catalogue of products.