# This time using a length of 50cm oil float sensor, slide the slider in the top 10k, sliding down to 0.[[File:Schematic_2.png|600px|none|thumb|]]  

# This time using a length of 50cm oil float sensor, slide the slider in the top 10k, sliding down to 0.[[File:Schematic_2.png|600px|none|thumb|]]  

# Because the program is collected in this way: Acquisition, when the PA0 port pulled low close to 0V.As the ADC data acquisition needs current into the PA0 port will have a voltage drop.  

# Because the program is collected in this way: Acquisition, when the PA0 port pulled low close to 0V.As the ADC data acquisition needs current into the PA0 port will have a voltage drop.