Multiple Kickstarter project creator Doug Gilliland has now launched his 17th project via the crowdfunding website, offering a Raspberry Pi I2C Multiplexer for the small single board PC.
The new piece of hardware for the Raspberry Pi computer is now available to back with pledges starting from just $25, offering a tested four-port I2C hub for the Raspberry Pi. This innovative device is designed to expand the capabilities of the Raspberry Pi by allowing multiple I2C devices to be connected and managed efficiently.
Key Features and Benefits
The Raspberry Pi I2C Multiplexer comes packed with a variety of features that make it a versatile and valuable addition to any Raspberry Pi setup. Some of the key features include:
- I2C Hub / Repeater / Replicator / Multiplexer / De-multiplexer
- PCA9544A IC
- Controlled via I2C
- Multiple part vendors
- Devices with the same address can be attached to different ports
- Host I2 port goes to Raspberry Pi I2C lines
- 3.3V host operation
- Four I2C slave ports
- I2C ports can use the Raspberry Pi or have their own power (power source select jumper)
- A Raspberry Pi which runs 3.3V can control an I2C device which runs at 5V
- Voltage translation between the ports
- I2C ports can be 3.3V or 5V
- Fits in any Raspberry Pi model
- Cutout for Model B RCA video jack
- Interrupt controller on each channel and host 100KHz/400KHz operation
- On-board termination resistors
Practical Applications and Use Cases
The Raspberry Pi I2C Multiplexer is particularly useful in scenarios where multiple I2C devices need to be connected to a single Raspberry Pi. For example, in a home automation system, various sensors such as temperature, humidity, and light sensors can be connected to the Raspberry Pi using this multiplexer. This allows for more complex and integrated systems without the need for multiple Raspberry Pi units.
Another practical application is in educational settings. The multiplexer can be used in classrooms to teach students about I2C communication and how to manage multiple devices on a single bus. This hands-on experience can be invaluable for students learning about electronics and computer science.
Moreover, hobbyists and makers can benefit from the multiplexer when working on projects that require multiple I2C devices. For instance, a weather station project might need several sensors to monitor different environmental parameters. The multiplexer simplifies the wiring and management of these sensors, making the project more manageable and scalable.
The inclusion of the PCA9544A IC ensures reliable performance and compatibility with a wide range of I2C devices. The ability to control the multiplexer via I2C adds to its flexibility, allowing for easy integration into existing projects. Additionally, the voltage translation feature is particularly useful when working with devices that operate at different voltage levels, ensuring that the Raspberry Pi can communicate with both 3.3V and 5V devices seamlessly.
Overall, the Raspberry Pi I2C Multiplexer is a valuable tool for anyone looking to expand the capabilities of their Raspberry Pi. Whether you’re a hobbyist, educator, or professional, this multiplexer offers a simple and effective solution for managing multiple I2C devices. With its affordable price point and robust feature set, it’s a worthwhile investment for any Raspberry Pi enthusiast.
Source: Kickstarter
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