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FCSwitch4
The AT FCSwitch4 is a device that provides an ultimate level of safety to the operation of quadcopters, allowing redundancy in the most critical component: the Flight Controller.
The AT FCSwitch4 is a device that provides an ultimate level of safety to the operation of quadcopters, allowing redundancy in the most critical component: the Flight Controller.
The FCSwitch4 switches the motor outputs from two redundant Flight Controllers in a soft and controllable way. By using a PWM signal from any free RC channel, the pilot can at any time switch between two Flight Controllers. The proprietary algorithm allows for a smooth and safe transition, while responding to pilot inputs at any time.
As the FCSwitch4 is totally independent from the two Flight Controllers, it’s not affected by firmware errors, GPS locks or sensors malfunction. In case of fly-away or any odd behavior from the active Flight Controller, the pilot switches to the second Flight Controller, recovering immediately the control of the quadcopter. |
Dimensions: 53 x 21 x 17 mm (LxWxH)
Weight: 13 grams (25 grams with supplied cables)
Power: +5V.
The ATFCS4 is powered at 5V through a servo connector at the POWER input, using the standard servo polarity (middle pin +5V, bottom pin GROUND). |
The four motor outputs from Flight Controller 1 are connected (only the PWM signal pins) to the bottom line of the inputs connector, as shown in the diagram.
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The four motor outputs from Flight Controller 2 are connected (only the PWM signal pins) to the top line of the inputs connector, as shown in the diagram. |
In order to select which Flight Controller is active, we must connect the CONTROL input to any spare cannel of the RC receiver (no need to connect the power, only PWM signal and ground are needed). When the PWM signal received has a pulse length shorter tan 1600us, Flight Controller 1 is active. When the PWM signal is longer than 1600us, Flight Controller 2 is active. |
The output PWM motor signals, are connected to the four ESCs as shown in the diagram. Depending on the Flight Controller used, the numbering of the motors could not match the FC1/2 inputs, but each ESC output will be connected to the corresponding number of FC1 or FC2 input. That means that if Motor 1 from the Flight Controller 1 output is connected for example to FC1/M4, then the ESC corresponding to Motor 1 must be connected to ESC/M4. |
IMPORTANT |
The central pins of the ESC outputs are connected to the internal +5V power bus. If the ESCs supply power through their central wire, this wire must be cut in order to avoid shortening the +5V power supplied to the ATFCS4 to the internal ESC power supply. If the ESCs used need to be powered externally (typically Opto ESCs), then the central wire must be connected.
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The ATFCS4 includes 4 LEDs, with the following assignment: