TECHNICAL SUPPORT
Published 2026-03-29
Are you also wondering how to make your robot or camera move to achieve precise control of where you point and hit? To put it bluntly, a "neck" or "base" that can rotate flexibly is needed so that theservocan rotate obediently with the sensor or camera. This "neck" is theservogimbal we are going to talk about today. It can help you turn many interesting ideas into reality.
Simply put, a servo gimbal is a small platform that uses a development board to control two or more servos so that they can rotate up, down, left, and right smoothly. You can think of it as an intelligent little head that can not only turn, but also stop at a certain angle accurately. The biggest advantage of learning it is that it can be equipped with "eyes" for your various innovative projects. Whether it is a face tracking camera or a moving head for a robot, you must rely on it to achieve precise positioning.
In fact, many friends will encounter a pain point when doing projects: they want the camera to take a specific angle, or they want the robotic arm to grab something, but ordinary motors cannot achieve precise positioning at all. The servo gimbal just solves this problem. It has built-in position feedback. As long as you send a command, it can stop steadily at 0 degrees, 90 degrees or 180 degrees. This "stop where you point" feature is simply a golden partner for creative realization.
Don’t worry, it’s not complicated at all to prepare. You first need a development board, such as the most common UNO or Nano, they are like the brain of the entire system. Then there is the core component - the steering gear. Generally, two 9g small servos such as SG90 are enough. One is responsible for horizontal rotation (we call it Pan axis) and one is responsible for pitching (called Tilt axis). The cost is very low and you can buy it easily online.
In addition, you also need a gimbal bracket. You can buy a ready-made acrylic kit for a few dollars, and the store will provide screws and nuts. If you like to do things with your hands, you can print one out of Lego or 3D. Finally, there are a few DuPont wires to connect the servo to the servo. In terms of power supply, if it is a small servo, just use the 5V pin to power the servo, which is very convenient to get started.
The connection process is actually as simple as building blocks. First, fix the two servos to the gimbal bracket. Be careful not to install them upside down. The horizontal servos are installed on the base, and the pitch servos are installed on the part that can swing up and down. Then take out your DuPont wire. The servo has three wires: red is the positive pole of the power supply, which is connected to 5V; brown or black is the negative pole, which is connected to GND; orange or yellow is the signal wire, which needs to be connected to the digital pin.
For the convenience of subsequent programming, it is recommended to connect the signal line of the horizontal servo to pin 9 and the signal line of the pitch servo to pin 10. This connection method is very common and can help you debug quickly. After everything is connected, remember to check whether the screws are tightened, especially the rocker arm of the servo. If it is loose, the gimbal will shake when it rotates, affecting the accuracy. After connecting the wires, the hardware part is completed. Is it much simpler than you imagined?
Finally, we have reached the most anticipated part of programming. Don’t be intimidated by the code. The core logic is actually just a few sentences. We need to use the built-in Servo library, which is specially used to control the servo. First introduce it at the beginning of the program, and then create two servo objects, such as called and. In the setup function, use methods to bind these two objects to the pins we just connected.
The key step is in the loop function. You can write some instructions to make the gimbal move automatically. For example, use a for loop to slowly increase the angle of the horizontal servo from 0 to 180, and then decrease it back. The pitch servo can also move in this way at the same time. The effect of writing this way is that the PTZ will scan back and forth around it like it is "patrolling". If you want it to stay at a specific angle, just write .write(90). Once you run this code, you will immediately see that the gimbal stops exactly where you want it.
Just being able to move isn't cool enough. Allowing the gimbal to automatically track the target is the truly advanced gameplay. To achieve this, you need to add a sensor to the gimbal, such as an ultrasonic module or camera. Taking ultrasonic as an example, you can fix the ultrasonic module on the gimbal and let it scan back and forth. If it detects an object in any direction, you can control the gimbal to turn in that direction.
The specific idea is to let the pan/tilt rotate slowly while continuously reading the distance value of the ultrasonic wave. When the detected distance is less than a certain threshold (such as 30 centimeters), it means there is an object ahead. At this time, the current servo angle is recorded and the gimbal is aligned in this direction. This is equivalent to installing "ears" on your gimbal, allowing you to hear the position of surrounding objects. If you use a camera or a Raspberry Pi, you can even achieve face tracking, and the effect will be even cooler.
The most common problem when playing with a servo gimbal is jitter, which usually has several reasons. First check the power supply. If you use the built-in 5V output, driving two servos at the same time may cause insufficient power supply, especially when the servos move at the same time. The solution is also very simple. Use an external 5V power supply to power the servo separately, and just connect the ground wire of the external power supply together. This can solve most jitter problems.
Another common cause is improper delay settings in the code. If you make the servo turn too fast or send commands too frequently, the servo will not be able to react and will vibrate. The solution is to add a little delay to give the servo time to move into place. There is also the problem of physical structure. Check whether the rocker arm and bracket of the servo are loose. Sometimes, use some hot melt glue to fix it, and the effect will be immediate. Starting from these small details, your gimbal will soon be as stable as a rock.
Seeing this, are you already itchy and want to try something right away? In your creative projects, what interesting functions do you most want the servo gimbal to help you achieve? Welcome to leave a message in the comment area to share your thoughts, and don’t forget to share this introductory guide with friends around you who are interested in robot control. Let’s work together to turn fun ideas into reality!
Update Time：2026-03-29
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