Important: After putting the Cart Reader together you will first have to connect an USB cable to the Arduino and charge up the battery for a second before the battery module will enable it's output. It seems to be safety feature of the battery module. To be sure just leave the cable connected until the battery module lights up blue indicating the charging is completed.
USB ports
The two USB ports located on the battery module will not be used. The battery gets charged over the USB port on the Mega 2560 Pro (embed).
On-Off Switch
The switch to turn the Cart Reader on or off is found on the battery module.
However the battery module seems to have a fuse so if the Cart Reader does not turn on either plug in an USB Cable or remove the battery, wait a little and insert it back in to reset the fuse.
Important: The OSCR will not start if no cart slot adapter is inserted into the main PCB.
Basic controls
The Open Source Cartridge Reader is controlled with an rotary encoder. Turn clockwise to go down and counterclockwise to go up in the menu. Press the knob to execute a selection. Press the reset button to restart the Cart Reader.
During operation progress is indicated either by a progress bar on the LCD or by a small LED on the Mega 2560 Pro (embed).
RGB LED
Once a read or write operation is finished the RGB LEDs on the LCD module will turn green if everything seemed to work out or red if there was an error.
It is very important to understand that a green light does not mean the dump is perfect since for most cartridges only a small portion of the ROM will be compared against a checksum. To be sure you should always copy the ROM to your PC and use an appropriate tool to check if the dump was successful.
SD card
FAT(SD cards up to 2GB), FAT32(SDHC cards up to 32GB) and exFAT(SDXC 64GB and up) are supported. Some SD cards might be incompatible and will lead to errors.
Voltage selection
The battery module supplies the Cart Reader with 5V which then gets converted to 3.3V by the LCD module. The Mega 2560 Pro (embed) and the cartridge slot will run at the voltage chosen by the inserted cartridge slot adapter PCB.
Cartridge slot adapter
To remove a cart slot adapter slide a pen underneath the adapter to apply even pressure when pulling up or else the pins might bend.
Battery module
The 3V BAT and 5V BAT pins on the Cart Reader will carry a voltage even if the battery module is switched off. So don't place the Cart Reader onto a metallic surface or you will short out the battery.
The Cart Reader will not start without a battery in the battery module.