RTC (Real Time Clock) DS1307 module

Marsoni

M251S

$140.00

Get it in 3 business days with 1 day shipping. Friday, May 29

RTC (Real Time Clock) DS1307 moduleThis is a real time clock (RTC) based on IC DS1307 that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Use for data logging, clock, timers and alarms. The DS1307 can be easily connected to the Arduino, with an I2C bus interface. Module with real time clock and backup battery power (battery included). It allows you to read the time in the form of hours, minutes and seconds, and dates:

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The hole made by the included holesaw was the perfect size for the insert. They work well and cosmetically look much better than a raw hole in the wood. I tried the cable wrap and inserter and both make the job of wrapping and securing the cables much easier. Overall a good product and a good value.

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Reviewed in the United States on January 17, 2025

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Grant

San Leandro, US

★★★★★ 5

Great for small projects. Nice fit.

I purchased this set while building a couple of end tables. They fit like a glove and it's really nice that they come with the hole saw bit. It's a great set for what you get.

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Reviewed in the United States on May 19, 2026

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Sia G

New York, US

★★★★★ 5

My desk looks organized

Works great

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Reviewed in the United States on April 18, 2026

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NegativeG

Boise, US

★★★★★ 5

Includes everything you need and a bonus to get the cord wrap

I bought this to route the cords up to the monitor on a height-adjustable desk. The top of the desk is an inch thick, and this was easy to drill through. To make sure I got a clean cut and did not damage the top, I put painters' tape on the area where I wanted to cut and drilled a small starter hole to get it exactly in the right spot. It cut a really clean hole from the top, and the plastic insert fit perfectly. Once I got the hole cut and the wires run where I wanted them, I put the cord wrap on. The tool that comes with the cord wrap is really slick and super easy to use. I was able to bundle together three cords that hang off the side of the desk. Given that the desk is adjustable, it was a nice bonus to get the cord manager with the kit, as it keeps the cords from getting hung up in the desk when adjusting it. I'm very happy with the purchase, great price.

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Reviewed in the United States on December 14, 2025

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Dean Thompson

Whiting, US

★★★★★ 4

Good product

The hole covers are great. As far as the hole cutting bit. Not so much. But still worth the price.

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Reviewed in the United States on October 26, 2025