Ok so the board - OpenPilot Freedom - is finishing, pending final approval from a few people. There were a few hold out connections that took some effort to route but nothing near any critical paths so I feel pretty good about it. In the end the ground plane is completely uninterrupted and not used for any routing which was one of my main goals.
A few features:
- 12 general purpose PWM pins (in or out), many of which also have ADC functionality. Four are on a traditional servo header (for BEC and gimbal) and 8 are on a single row right angle header.
- CAN transceiver for electrically robust add-ons, such as digitally connected ESCs
- JST input pin capable of PPM, Spektrum and S.Bus
- Two serial ports, one of which supports I2C
- Reverse polarity protection on servo pins and serial inputs
- Efficient switching supply provides operation from 3-17V
- EMI filtering between radio and MCU
- Built in radio (RFM22b) with a U.Fl. header to provide a low profile fit (without the servo header FC height is < 0.25")
- Runs OpenPilot software
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| Top side |
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| Bottom side |
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| Top routing layer |
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