Single Board Computer vs. System on Module

Attribute	Single Board Computer	System on Module
Size	Usually larger	Smaller and more compact
Functionality	Stand-alone computer	Designed to be integrated into a larger system
Connectivity	May have more ports and connectors	May have fewer ports and connectors
Customization	Less customizable	More customizable
Cost	Generally more expensive	Generally less expensive

Introduction

Single Board Computers (SBCs) and System on Modules (SoMs) are both popular choices for embedded computing applications. While they serve similar purposes, there are key differences between the two that make each suitable for different use cases. In this article, we will compare the attributes of SBCs and SoMs to help you understand which option may be best for your project.

Form Factor

One of the main differences between SBCs and SoMs is their form factor. SBCs are standalone boards that include all the necessary components for a computer system, such as the processor, memory, storage, and I/O interfaces. On the other hand, SoMs are smaller modules that typically contain just the core components, with additional peripherals and connectors added on a carrier board. This difference in form factor can impact the size and flexibility of the final embedded system.

Customization

When it comes to customization, SoMs have an advantage over SBCs. Since SoMs are designed to be used with carrier boards, developers have the flexibility to create custom carrier boards that meet their specific requirements. This allows for greater customization and optimization of the system for a particular application. On the other hand, SBCs are more limited in terms of customization, as they come with a fixed set of components and interfaces.

Scalability

Scalability is another important factor to consider when choosing between an SBC and SoM. SoMs are often more scalable than SBCs, as they can be easily swapped out for newer or more powerful modules without having to redesign the entire system. This makes SoMs a good choice for applications that require frequent upgrades or changes in performance. SBCs, on the other hand, may be limited in terms of scalability, as upgrading the system often involves replacing the entire board.

Cost

Cost is a significant consideration when selecting between an SBC and SoM. In general, SBCs tend to be more cost-effective than SoMs, as they include all the necessary components on a single board. This can make SBCs a more budget-friendly option for projects with limited resources. On the other hand, SoMs may be more expensive upfront due to the need for a separate carrier board, but they can offer long-term cost savings through easier upgrades and replacements.

Power Consumption

Power consumption is a critical factor in many embedded applications, especially those that are battery-powered or require low energy consumption. SoMs typically have lower power consumption than SBCs, as they are designed to be more energy-efficient and optimized for specific tasks. This can make SoMs a better choice for applications where power efficiency is a priority. On the other hand, SBCs may consume more power due to the inclusion of additional components on the board.

Development Time

Development time is another consideration when choosing between an SBC and SoM. SoMs can help reduce development time by providing a pre-designed module that can be easily integrated into a custom carrier board. This can speed up the prototyping and production process, making SoMs a good choice for projects with tight deadlines. SBCs, on the other hand, may require more time for development and testing, as they come with all the components integrated on a single board.

Conclusion

In conclusion, both Single Board Computers and System on Modules have their own set of advantages and disadvantages. SBCs are more cost-effective and easier to work with for simple projects, while SoMs offer greater customization and scalability for more complex applications. When choosing between an SBC and SoM, it is important to consider factors such as form factor, customization, scalability, cost, power consumption, and development time to determine which option best suits your project requirements.