Quote:
Originally Posted by Alan Anderson
Since both the Driver Station and the Linksys WRT610N router are customarily powered by 12 volts DC, why get fancy? Just use a robot battery wired to a couple of Size M power connectors and be done with it.
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I agree with Alan on this one. However, you could use a PD to boost your 7.2V up to 12V.
In general, using resistors for power regulation is a BadIdea(TM). Since they don't have any feedback mechanism, they vary wildly with input and output conditions. If you use a series R, you need to know your load current well - unfortunately, most logic devices only draw power when they need it, so you will swing around quite a bit. If you use a resistor divider, you can partially alleviate the low idle current problem by replacing it with a high idle current problem.
Use a linear regulator or a switcher, (almost) always.