View Full Version : BS2 SX + PCF8574 + Stepper

08-11-2005, 04:44 PM

my BS 2SX is connected to 6 PCF8574 and each PCF8574 is connected to 2 stepper motors. They work fine but I've got problem concerning the power supply.

each of my steppers need 5-12V and I've connected a AC-->DC (12V, 400mA) power supply.
I've tried to connect 1 power supply to 2 steppers, at the beginning, it works well but after 1/2 hour, the power supply blows but others are fine.

My question is what kind of power supply I'll need to minimise the no. of plug, means can I just connect 1 power supply to 12 steppers? if yes, how many V and mA is that power supply?


Chris Savage
08-11-2005, 08:59 PM

Without knowing the specs for the Stepper Motors that would be difficult at best to guess. How much current does each Stepper Motor draw?

Chris Savage
Parallax Tech Support
csavage@parallax.com (mailto:csavage@parallax.com)