3Pcs ATMEGA328 328p 5V 16MHz -Compatible Nano Size Module Board Description: New version, Pro Mini 328 5V 16MHz , -compatible High Quality components and soldering material Bootloader Ready, plug and play. Package included: 3 x Pro Mini 328 5V 16MHz -compatible Notice from customer : If uploading sketches using the IDE fails, follow these steps to update the bootloader: -Prepare an Uno, Mega or similar to act as ISP as described at http://.cc/en/Tutorial/ISP -Wire it up as shown in flasbootloader_connected.png (Picture Reveiw of SKU099688) -Use IDE to flash the bootloader of the corresponding Pro/Pro Mini (5V, 16MHz) to SKU099688 or SKU066315
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