tinyUSBboard

Arduino compatible without extra programmer and/or FTDI chip (USB<->serial) needed! Plus exchangeable bootloader

Usable to construct your own (V-)USB devices like keyboards, mouses or your own protocols.

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Revision 4 SMT

Revision 4 SMT (latest)

Revision 4 is 100% compatible to its predecessor revision 3. You CAN use revision 3 firm-/software.
However, the schematic has been pimped (even they are mostly identical).
The new schematic also is available in PDF or EAGLE (tinyusbboard.sch, tinyusbboard.brd) formats.

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Revision 3 THT

Revision 3 THT

TinyUSBboard is an Arduino compatible, minimalistic and cheap AVR microprocessor board with USB interface and simple "do it yourself" capability.
All its components you need to construct it are universal and available nearly everywhere - no special PCB needed. Also available as a DIY kit!

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Bootloader and Firmwares

Althought tinyUSBboard has a variaty of different (and exchangeable) bootloaders, its default one is USBaspLoader.
In normal mode the bootloader simply starts up the firmware, the user programmed into the AVR last time using the program-mode

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