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Mini48U is a STM32 development board for OpenSTM32 project (https://github.com/gbulmer/openstm32). This design is significantly modified Maple Mini R2 and further development of Mini48 with some changes in schematic (no separate analog ground, added RTC crystal comparing to Maple Mini and differently connecter RESET pull up resistor) and reworked Mini48 PCB for 0.6" row header spacing. Copyright (C) LeafLabs (sorry, don't know exact years) Changes Copyright (C) 2012 Sergiy Yevtushenko. Just like original design, modified version is distributed under terms and conditions of Creative Commons Attribution-ShareAlike license (see http://creativecommons.org/licenses/by-sa/3.0/legalcode for details). Features: - Small (51.2x18.6mm) breadboard compatible design. - Compatible with Maple Mini, although ADC noise characteristics might be worse - RTC crystal on board Two versions of the board are present. The design of both is very similar, the differences lie in used components. Version 0.6.9 uses smaller parts for USB circuit and buttons. Also it attempts to solve main problem of original Maple Mini and uses LM1117 for main power LDO in SOT223 package. The design files were created in Eagle 5.11 (version 6.1) and Eagle 6.1 (version 6.9). Comments and suggestions are welcome. Regards, Sergiy Yevtushenko <Sergiy.Yevtushenko@gmail.com>