Archive for February 2016

I2C Hub with integrated level shifter

Feb 29th, 2016 | By
I2C Hub with two SRF08 ultrasonic sensors

Today I finished my self designed I²C Hub with an integrated level shifter. 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 and five 5.0V I²C devices and the Raspberry Pi as master. For the

[continue reading…]



Raspberry Pi – controlling servo motors

Feb 11th, 2016 | By
Servo motors

This post is about controlling two servo motors with a Raspberry Pi. You can buy cheap pan & tilt kits or build one by yourself. I bought a pan & tilt kit for my robot-cars and build one kit by myself with two servo motors and a cardboard tube. To build the security-robot I used

[continue reading…]



SRF08 Ultrasonic Range sensor with I2C bus

Feb 10th, 2016 | By
SRF08 Ultrasonic Distance Sensor

I decided to buy the SRF08 ultrasonic range finder sensor because of the I2C bus. I build too many sensors into my robot car and got problems with all the wires installed inside the car. The HC-SR04 sensors I used before measured many failures because of all the magnetic fields generated by the 60 wires

[continue reading…]