Originally Posted by Dennis Frie
Sorry, been busy the last couple of days...
The schematic you have drawn for Arduino Nano should be right
Nano uses same pins as Uno, duem etc:
D13 = SCK
D12 = MISO
D11 = MOSI
D10 = SS
The voltage-divider is also connected right
You can connect the voltage from urrent-sensor to Vin (called Raw sometimes) if you want to use the onboard regulator.
The current-sensor from Allegro is pretty bad at driving capacitive load, so you will need a large capacitor and pretty small capacitor. Can't remember the values, but did a quick calculation and showed a simulation a while ago.
You said, "You can connect the voltage from urrent-sensor to Vin (called Raw sometimes) if you want to use the onboard regulator."
Are you suggesting powering the Arduino's with a 3 or 4 cell ~ 11 + Volts? I guess I have been concerned about frying the little guys. And I heard switching BEC's are more efficient (for the larger V drops) then the linear voltage regulators (used by the Arduino's). So,,,,I have been using switching 5 ~ 5.5 V BEC regulators to power Arduino's. I got concerned and looked into when I saw folks frying their $200 APM2 boards
Maybe my concern is not valid ?
Don't linear voltage regulators get hot going from 11 + down to 5 ?