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Instead of using two separate 12V SLA batteries (one for motor controllers*, one for Arduino, LEDs, sensors ...), would they work in series as one 24V battery, with a step-down converter for each component?

Would this nullify voltage drop/spikes caused by motors that affects the electronics? Since each has its own converter for its required voltage?

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  • \$\begingroup\$ Typically you do not use voltage converters for motor loads, as the speed controls handle that. And at the voltage you are talking about, even under load sag there's headroom to regulate a computer load, so mostly what is needed is keeping the motor noise and inductive spikes out. \$\endgroup\$ – Chris Stratton Apr 17 at 6:14
  • \$\begingroup\$ @ChrisStratton converter for the motor controllers, not the motors directly*. what if a capacitor was added to the motors then? \$\endgroup\$ – etorobot Apr 17 at 6:17
  • \$\begingroup\$ No, not even then. Converters are an overcomplicated duplication of what a speed controller does more simply. \$\endgroup\$ – Chris Stratton Apr 17 at 6:19
  • \$\begingroup\$ Why wire the batteries in series, rather than parallel? \$\endgroup\$ – Simon B Apr 17 at 9:51
  • \$\begingroup\$ @SimonB the issue is with voltage, spiking and dropping because of the motors, and possibly damaging the electronics. with higher than required voltage stepped down for each component, the motors' voltage fluctuations would be nullified, theoretically. \$\endgroup\$ – etorobot Apr 18 at 20:24

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