Content for DS3231

DS3231

The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package. The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I²C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a µP reset.

Arduino Buttonless LED Matrix Clock with ADXL335 sensor

“Multimode Arduino Matrix Clock, Word Clock, Thermometer, and Random Word Generator controlled by various motions. This time I will describe to you a way to make an interesting clock on an 8x8 Led matrix, that does not contain any buttons …

Lazy 7 / Mini

“Hi all, yes. Another 7 segment clock. But this one turned out too nice to be thrown away and it finally replaces my old “Tiny Edition” design with something I’m a bit more… uhm… less unhappy about. Actually I …

DIY Arduino Holographic Matrix Clock

“This is the simplest way of creating a hologram, where the light source and the screen are placed at an angle of 45 degrees. This is another in my series of unusual DIY clocks, this time realized based on the …

Chiming Digital Clock

“A chiming digital clock using an Arduino Nano with the ST7735S colour display. Using the DS3231 RTC and a DFPlayer Mini This is a combination of projects that I have developed. The ST7735S digital clock and the chiming clock. I …

A “Nixie Tube” Style Desk Clock

“I wanted to replicate the design of those cool looking “Nixie Tube” clocks but with a freeform circuit style that I enjoy making, so I decided to make this. Overall I think this idea can be taken further and a …

64x32 LED Matrix Clock

“”I DONT EVEN SEE THE CODE ANYMORE” - The Matrix. Here we have a clock that presents the current time on an 64x32 RGB LED using a “Matrix-like” falling particle effect. The clock also offers other presentation styles, including an “advanced …

Back-to-the-Future: Twin Pines Mall Clock

“Clocks are one of the main themes in “Back to the Future” - and also some of my favorite items for building replica props. Previously, I built three of those clocks, the one in the Time Circuits, the Harold Lloyd clock …

Project  Time Slider

Time Slider

“A digital clock using sliding grids to show or hide the segments of the digits. Each minute the sliders move in a synchronized manner to show the current time. The clock is powered by an Arduino Mega and it uses …

DIY Carbon Dioxide (CO2) Detector

“A couple of weeks ago, I read an article about CO2 levels and how they may indicate higher transmission of COVID-19 in an indoor space. After reading this article, I wanted to take a crack at designing a simple …

Lazy Mini Grid

“A late happy new year, everyone! Here’s another LED grid. The ones I built so far always used LED strips with either 60 or 30 LEDs/meter. And so does this one, it’s using 60 LEDs/meter, 90 …