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Gravity - CH423 I2C 24 Digital IO Expansion Module - DFRobot DFR0979
The CH423 pin expander from DFRobot allows you to expand the system by up to 24 additional digital I/O ports via the I2C interface. Among them, there are 8 GPIOs with interrupt functions and 16 GPIOs. The module is equipped with a Gravity connector and standard goldpin pins with a pitch of 2.54 mm. The supply voltage is in the range of 3.3 V to 5 V.
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Product description: Gravity - expander CH423 I2C - 24 I/O - DFRobot DFR0979
The CH423 pin expander from DFRobot allows you to expand the system by up to 24 additional digital I/O ports via the I2C interface. Among them, there are 8 GPIOs with interrupt functions and 16 GPIOs. The module is equipped with a Gravity connector and standard goldpin pins with a pitch of 2.54 mm. The supply voltage ranges from 3.3 V to 5 V. It is used in applications related to LED lighting or matrix displays. It is also used as an element extending applications with light points of any projects.
Arduino compatible product
The manufacturer has prepared a detailed user guide and library for Arduino users.
Gravity - expander CH423 I2C - 24 I/O - DFRobot DFR0979.
Botland is an official distributor of DFRobot open-source hardware. Every roboticist and practitioner of emerging technology has heard at least once of DFRobot solutions, built above all around Arduino. Our range holds original DFRobot products only.
Connection diagram of the module with the DFRobot Expansion Shield board .
Pinout description and connection diagram
The module has a Gravity connector, which should be used to connect it to the Arduino board. Each lead has been additionally described, which significantly facilitates connection.
- "+" - VCC - power pin in the range from 3.3 V to 5 V DC
- "-" - GND - system ground
- "C" - SCL - clock line of the I2C interface
- "D" - SDA - I2C interface data line
- GPIO - input / output pins
- GPO - output pins
You will also find sample program code in the user's guide .
Module technical specification
- Type: lead expander
- Built-in chip: CH423
- Number of pins: 24 I/O
- 8 GPIOs with interrupt functions
- 16 GPOs
- Communication interface: I2C bus
- Interface address: configurable from 0x20 to 0x3F (the module cannot be used with other I2C devices in the address range)
- Supply voltage: 3.3 V to 5 V
- Current consumption: 1mA
- I/O current capacity: 15mA
- Operating temperature range: -20°C to 80°C
- Board dimensions: 45 x 37 mm
Kit contents
- Gravity - CH423 I2C pin expander - 24 I/O - DFRobot
- Connection cable with Gravity 4-pin connector - 1 piece
Components included in the set.
Useful links
| Name | Value |
|---|---|
| Width | 6 cm |
| Height | 6.4 cm |
| Depth | 2.7 cm |
| Weight | 0.022 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
Complaints
If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Instructions and documents
GPSR data
Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
