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Key features
- Standard current consumption: 1 mA
- Standby current consumption: 1 μA
- Logic voltage level: 5V
- Operating voltage: 1.8V to 5.5V
- Communication: I2C (address: 0x27)
- Connectors: easyC x2
- Mounting holes: 2
- Dimensions: 38 x 22 mm / 1.5" x 0.9"
Product features
Complimentary technical support
In case you ever get stuck with using this product, you can count on us. We provide free, no-strings-attached technical support with this product. Just reach out to us with your questions, and we’ll be there to help you.
easyC
easyC is a system for simple connection of microcontroller boards, sensors and actuators that enables fast prototyping without the possibility of error. The connection between the modules takes place with simple cables. easyC is based on I2C communication.
Made in EU
This board was developed and manufactured in European Union (Osijek, Croatia).
Open-source
We can proudly say that this product is fully open-source. Its hardware design (schematics, BOM, board design) is available on our GitHub (links below in the “Useful links & materials” section), and GitHub repositories for software files (if product comes with software) can be found in the same section below.
Product Description
Are you short on IO pins? Looking to increase the number of them? That’s what the GPIO Expander MCP23017 is for! It uses I2C communication to do so. With just two wires, 16 new fully configurable digital IO pins are added to a microcontroller.
Due to the jumpers on the board, the I2C address of a device can be changed. Thus, eight breakout boards can be connected to a microcontroller. All of the pins on the expander board have pull-out resistors that can be turned on and off.
Product usage tips:
If the breakout board is not working, most commonly something is not connected correctly. Check the pinout and wiring. You’ll likely find the problem there. Check if the SDA and SCL lines are connected correctly from the board to the microcontroller. Make sure the I2C address of the expander is correct – it should be 0x27.
The board comes with two easyC connectors for easier connection with other I2C devices. Because of this, it works perfectly with any Dasduino board and I2C breakout boards. It has two mounting holes so it won’t move an inch once mounted somewhere.
Useful links & tutorials
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