The Crowduino Uno-SD mainboard is an outstanding microcontroller board fully compatible with the Arduino UNO. It's built on the Atmega328P, a chip widely used in Arduino Uno and other Arduino-compatible boards. Unlike the previous Crowduino with Atmega328, this Uno SD mainboard uses the Atmega16U2 for USB2UART conversion instead of the FTDI232, making program downloading much faster. There's also an SD card slot on the board, which is super convenient for applications like data logging and environment monitoring. Compared to the original Arduino Uno, the Crowduino Uno SD board comes with several great upgrades. First, there's a reset button on the left side, making system reset a breeze. Second, the power circuit is updated. With a selector, users can choose between 3.3V or 5V working voltage, making the board compatible with more sensors using 3.3V logic level communication. Third, it uses a Mini USB connector to avoid potential risks when connecting to shields. And finally, it has an on-board SD card slot. Specifications include a microcontroller of Atmega328P, a working frequency of 16MHz, 2K of RAM, 32K of Flash, a power supply of USB 5V or external power 7 - 12V, and I/O logic of 3.3V/5V. The packing list includes one Crowduino Uno SD Board and one Mini USB Cable. Documentation can be found on the Wiki Page.
Using the Crowduino Uno - SD Version 1.5 is quite straightforward. First, connect the board to your computer using the Mini USB cable included in the package. This allows you to download programs onto the board. When choosing a power source, you can either use the USB 5V or an external power supply of 7 - 12V. The power circuit has a selector, so you can pick the 3.3V or 5V working voltage according to your sensor requirements. If you need to reset the system, just press the reset button on the left side. For data - related applications, insert an SD card into the on - board SD card slot. When it comes to maintenance, keep the board clean and dry. Avoid exposing it to extreme temperatures or humidity. If you're not using it for a long time, store it in a safe place. Also, be careful when connecting shields to the board to prevent any damage to the Mini USB connector.
