Thx everyone so far for other design ideas on some of my other threads. I am getting close to finishing.
Details. 12V Mosfet-Bridge, 2amp max, approx 20Khz.
BEMF, I have noticed a number of IC's for this. But I have also seen a simple circuit that users some type of resistor devider, then feeds directly into the ADC of a PIC. The two resistors are in series directly across the DC motor polls which are both 10K each. Between the resistors a connection is made directly to the ADC.
Question time
How does this type of thing work?
With a 10Bit ADC what bit resolution will this get me?
Howdo you work out resolution, I noticed someone asked me in another thead but I did not know?
What is the difference in using two resistors verus an IC that does this ?
Do the resistors need to be extreamly high tolorance?
Have I missed anything?
Details. 12V Mosfet-Bridge, 2amp max, approx 20Khz.
BEMF, I have noticed a number of IC's for this. But I have also seen a simple circuit that users some type of resistor devider, then feeds directly into the ADC of a PIC. The two resistors are in series directly across the DC motor polls which are both 10K each. Between the resistors a connection is made directly to the ADC.
Question time
How does this type of thing work?
With a 10Bit ADC what bit resolution will this get me?
Howdo you work out resolution, I noticed someone asked me in another thead but I did not know?
What is the difference in using two resistors verus an IC that does this ?
Do the resistors need to be extreamly high tolorance?
Have I missed anything?