3PCS Tiny I2C DS1307 Real Time Clock Module AT24C32 Storage Memory High Precision DS1307 Clock Module for AVR ARM PIC

This Real-Time Clock (RTC) module is a great addition to any electronic project. The quality is decent, and it works exactly as intended. The package includes three pieces, which is a great value, especially for those working on multiple projects or wanting backups. Setup was straightforward, and the module integrates well with microcontrollers like Arduino and Raspberry Pi. It keeps time accurately, even after power cycles, making it a dependable choice for time-sensitive applications.One of the best things about this module is its versatility. Whether you need precise timekeeping for data logging, automation, or other embedded applications, this RTC does the job well. The battery backup feature ensures that the clock continues running even when power is lost, which is essential for maintaining accurate timestamps. The build quality feels solid, and the connections are reliable, ensuring stable performance. For anyone looking for an affordable and effective real-time clock solution, this is a great option.I’m very happy with this RTC module. It delivers exactly what I expected, with reliable performance and a great price for a set of three. It’s a must-have for anyone working with time-sensitive electronics, and I highly recommend it for hobbyists, students, and professionals alike. If you’re looking for a simple, accurate, and easy-to-use real-time clock module, this one won’t disappoint. I’ll definitely be purchasing more for future projects!

If you're a hobbyist, tinkerer, or just someone passionate about clock-related projects, these DS1307 Real Time Clock (RTC) Module with AT24C32 Storage Memory is a delightful find—especially at its jaw-droppingly low price of under $2 per unit! In an era dominated by internet-connected devices that effortlessly sync with NTP servers to deliver atomic clock accuracy, you might wonder why standalone RTC modules like these still matter. The answer lies in their simplicity, reliability, and versatility, making them a fantastic choice for offline or minimalist projects where internet connectivity isn’t an option or desired.I stumbled upon thesef DS1307 modules while browsing for components, and though I didn’t have an immediate need for them, inspiration struck: a retro-inspired Nixie tube clock for my bedroom. I’ve always wanted to build one, and these modules seem like the perfect fit for straightforward, no-fuss timekeeping.To put them to the test, I dusted off my trusty (and rusty) Arduino Uno and hooked up one of the modules. Using the DFRobot DS1307 library, I had it up and running in no time—proof of how beginner-friendly these little boards are. The setup was a breeze, and the module ticked along without a hitch. For those who like options, there’s no shortage of compatible libraries out there, so you can easily tailor the experience to your preferred coding style or project requirements. I also tracked down the schematic and technical manual online at pdf.direnc.net/upload/tinyrtc-i2c-modul-datasheet.pdf, which provided a clear overview of the module’s pinout and functionality—a handy resource for anyone diving deeper.The modules also offers an onboard AT24C32 EEPROM, a 32-kilobit non-volatile memory chip for storing customization. Need to store settings, calibration data, or other persistent information for your project? This little bonus feature has you covered, adding significant value to an already budget-friendly product. It’s a thoughtful inclusion that opens up creative possibilities beyond simple timekeeping.Now, a closer look at the hardware itself: the chips on these modules appear to be generic, with no visible manufacturer branding. This suggests they’re mass-produced components, likely sourced from the vast ecosystem of affordable electronics manufacturing. While this keeps costs down, it does raise questions about long-term stability and time drift—factors I haven’t fully evaluated yet due to limited testing time. During my initial experiments, I checked the square wave output and confirmed it’s running at a steady 1 Hz, which is exactly what you’d expect from the DS1307’s design. That said, I’ll reserve final judgment on accuracy and reliability until I’ve integrated it into my Nixie clock project and observed its performance over weeks or months. For now, it’s a promising start.At this price point—less than $6 for a pack of three—these DS1307 modules are an absolute steal. They’re ideal for hobbyists working with platforms like AVR, ARM, or PIC microcontrollers, and their I2C interface ensures seamless integration into a wide range of setups. Whether you’re building a clock, a data logger, or anything else that needs offline timekeeping, these modules deliver solid functionality without the complexity of internet-dependent alternatives. So far, they’ve exceeded my expectations for the cost, and I’m excited to see how they hold up in a real-world project. Stay tuned for an update once my Nixie tubes are glowing and these little RTCs have had a proper long-term test!