Data send-receive by IIC-bus Hardware: IIC-board with 4 x PCF8574 IC you see a 8bit leds this leds show the value from an other 8574 who has 8 switches as input The 8xswitches from IIC you can see also at the pins PC_0 to PC_7
Thats my logo Brandenkopf tower Black forest Germany:
This is my hardware:
This is a farmer house in the black forest:
And this is a screenshot of a PWM Signal.
The sinus signal is the result whe nyou give the PWM to a R-C circuit:
And in the middle of the three grazy persons: That`s my person:
Neumaier Feb 2018