If you’re interested in flying drones, or even if you aren’t, you might have heard the term ESC Drone (Electronic Speed Controller Drone) or have asked around about it without knowing exactly what it does. If that’s you, then it’s time to read this article and find out.

What is ESC Drone? ESC stands for Electronic Speed Controller. It’s a device that manages the amount of power going to the motors in your drone. It also helps regulate how fast or slow those motors spin, allowing you to control the speed and direction of your drone.

If you’re flying a drone or electric RC plane or helicopter, you’re going to want to learn about the ESC. This is a part that is found in almost all models. The article will explain what an ESC is, how it works, how to be sure if you need one, and how to choose a good ESC for your needs.

Choosing an ESC for your drone can be a daunting task, especially if you’re new to the world of drones. There are so many options out there and each ESC has different features and advantages that it can be hard to know what you should be looking for.

In this article, we will go over some of the most important factors to consider when choosing an ESC for your drone.

Working Of Esc In A Drone

Working Of Esc In A Drone

The ESC (electronic speed controller) is the component that regulates power to the motors and propellers. It uses sensors to monitor how fast your drone is moving, and how much throttle you are using. The ESC then adjusts the power accordingly, so that your drone flies at an appropriate speed.

The electronic speed controller (ESC) is the brain of your drone. It controls the connection between the power source and the motors, which is what makes your drone fly.

The ESC receives instructions from a flight controller (FC) or radio transmitter in order to direct power to each motor. The ESC receives these instructions using a signal called PWM (pulse-width modulation), which sends signals that correspond to how much power should flow through each motor. 

The more power you want to send to a particular motor, the wider you open its throttle and the more voltage it gets, while less power means closing its throttle until it stops receiving voltage altogether.

Each ESC has its own configuration settings that allow you to change how fast or slow the motors spin in relation to one another, as well as whether they spin in opposite directions or not (as with counter-rotating props).

Regulates The Speed Of Motors

The electronic speed controller (ESC) is a small device that regulates the speed of the drone’s motors. It works by using a combination of electronic and mechanical components to control the rotation of each motor.

The ESC uses a set of sensors to measure the voltage and current draw from each motor, along with a microprocessor to determine how much power should be supplied to each motor at any given time. 

This means that the ESC can monitor not only how fast your drone is flying but also how much power is being used by each motor while it’s in flight.

Provide Control Over How Fast Your Drone Moves

The ESC is what controls how fast your drone moves, which is why it has been nicknamed “the brain” of your drone. It’s also what tells the motors on your drone how fast to spin, which determines how quickly and efficiently that drone can move.

The ESC does this by measuring the speed of rotation of the propellers and adjusting their power to keep them at a steady speed.

Allows To Control The Direction

The ESC also allows you to control the direction of your drone by sending signals from the controller telling it which way to go.

You can think of it as a little brain for your drone: It decides what direction to move in, and then tells its arms (the motors) how fast or slow they should go so that they follow through on that decision.

Parameters Of Esc In A Drone

The ESCs are made up of a circuit board, which contains a chip that controls the speed and direction of the drone. There is also an electronic fuse on this circuit board, which will shut off power to the motors in case of an accident or damage to the drone.

The ESC is a vital part of your drone’s power system. It regulates the voltage and current of the battery to keep your drone under control and stable during flight.

There are several things you need to know about ESCs:

8-bit Vs. 32-bit

The main difference between 8-bit and 32-bit ESC’s is that the latter can handle more calculations per second and have a higher resolution.

8-bit processors have less precision than 32-bit processors, and thus may experience more error when processing signals. In the case of ESCs, this can mean a greater chance of noise interference and a less precise reading of the throttle signal.

The more bits an ESC has, the more information it can handle. This means that an 8-bit ESC can control up to 256 different speeds, while a 32-bit ESC can control up to 16,384 different speeds.

Sine-waves Vs. Square-waves

The two primary types of ESCs are sine-wave and square-wave.

  • Sine-wave ESCs are often used in drones because they help reduce noise and interference, which is important when you’re flying near other drones or people. The downside is that they can be more expensive, so you’ll see them in higher-end models.
  • Square-wave ESCs are less expensive but also less sensitive to interference, so they’re great for beginners who want a reliable product without having to pay top dollar for it.

Voltage Rating

Voltage rating of a drone battery is the maximum voltage that the battery can handle. The higher the voltage, the more energy that can be stored in a battery. This means that a drone with a higher voltage rating will be able to fly for longer at higher speeds and heights.

The type of battery you use will depend on how much power you need to run your drone and how long you want it to last. The more powerful a battery is, the more expensive it will be, so keep that in mind when choosing a battery for your drone.

Amperage Rating

The amperage rating of ESCs is the amount of current that they can handle. You should always make sure that the amperage rating of your ESC matches the motors you are using. If you have a high-power motor and a low-power ESC, it will burn out quickly.

Some ESCs also have temperature sensors that monitor how hot they get and adjust to prevent overheating. This can be useful for preventing damage if your drone crashes into something sharp or if it flies too close to an object with high thermal conductivity.

Motors Control

The difference between an individual ESC and a 4-in-1 ESC is the number of motors that each unit can control. The individual ESC only controls one motor, while the 4-in-1 ESC controls up to four motors at once.

If you’re flying a quadcopter, then you will want to use an individual ESC because they are more powerful than 4-in-1 ESCs. On the other hand, if you are flying a hexacopter or octocopter then using a 4-in-1 ESC will give you better performance because it can handle more power.

Factors To Consider When Choosing Esc For Drone

Factors To Consider When Choosing Esc For Drone

You need to consider the size of the ESC because you want to make sure it will fit in your drone. The voltage is important because it’s how much power your ESC can handle. And the amperage is important because it’s how much power your ESC will give.

When you are picking an ESC for your drone, you need to take some factors into consideration. Here are a few tips to get you started:

Current Rating

The current rating measures how much current the ESC can handle, and it’s important to make sure that your drone can handle the same amount of current that your ESC can. Otherwise, you could end up with damage to either or both of them.

When choosing a new ESC, be sure to choose one with a rating that is at least as high as what your drone requires.

Continuous Vs Burst Current Rating

The continuous current rating is the maximum amount of current that can be drawn from the ESC at any given time without damaging the component. It’s important because it defines how much juice you can draw from your battery at any one time. 

The burst current rating is how much current can be drawn from a component in a short amount of time before it overheats and fails.

Input Voltage Rating

The voltage rating of an ESC determines the maximum voltage that it can handle. This is particularly important because if you use a power source with a higher voltage than what your ESC can handle, it can lead to damage or even an explosion. 

If you want to use your drone in different environments, it’s best to choose an ESC with a high input voltage rating so that you’ll be able to fly in any environment. This will also prevent damage to the ESC if your drone is flown with a battery that has lower voltage than it was designed for.

Weight And Size

Weight and size are two factors to consider when choosing an ESC for your drone. The weight of the ESC is important because it can affect the flight time of your drone. 

The size of the ESC is important because it determines how much space you have left in your drone to install other components, such as motors and servo.

You’ll need to decide which size is best for you based on what kind of drone you’re using. If you’re flying a small indoor drone or one that’s made out of lightweight materials like carbon fiber or plastic, then a smaller ESC might be best because it won’t add too much extra weight to the drone. 

However, if you want to fly outdoors with a larger drone that’s made out of heavier materials like steel or aluminum, then you’ll probably want an ESC that’s larger and more powerful so it can handle the extra weight without overheating or burning out prematurely.

ESC Firmware

The ESC firmware is a crucial part of your drone’s operation. It has a huge impact on its performance and safety, so you’ll want to make sure you choose one with the best possible firmware for your needs.

The most important thing to look for in ESC firmware is how often it updates itself. The more often it updates, the better, because that means it’s more likely to have been tested against the latest version of software used by other drone companies like DJI and GoPro.

Following is the list of common types of ESC firmwares:


BLHeli ESCs are some of the best ESCs on the market because they offer great performance, smooth response, and good reliability. If you’re looking for an ESC that will make your drone perform better, go with a BLHeli.

The BLHeli firmware is a bit of a special case when it comes to choosing an ESC. It’s not necessarily the best option for everyone, but it can be an excellent choice if you’re looking for something that’s more powerful than the stock ESCs that come with your drone.

The reason why BLHeli is so powerful is because it has a much higher refresh rate than most other ESCs. This means that your drone will be able to make adjustments to its flight path much more quickly and accurately.


Simonk is an open-source firmware for ESCs that has been around for a long time. It’s known for being reliable, although it tends to be a little bit slower than other options. It’s also very easy to use and can be used on any ESC that supports it.

Simonk ESC firmware is considered one of the best in the world, and it’s used by many drone enthusiasts. This firmware is especially popular with people who fly their drones at high speeds, because it provides precise control over your drone.

The Simonk firmware has been around for a long time, and it has developed a reputation for being able to handle high-speed flying very well. The Simonk ESC firmware also comes with its own set of instructions that you should read before installing it on your drone.


The Blheli_s Esc Firmware has several features that make it a great choice for your drone, including:

  • It has an improved signal processing algorithm that gives better throttle resolution and control. This means that the motor acceleration will be smoother and more responsive.
  • The firmware also allows for faster reset time between motor commands. This allows you to change modes or adjust settings without having to wait for your ESC to catch up.
  • It features high voltage burst technology that allows you to run at higher voltages without damaging the ESCs or motors.

Kiss ESC

KISS Esc Firmware is known for its reliability and durability. It’s also known for being easy to use, and we mean really easy. 

With this firmware, there’s no need to worry about what settings you need to change or how much time it takes to do so. Just plug in your ESC and go! The firmware will automatically detect your drone type and adjust accordingly.

If you’re new to drones or just want something that works without any hassle, KISS Esc Firmware is definitely worth checking out.


The Blheli_32 is a 32-bit ESC firmware that has been developed by the BLHeli team. It is a microprocessor based solution for controlling brushless motors, with the aim of providing a more efficient and reliable motor control system.

It has many benefits, such as its ability to be programmed using the USB port, which makes it easy to use. The firmware can also be updated easily, which means it can be updated with new features and functions whenever possible. 

This makes it possible for the user to enjoy all of the benefits that come with using this type of software without having to worry about any issues or problems as they might occur.


When choosing an ESC for your drone, you should consider the thrust. If you are looking to fly your drone in a wide open space, then you will want to get an ESC that is capable of producing high amounts of thrust. 

The higher the thrust rating on your ESC, the faster your drone will be able to go and still stay under control. Thrust is the force that propels your drone forward, and it’s measured in Newtons (N). The higher the thrust rating, the faster your drone will be able to go.

With Or Without Bec (battery Elimination Circuit)

BEC  is a device that can be used to power your drone. It’s usually just a small box that needs to be connected to the battery and then connected to the drone. This eliminates the need for you to use extra batteries, because it will power your drone from one battery instead.

ESCs with BECs are more expensive but they can make up for the price by saving you money in the long run. The reason is that they include a built-in battery eliminator circuit (BEC), which means that they don’t need a separate BEC to power the flight controller and receiver.

ESCs without BECs are less expensive, but they require a separate BEC to power the flight controller and receiver. This can increase your overall setup cost because it requires purchasing another component that could be costly if you don’t already have one on hand.

ESC Protocols

The protocol determines how fast the ESCs can respond to changes in throttle commands from the flight controller, and how many times per second they can change their output power. 

This is important because if your ESCs aren’t responding quickly enough or changing their output power frequently enough, you’ll see a lag in your drone’s responsiveness and performance.

The ESC’s protocol determines how it communicates with other components on your drone and what kinds of instructions it can receive from them. There are many different protocols in use today, but not all protocols are compatible with all drones or their components.

Here is the list of the components used in drones: 

  • Standard PWM
  • Oneshot125
  • Oneshot42
  • Multishot
  • DShot
  • ProShot

How Do I Connect ESC To Drone

The ESC motor is connected to the power distribution board with a four-wire cable. The wires are red, black, yellow and blue. Each wire carries a specific voltage and current signal. Red is +12V, black is ground (GND), yellow is BEC signal and blue is signal for the receiver.

Now that you’ve got everything connected up, take a moment to check over all your wires again before moving on. You don’t want any stray strands floating around where they could cause problems later on.


ESC is a component that connects the drone’s motor to its battery, and it’s responsible for controlling the speed of the motors. An ESC takes a signal from your transmitter (the remote control) and translates it into a voltage that tells the motor how fast to spin. 

The ESC is an essential part of a drone. So you cannot buy a drone without checking out the features and specifications of the ESC. 

Also, if you want to use the same ESC in different drones then also it is important for you to note down the specifications of different ESCs. 

In some cases, you may need to upgrade or downgrade your ESC according to your needs. The reason behind this might be that your drone weighs too much more than other drones of the same type.

Frequently Asked Questions (What Is An Electric Speed Controller Drone?)

Can A Drone Work Without ESC?

No, a drone can’t work without ESC. The ESC or Electronic Speed Controller is the part of the drone that helps it fly. It controls how fast the drone can go and how quickly it turns. Without it, the motors will not be able to move.

What Does An ESC Do?

An ESC (electronic speed controller) is an important component of a drone’s flight system, as it manages the power supplied to all of the motors. ESCs also monitor and control motor rotation, which is critical for ensuring that the drone’s propellers are spinning at the correct speed and direction.

How Many ESC Does A Drone Need?

It depends on the drone. Some have one ESC, others have four. The number of ESCs in a drone will depend on how many motors it has and how many channels they need to control, but most drones with three or more motors will have at least two ESCs.

What Is The Best ESC For Drone?

The best ESC for drones is the one that works best for your needs. You want to look for an ESC that can handle the amount of current your motors draw, and also make sure it has enough channels to control your drone’s flight characteristics (e.g., rate of ascent/descent).

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