“Which type of board I bought” is the first challenge I faced to start clock project. Huh?Īlso pin layout is very different from Uno and Micro boards and confusing.Įspecially location of I2C pins including A4 (SDA) and A5 (SCL) (analog pin 4 and 5) on the pro-mini board is interesting. The marking on the backside of the board saying “simple”…. There seems diverse pro-mini boards are available using different Input voltage (3.3v, 5v), processor type (ATmega328P, ATmega168) and clock speeds (8M, 16M, 20M).
#USING ARDUINO PRO MINI PRO#
Arduino Pro Mini (5V, 20 MHz) w/ ATmega328P ? Arduino Pro Mini (5V, 16 MHz) w/ ATmega328P Arduino Pro Mini (3.3V, 8 MHz) w/ ATmega168 Arduino Pro Mini (3.3V, 8 MHz) w/ ATmega328P Therefore, I was searching web pages to get information about pro-mini board.Īnd I knew that there are several variants are available as follows. When I saw the “The simple” marking at the backside of the board, it seem like playing joke on me. Let’s start story about making digital clock with pro-mini.Īs you can see, there are no kind and detail explanations available about the board I received.Īlso soldering pin-heads by myself is necessary. That’s why I’m choosing pro-min board as its price is the half of Uno and Micro boards.īut according to the how-to in several web-pages I saw, pro-mini is a little bit special for configuring and using it. When you using arduino Uno or Micro boards, circuit wiring and uploading program is very easy as there are many how-to contents are available in Internet.īut for the simple project such as clock making, personally thinking that using expensive Uno or micro boards is a kind of luxury.
Choosing correct voltage regulator is necessary for power up the clock circuit 0.91 inch OLED is using I2C interface and DS3231 real time clock module also using I2C for communication
#USING ARDUINO PRO MINI SERIAL#
As pro-mini board lacking USB interface for programming, additional break-out board (USB to serial programmer) is necessary for uploading sketch code Pro-mini board type is very confusing as 3.3v and 5v type of boards are available While making the circuit above, I need to handle several challenges like below. Therefore, simple project is chosen as digital clock making is relatively easy and not much complex. It’s the first time for me to utilize the very small OLED display and tiny pro-min board. There are 16 digital I/O pins (6 of them are PWM out), 8 analog input pins, a 16 MHz crystal oscilator and a reset button on the board.This is digital clock using 0.91 inch OLED and arduino pro-mini. Pro Mini is a microcontroller board based on Atmega328.
Pro Mini 328 Development Board for Arduino - 3.3V/8MHz.Pro Mini 328 Development Board Compatible with Arduino - 3.3V/8MHz (With Headers) Package content: It is not possible to use one instead of the other one. However, Pro Mini has a different pin array than Mini board. Pro Mini is very close to Arduino Mini board respect its features. Pro Mini comes with unsoldered headers in a package.
Pro Mini 328 Development Board Compatible with Arduino - 3.3V/8MHz (With Headers)
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