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You can assign a joystick button to the pitch sync (PTCH) control. When pressed, this button will make the autopilot match its settings to whatever you are doing as you fly the plane. Then, when you release the pitch-sync joystick button, the autopilot servos will take hold of the yoke and maintain the vertical speed, altitude, airspeed, or pitch that you were just flying.

From simply sweeping an object back and forth to adding steering to your robot or R/C car, hobby servos are a great way to add some motion to your next project. Servos allow you to easily control the speed, direction and position [1] of the output shaft with just three wires!

A continuous rotation servo (sometimes referred to as a full rotation or just 360 servo) behaves more like a standard DC motor. Instead of controlling the position of the servo, the controller sets the speed and direction of the motor. Continuous rotation servos work well as drive motors or other applications where you need to control the speed and direction of a motor with just a few wires.

With everything soldered to your Servo Trigger and your button and servo connected (assuming you have not done so already), connect your power supply, and press the button. You should see your servo sweep from one side to the other. Try adjusting the three potentiometers on your Servo Trigger to switch the direction, movement arc, and movement time for your servo.

This may be caused by the potentiometers set beyond the servo's pulse range or possibly by having the button wired backward. Try adjusting the "A" and "B" potentiometers to fix erratic movement. If your servo is moving immediately when power is applied and then reacting unexpectedly to your button press, you may have one of your wires for the button connected incorrectly. Check to make sure you have the IN pin tied to the NO connector and the GND pin tied to the COM connector on your button.

To follow along with this example, you will need the materials listed below. Depending on what parts you already have or if you would like to use another development board or servo, you may want to adjust the items in your cart.

Though setting this circuit up is very simple since we are just using three pins on our RedBoard Qwiic, note that the Servo's power pin is connected to VIN and not 5V. The 5V pin can only source up to 250mA which is not enough to drive most servos, so we use the VIN pin instead.

If your servo is jittery or seems like it is locking up, you may be driving it beyond the servo's pulse range. Check your servo's datasheet and adjust the second and third values in the servo.attach(9, 1000, 2000); function in the setup.

To follow along with this example, you will need the following materials. Depending on what parts you already have, or if you would like to use a different Raspberry Pi or servo, you can adjust your cart accordingly.

Next, connect your servo to one of the 3-pin channel headers taking care to match the pins on the servo with the silkscreen labels on the Servo pHAT. The example we are using defaults to Channel 0 so, if you use a different channel, make sure to adjust the code accordingly. Do not connect servos to the Pi while it is powered on as the resulting current spike can cause the Raspberry Pi to reset.

If you have a particularly large servo, or many servos driving a heavy load, you might notice the Pi rebooting or browning out when using the USB port on the Pi to power both the Pi and the Servo pHAT. You can try switching to powering the Pi and Servo pHAT directly through the USB-C connector on the pHAT, but a better solution is to sever the Power Isolation jumper and power each device individually. We cover where to locate that jumper and how to modify it in the "Jumpers" subsection of the Hardware Overview section of the Servo pHAT Hookup Guide.

Controlling servos in loops can be good for projects where you just want something moving while powered but what if you want more of a direct ability to control you


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