# Adafruit PiRTC - PCF8523 Real Time Clock for Raspberry Pi

**Type:** Product page · **SKU:** ADA3386 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/adafruit-pirtc-pcf8523-real-time-clock-for-raspberry-pi.html ([markdown](https://core-electronics.com.au/adafruit-pirtc-pcf8523-real-time-clock-for-raspberry-pi.html.md))

This is a great battery-backed real time clock (RTC) that allows your Raspberry Pi project to keep track of time if the power is lost. Perfect for data-logging...

## Pricing

- **Price:** $15.15 (inc GST) — $13.77 AUD, exc GST
- **Quantity discounts:** 10+ $13.36 (exc GST) · 50+ $13.08 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 500 more in 8–12 days.

## 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.

## Description

This is a great battery-backed real time clock (RTC) that allows your Raspberry Pi project to keep track of time if the power is lost. Perfect for data-logging, clock-building, time-stamping, timers and alarms, etc. Equipped with **PCF8523** RTC, it works great with the Raspberry Pi and has native kernel support.

Works perfectly with any [Raspberry Pi (or similar single board linux computer)](https://learn.adafruit.com/adding-a-real-time-clock-to-raspberry-pi) including the Pi 1, Pi 2, Pi 3, Pi Zero, A+, B+ etc.

- Fully assembled & tested PCB plugs directly into your Pi's GPIO pins - **No soldering required!**
- Will keep time for 5 years or more

**Note: This product does not come with a CR1220 coin cell battery.** [Adafruit recommend you purchase a coin cell battery to use with this product.](https://core-electronics.com.au/cr1220-replacement-battery-for-icufflinks-inecklace.html)

The PCF8523 is simple and inexpensive but not a high precision device. It may lose or gain a second or two per day. For a high-precision, temperature compensated alternative, [please check out the DS3231 precision RTC](https://core-electronics.com.au/adafruit-ds3231-precision-rtc-breakout.html).

[For setting up your Raspberry Pi to use the PiRTC, check out Adafruit's detailed tutorial!](https://learn.adafruit.com/adding-a-real-time-clock-to-raspberry-pi/set-up-and-test-i2c)

## Technical Details

Product Dimensions: 21.0mm x 20.0mm x 12.0mm / 0.8" x 0.8" x 0.5"

Product Weight: 2.2g / 0.1oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/3/3/3386-00.jpg)