DS1302 Clock Module Real-Time Clock Module RTC for Arduino AVR ARM
描述
⏰ Time is on your side! Elevate your projects with precision.
- COMPACT DESIGN - Space-saving module perfect for any project.
- SMART CALENDAR - Automatically adjusts for leap years and varying month lengths.
- FLEXIBLE FORMAT - Choose between 12-hour and 24-hour display options.
- PRECISION TIMING - Stay on schedule with accurate real-time clock functionality.
- USER FRIENDLY INTERFACE - Easily integrates with Arduino, AVR, and ARM systems.
The DS1302 Clock Module is a versatile real-time clock and calendar solution for Arduino, AVR, and ARM projects. It features a simple serial interface, 31 bytes of static RAM, and automatically adjusts for leap years and month lengths, making it an essential component for time-sensitive applications.
评论
R**C
Note about DS3231 chips
I received all DS3231M marked chips. I've used a lot of these modules over time and the DS3231N are usually mis-marked DS3231M chips. You can tell because the M does not have a variable frequency clock output (SQW pin) and the N does. In the more than a dozen modules I've only found two genuine DS3231N chips.Also, the M is spec'd at ±5PPM accuracy and the N is ±2PPM.Mis-marked chips are common.
R**A
5v DC pin is not active
The units I was sold do not output 5v DC on the 5v pin. It outputs about 0.83V.I've tried multiple USB A <-> USB C cables, all to no avail.
P**G
SQW
The SQW was tricky to get working. This is the only code that worked to set up the SQW. // set up the square wave. Wire.beginTransmission(0x68); Wire.write(0x0E); Wire.write(0x00); Wire.endTransmission();
**E
These work great for IoT projects.
These are great & easy to use.I am using library <DS3232RTC.h>
M**E
It’s a clock
Purchased these for the components on the PCB since it was cheaper than buying the components on their own. It worked great right out of the box and has reliable kept the time so far. With multiple tests of power cycles, the trickle battery has kept the time accurately.
K**N
Not exactly a RTC module...
Yes, they work, but it's not a stable and accurate Real Time Clock module. I wanted to build a ham radio UTC clock, but it just doesn't quite do the job when the power is off and the battery is powering the module. I found it can be off by several minutes in a 24RH period.
D**.
Wonderful!!! Works on ESP32 with TinyGPS.h
I bought these for a college lab project. Worked great!! The tinyGPS.h library works on Arduino and ESP32 flawlessly. :-)
R**N
Price OK for clock sub assembly with battery included
The price was OK for the DS3231/EEPROM module with the CR2032 Lithium battery. The SMD parts have been infrared soldered (as opposed to riskier hand soldering). The batteries have been installed (my guess based on code date is over 1 year). Normally there is a piece of thin plastic with a "pull tab" that insulates them from running. Alternately, the battery is packaged separately and installed by the user. Product photos give the impression that the batteries are not installed when purchased.
