Here is the link to the complete pinout diagram of Arduino Pro Mini. The input to the voltage regulator is labeled as Raw (as shown in the schematics on the right) and is accessible through the RAW Pin on the Arduino Pro Mini board (as shown in the top right corner in the Figure above). The onboard components of Arduino Pro Mini for the voltage regulator circuit is shown on the left and the voltage Regulator circuit is shown on the right. The voltage regulator circuit is shown in the Figure given below. The voltage regulator circuit is handy if you want to drive your Arduino Pro Mini from an unregulated voltage source. The 3.3-volt regulator converts 4-12 volts input into 3.3 volts output and the 5-volt regulator converts 6-12 volts into 5 volts output. Voltage Regulator Circuit:Īrduino Pro Mini has an onboard 3.3 or 5 volts voltage regulator depending on the board type. Now lets discuss each and every component on this board.

On the other hand, the schematics for low-cost Chinese clones are also very similar, with minor differences and I will discuss those differences at the end of this tutorial. There are also other good manufacturers of Arduino Pro Mini boards and their schematics are almost the same. This is the schematic diagram of the Arduino Pro Mini board manufactured by Sparkfun. Go through the figure thoroughly because we will be explaining the working of every onboard component. It is a fairly simple board with minimal onboard components. The schematic of the Arduino Pro Mini is shown in the Figure given below. In this article, you will learn about Arduino Pro Mini board Schematics and the use of each and every component on this board. Arduino Pro Mini board is widely used in embedded systems because this board only has the necessary onboard components with a small form factor and low power consumption.

Arduino pro mini