How to make an Arduino Pro Mini bare bones with Real-time Clock

How to make an Arduino Pro Mini bare bones with Real-time Clock


One thing I didn’t find clearly over the internet is how to make an Arduino Pro Mini bare bones, that is, from the scratch, and how to make one on the breadboard. This is really useful if you want to make a custom pcb/smd circuit, because you will be able to test your hardware ans software before sending the schematics and the layout of the board to the manufacturer. Also, it will make your circuit Arduino compatible. If you read my previous article, here, I showed how to make a simple circuit with the PCF8563 real-time clock, reading and writing it. Now it is time to put your Atmega 328p on the breadboard and complete a simple read of the clock, maintaining the power consumption low, and for that I will use the LowPower library.

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Real-time Clock ICs with Arduino


ZZDS1307_Circuito-Integrado-DS1307-CI-RTC-SERIAL-64X8-8-pinos_1Well, this is my very first post on this blog. First of all, let me introduce myself. I’m a Brazilian engineer graduated in mechatronics in a university called USP (or University of São Paulo). I don’t expect for you to know it, but for people that works in academics, it is a well known university, that was ranked 39º best of the world on the year 2009. However, English is not my primary language, because here we speak Portuguese. So expect some spelling mistakes.

On this first post, I’m going to describe some of the RTC modules available on the market, and how to use them. The advantages and disadvantages about each other and also their usage to make one of my projects, that is an arduino based smartwatch, with accelerometers, compass, altitude and pressure sensor. For this purpose, I had to search for the module with the least power consumption possible. For most of this I have to thank Dennis, another member on Instructable that helped me on my first steps with RTCs.

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