Rather than use a dual shield I will use two TB660's connected to 1 uno board as I would like to have independent control of each motor and the TB660's supply up to 4A, it looked like many of the other drivers supplied 2A and that might be pushing it a bit with the demands of the motors.
It looks like quite a straightforward set up, other than as I'm connecting 2 drivers to one Uno board and each driver requires 3 pins supplied with 5v, do you think I can supply all 6 pins with 5v from the 5V on the Uno board?
It runs on a variable voltage between 3v-6v. It says its source current up to 12 mA @ 3 V, 23 mA @ 5 V. Do you think it will still be ok to supply power to the pir and the 6 pins on both motor drivers?
I have read that when using many stepper motor drivers, one should use a capacitor close to the driver on the motor power supply to help with any spikes. I can't work out if its best to do this when using the TB6600?
Do you think I might encounter any problems wiring the stepper motors 3metres away from the drivers?