A simple all-in-one board that runs the show for your Printrbot, RepRap 3D printer

a simple all-in-one board that runs the show for your Printrbot, RepRap

Printrboard is a derivative of Teensylu, originally based on Sanguinololu. It uses the same Atmel AT90USB1286 MCU as Teensylu, but integrates the stepper drivers, thus eliminating the need for separate Pololu boards. Like the Teensylu, the AT90USB has on-chip USB, removing the need for the FTDI USB UART. And like the Sanguinololu and the Teensylu, Printrboard also has expansion headers supporting I2C, SPI, UART, and ADC pins. All extra I/O ports of the AT90USB have been broken out to headers for prototyping and expansion.

Understanding RC propeller size

Understanding RC propeller size

You can see that the higher pitch prop (eg 10×8) takes only one and a half turns to cover the same distance that the lower pitch prop (eg 10×4) takes 3 turns to. So, with both engines and props spinning at identical RPM, the higher pitch prop will travel further in the same amount of time – hence a faster flying plane.

OpenPilot is a next-generation Open Source UAV autopilot

OpenPilot is a next-generation Open Source UAV autopilot

OpenPilot was started at the beginning of 2010 and is a serious use platform aimed at civilian and research purposes, a emphasis has been placed on making the platform especially suitable for aerial photography and aerial video applications.

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