Buchempfehlung:
Roboter-Autos mit dem Raspberry Pi

Roboter Autos mit dem Raspberry Pi

Today I finished my self designed I²C Hub with an integrated level shifter.

I2C Hub with two SRF08 ultrasonic sensors

I2C Hub with two SRF08 ultrasonic sensors

As level shifter I used the “4-channel I2C-safe Bi-directional Logic Level Converter – BSS138” from adafruit. Now it is possible to connect to the hub four 3.3V I²C devices plus the Raspberry Pi as 3.3V device and five 5.0V I²C devices and the Raspberry Pi as master. For the first test I connectec two ultrasonic sensors SRF08 as shown in the picture below on the 5.0V side of the board.

I2C Hub with level shifter

I2C Hub with level shifter

The picture below shows the I²Cdetect command executed in the terminal window. Both connected SRF08 ultrasonic sensors where found on the bus.

I2C Hub Raspberry Pi i2c detect SRF08

I2C Hub Raspberry Pi i2c detect SRF08

The hub is perfect for my robot car I actual build. With the 3.3V on one side and 5.0V on the other side I am now able to use 5.0V devices as well on my Raspberry Pi which is initially a 3.3V device.

I2C Hub with two SRF08 ultrasonic sensors 2

I2C Hub with two SRF08 ultrasonic sensors 2

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