SKU: 17234798136

Adafruit PiRTC - PCF8523 Real Time Clock for Raspberry Pi 3386

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Description

Adafruit PiRTC - PCF8523 Real Time Clock for Raspberry Pi 3386This 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) including the Pi 1, Pi 2, Pi 3, Pi Zero, A+, B+, Pi 4, etc. Fully


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) including the Pi 1, Pi 2, Pi 3, Pi Zero, A+, B+, Pi 4, 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. We recommend you purchase a coin cell battery to use with this product.

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.

For setting up your Raspberry Pi to use the PiRTC, check out our detailed tutorial!

 

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

 

[Description provided by Adafruit]

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SKU: 17234798136

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steven whitis
Natrona Heights, US
★★★★★ 5
Fixes flats and old tires like a charm
Style: 1 gal
This stuff is awesome. If you have tractor tires, ATV tires, bike, tires, hell, any tires that hold air. This stuff is awesome. Awesome. Awesome. It does not work for highway vehicles, i.e. Cars and truck trucks. But anything else it’s great. Dollies, air compressors, wheelbarrows, the stuff is awesome dude.
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Reviewed in the United States on April 5, 2026
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Tim & Tammy
Los Angeles, US
★★★★★ 5
slime is and has always been amazing for bike tires and other small pneumatic tires
Style: 1 gal
this is a great value, I have been using slime in my tubes of my bikes and a small inflatable pneumatic tires for probably 30 years, and I can say slime has only improved, and it works fantastic, this is a very good way to save money, and it works great on goat heads and several other ways your tires can get punctured, I still always recommend carrying a small air compressor or pump, but for the price point you just cannot beat slime, every bike shop should always carry this.
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Reviewed in the United States on April 18, 2026
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John Quargnenti
Louisville, US
★★★★★ 3
They need to find a better way to ship it
Style: 1 gal
What was left in the bottle worked great. However, the cap was off of the jug when I opened the package. Ididn't have enough for the other tires.
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Reviewed in the United States on March 19, 2026
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M. O. Novilla
Draper, US
★★★★★ 5
TireJect Product Featured on Youtube Channel "sixtyfiveford" Works Fantastic!
Size: 8oz MTB Tire Sealant Kit, Size: 8oz MTB Tire Sealant Kit
I recently had an opportunity to work on an old Troy-Bilt Snow Blower with a Carlisle Stud Bias Tire - 4.80-8 4 that had a continual leak and would not hold pressure for more than a day. After investigation, I discovered that it "Champagne" sized bubbles coming from an area on the sidewall that I circled in yellow "China" marker. Because of the size of the tire, I decided to purchase the "TireJect Mountain Bike (MTB) Tire Sealant Kit because I didn't require a lot of material to seal the tire. The TireJect Mountain Bike (MTB) Tire Sealant Kit came with an single 8oz container and I used 4 of those 8oz's in this single tire. The TireJect material sealed up the area beautifully. After the sealant cured, I was able to pump up the tire to 15PSI and it has held it's pressure for more than a week now. You can see from the photos, that the sidewalls in that yellow circled area were actually cracked (probably due to the tire sitting flat for more than a year). I highly recommend this product over previous products I have used in the past (Slime).
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Reviewed in the United States on October 3, 2025
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J. McGuire
Port Orchard, US
★★★★★ 5
Great Product
Size: 8oz MTB Tire Sealant Kit
This is unbelievable. It works better than any similar product on the market.
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Reviewed in the United States on November 4, 2025

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