I have an AC voltage source of about 30V 4A, and would like to measure the current drawn by the load. The measuring uC would get power from the 30V (via rectification, and etc). What I am wondering is if the below method would work for this?
I would assume that I should use a 0.025 ohm resistor if its going to be a 0.5W shunt for the 30V 4A.
Then I would probably need a ???ohm voltage divider resistor of .25W?
I am not sure if this would work, could you please tell me. Part of my concern is I dont know exactly how the ADC's would react to this. Thanks in advance for all of your help
I would assume that I should use a 0.025 ohm resistor if its going to be a 0.5W shunt for the 30V 4A.
Then I would probably need a ???ohm voltage divider resistor of .25W?
Rich (BB code):
Voltage Source-----------Rectifier-----------Resistor(.025)----------LOAD---Back to v. source
| | |
uC ADC1 ADC2 | |
Diode Diode
V. Divider v. Divider
To ADC1 To ADC2