12v Battery voltage regulation

Owen

I have a battery operated project that uses stepper motors with driver boards (interinar Bsd-02, www.interinar.com) being controlled by a propellar chip. The motor driver boards have regulators built on to them rated from 7v to 30v. the entire device will be powered from a 12v battery. I plan to use a LM2937ET-3.3 Voltage Regulator for the propellar chip and a LM2940CT-5.0 Low Dropout Voltage Regulator for any 5v accesories i have. Is there any reason I should regulate the voltage from the battery before the stepper driver boards?

Thanks,
Owen

LoopyByteloose

Battery power is unlike AC in that it is isolated from things like refrigerators and air conditioners.
Such devices are a major reason for regulation.

If the three lines all have separate regulation, you will probably be fine.
The steppers may be a major source of noise that might otherwise interfer with the Propeller and control circuits.

You should try to avoid ground loops by having one 'star-like' ground network topology or a simple line [noparse][[/noparse]a to b to c to d ].

Keep it simple and if there is any trouble, the trouble shooting will be simple.

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