![background image](http://html.mh-extra.com/html/sparkfun/micromod-dev-18575/micromod-dev-18575_hook-up-manual_1339615007.webp)
The overall functionality of the Single and Double Main Boards are the same. We'll use the Single Main Board
more in this section to highlight the features since this is also included in the Double Main Board. We'll switch to
the Double Main Board when necessary to highlight the features that are only included in the Double Main Board.
The only differences are that the Double Main Board includes:
two jumper shunts
ability to add a second MicroMod Function Board to the mix
board's width
Main Board - Single Measurements
Main Board - Double Measurements
(Zoomed Out)
Power
There are two ways to power the Main Boards, Processor Board, and Function Board(s).
USB
Single Cell LiPo Battery
It is fine to connect a power source to the USB connector and LiPo battery's JST connector at the same time. The
MicroMod Main Board has power-control circuitry to automatically select the best power source.
Power
USB
One option of powering the board is through the USB Type C connector. You will need a USB Type C cable to
power the board with
5V
. Power connected to the board's USB C connector will go through a resettable PTC fuse
(rated at 2A max) and then the AP7361C 3.3V voltage regulator (rated at 1A max). The little green component
close to the USB connector is the resettable PTC fuse while the square IC is the voltage regulator. The voltage
regulator accepts voltages between
~3.3V to 6.0V.