How Do Dash Cams Work?

Dash cams have become an indispensable tool for many drivers, offering enhanced security and peace of mind on the road. Before diving into the mechanics of how dash cams operate, it’s important to understand why having one is so advantageous.

There are many benefits of dash cams that make them well worth the investment, including:

• You can capture unexpected events.
• You have irrefutable evidence in case of accidents.
• Dash cams can record scenic drives while you make memories.

But that’s not all. If you’re wondering, do dash cams lower insurance premiums? The answer is, yes, further adding to their numerous benefits.

In this guide, we’ll explain how do dash cams work and examine the key components that make them so effective.

 

Components of a Dash Cam

Before we explain how do dash cameras work, you need to know the key components of a dash cam. This will also help you make an informed decision when you purchase one. Each part is crucial to its operation to ensure it captures high-quality footage whenever you need it.

Camera Lens

The camera lens is the most vital component of a dash cam. It is responsible for capturing video footage of the road ahead—or behind, depending on the model.

Dash cams typically feature wide-angle lenses to provide a broad view of the surroundings. This is essential to capture comprehensive footage in the event of an incident. The quality of the lens, such as its resolution (e.g., 1080p, 4K), directly impacts the clarity of the video, especially in low-light conditions.

G-sensor

The G-sensor, or accelerometer, is a crucial safety feature in dash cams. It detects sudden changes in motion, such as sharp braking or a collision. This is what automatically triggers the dash cam to save and lock the current video file.

 

This function ensures that vital footage is preserved and not overwritten during loop recording. A reliable G-sensor is essential for capturing the most critical moments on the road. It provides invaluable evidence in the event of an accident.

Processor

The processor acts as the brain of the dash cam. It handles all data processing tasks, including video compression and managing various features.

 

A powerful processor ensures the dash cam operates smoothly and efficiently, providing high-quality recordings without lag or delay. It also enables the dash cam to multitask effectively. This includes recording, while using GPS tracking or connecting to WiFi.

Storage

Storage is where the dash cam saves all recorded footage. Most dash cams use microSD cards, available in various capacities ranging from 16GB to 128GB or more. The size of the storage card determines how much footage can be stored before the dash cam starts overwriting older files.

 

Larger storage capacities are ideal for longer trips or when recording at higher resolutions. Some dash cams also feature loop recording. This automatically replaces the oldest footage with new recordings once the storage is full to ensure continuous operation without manual intervention.

Power Supply

Dash cams are typically powered by the car’s electrical system. This is either through the 12V power outlet (cigarette lighter socket) or directly wired to the vehicle’s fuse box.

 

Some models come with built-in batteries, which allows them to continue recording for a short period even when the car is off. This is useful for parking mode.

Mounting Hardware

Mounting hardware is used to secure the dash cam to the vehicle, typically on the windscreen or dashboard. The placement and stability of the dash cam are vital if you want to capture clear, steady footage.

Common mounting options include suction cups and adhesive mounts.

• Suction cups are easy to install and adjust.
• Adhesive mounts offer a more permanent and stable solution.

Display Screen

Some dash cams are equipped with a built-in display screen. This allows users to view footage directly on the screen, adjust settings, and align the camera angle conveniently. Display screens range from basic LCDs to full-colour touchscreens.

Advanced Dash Cam Features

Modern dash cams like the Nextbase 380GWX come with advanced features designed to enhance functionality and user experience. These advanced features can significantly increase how much value you get from your dash cam.

These features include:

• GPS tracking, which logs the vehicle’s speed and location.
• WiFi connectivity for easy file transfer to smartphones or computers.
• Parking mode for continuous monitoring while the vehicle is parked.
• Wide viewing angle of 140 for extra visibility.
• Ample storage space for peace of mind on long trips.
• Full HD resolution for crystal clarity.

How Do Dash Cameras Work?

Dash cams are designed to continuously record video footage while the vehicle is in operation. Understanding the basics of how these devices function can help you get the most out of them.

Recording

When powered on, a dash cam automatically begins recording. It captures video in short segments, typically between one to five minutes long. This ensures that, if one file becomes corrupted, the remaining footage remains intact.

Most dash cams feature loop recording. This is where new footage overwrites the oldest footage when the storage is full. A dash cam with reliable loop recording is essential if you always want the latest footage.

Playback and Retrieval

Recorded footage is stored on a microSD card, which can be easily removed and inserted into a computer for playback. Some dash cams also offer WiFi connectivity. This allows you to view and download footage directly to your smartphones via a dedicated app.

Do Dash Cameras Record All the Time?

Most dash cameras don’t record when the car ignition is turned off. However, some models, like the Nextbase 380GWX, offer parking mode. This allows them to record when your car is off, triggered by motion or impact. You can review footage anytime, ensuring you don’t miss important moments on the road or while parked.

How Long Does a Dash Cam Record?

The recording duration of a dash cam is influenced by the storage capacity, the video resolution, and whether loop recording is enabled. For example, a 32GB microSD card can store several hours of footage at 1080p resolution. When the storage becomes full, a dash cam with loop recording will overwrite the oldest footage with new recordings.

FAQs

Does the dash cam record audio inside the car?

Yes, many dash cams are equipped with built-in microphones that can record audio inside the vehicle. This feature can be useful if you want to record conversations or any audible events that take place within the car.

How do you know if a dash cam is recording?

Most dash cams have an LED light or a display screen that shows the recording status. A steady or blinking light usually means that the dash cam is actively recording. Some dash cams also provide audible alerts when they start or stop recording, so that the driver is aware of the camera’s status.

Does a dash cam need WiFi?

No, a dash cam does not need WiFi to work, as it primarily records video footage to its internal storage. However, WiFi-enabled dash cams offer added convenience by allowing users to transfer footage to their smartphones or computers without physically removing the storage card. WiFi also gives you easy, remote access to the dash cam’s settings and recorded footage.

Will a dash cam drain my battery?

If a dash cam is hardwired to a vehicle’s electrical system, it could potentially drain the battery if it continues to operate when the car is off. However, many dash cams come with a parking mode that uses low power and includes a voltage cutoff to prevent battery drainage.

Can I see my dash cam from my phone?

Yes. If your dash cam is equipped with WiFi or Bluetooth connectivity, you can connect it to your smartphone via a dedicated app. This connection allows you to view live footage, download recorded videos, and adjust settings directly from your phone.

Do dash cameras work when the car is off?

Many dash cams offer a parking mode feature that allows them to continue monitoring the surroundings even when the vehicle is off. This mode is typically activated by the G-sensor, which detects vibrations or impacts, such as those caused by a hit-and-run or vandalism. While in parking mode, the dash cam operates on a low-power setting, and recordings are usually only triggered by motion or impact.