KAmod I2C Hub Qwire
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Description
KAmod I2C Hub Qwire - I2C Bus Splitter
The KAmod I2C Hub Qwire allows you to connect multiple modules and peripheral devices to a single I2C port. The board is equipped with 4 I2C Qwire connectors (compatible with Qwiic/STEMMA QT), an I2C connector compatible with the Kamami standard, and a 2.54 mm pitch goldpin header containing 8 groups of I2C signals. The board features an LED indicating the presence of power supply and 4.7 kΩ pull-up resistors for the I2C interface lines, which can be easily disconnected if necessary.
The module does not have a built-in controller, so it does not allow connecting several devices with the same I2C address.
Basic Parameters
- 4 I2C Qwire connectors, JST SH 4-pin 1 mm type (compatible with Qwiic / STEMMA QT)
- I2C connector compatible with the Kamami standard for connecting KAmod series expansion modules
- Goldpin header containing 8 groups of signals:
- SCL - I2C bus clock line
- SDA - I2C bus data line
- 3V3 - power supply
- GND - system ground
- Power supply status LED (can be disconnected to reduce power consumption)
- Jumper to disable the LED operation
- Jumpers for independent disconnection of the pull-up resistors (to the positive power supply rail) from the I2C bus lines
- Dimensions: 24 x 37 mm
Standard Equipment
| Code | Description |
|---|---|
| KAmod I2C Hub Qwire |
|
Schematic
I2C Qwire Connectors
The KAmod I2C Hub Qwire board contains four I2C Qwire (JST SH 1 mm) connectors compatible with Qwiic / STEMMA QT.
This is a connection standard for modules equipped with an I2C interface, enabling quick module connection without the need for soldering.
Goldpin Connectors
The module is equipped with 8 groups of goldpin connectors connected to the I2C bus lines: SDA and SCL, as well as power lines: GND and 3.3 V (as labeled on the PCB).
Color-coded goldpins allow for quick orientation and help avoid errors during connection.
Kamami I2C Connector
The KAmod I2C Hub Qwire module features the I2C connector used in many KAMAMI kits with an I2C interface. Connections can be made using a compatible cable labeled CAB_HU04-30 from the KAMAMI.pl offer.
Configuration Jumpers
The KAmod I2C Hub Qwire module is equipped with an SMD jumper to disconnect the "PWR LED" (JP1) and a double jumper "I2C PULLUPS" (JP2), which allows for independent disconnection of the pull-up resistors from the I2C bus lines.
The jumpers are located on the bottom side of the board and are closed by default (copper trace between pads). To open the jumpers, cut the surface of the board with a sharp tool as indicated by the red lines in the figure below. Reconnecting the jumpers is possible by applying a small drop of solder to bridge the cut pads.
Dimensions
The module dimensions are 24x37 mm. There are 4 mounting holes with a diameter of 2.7 mm on the board.
