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Failsafe

Failsafe datasheet here: fd_datasheet.pdf

Failsafe integration guide here: fd_integration.pdf

Screenshot of the Failsafe programmer

Comment by Ios on August 30, 2009 at 22:27


I’m pleased to report that Millswood Engineering have delivered their first Failsafe Device, and are now available for sale. The failsafe device was developed to conform to the requirements of the 2009 UAV Outback Challenge, but is also capable of being used as a flight termination system, gimbal (pan/tilt/zoom) control mechanism, payload control device, autopilot communications interface, remote control of vehicle through telemetry and more. Some of these capabilities will be progressively showcased in the coming weeks.

The Failsafe Device gathers together all of those annoying electronic bits and pieces that infest UAVs, and integrates them into a single unit. Things like RS232 level converters, radio modem carrier boards, receiver/autopilot multiplexers, battery eliminator circuits, serial servo controllers, and redundant power supply switches. All of these functions have been integrated onto a single PCB that plugs directly into a Digi XTend OEM RF Module.

Here's a quick feature summary:

-Provides mechanical mounting for the Digi XTend radio modem.
-Provides full-duplex RS232 access to both autopilot and radio modem.
-High efficiency 2A switching power supply.
-In conjunction with a ServoStation, provides a fully redundant power system for telemetry radio, autopilot, RC receiver and servos.
-Delayed power to the radio modem on power-up allows autopilot to initialise without RF interference.
-Allows RC control to override failsafe activation.
-Fully programmable failsafe operation (on/off, timeout period, heartbeat string).
-Activation of failsafe can be reported on telemetry downlink with a user programmable message string.
-8 channel serial servo controller built-in, with precision 12-bit hardware PWM generation.
-PWM channel switching performed in hardware by a programmable logic device, giving consistent low-latency signal path delays.
-Both Mini SSC II and Pololu commands supported natively. No need to set any jumpers or cycle the power.


More details can be found here; http://www.millswoodeng.com.au/failsafe_device.html

A detailed manual can be found here; http://www.millswoodeng.com.au/documents/fd_datasheet.pdf

I'll be publishing photos and video in the near future.

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