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1  Using Arduino / General Electronics / Re: Consolidating power supply on: October 07, 2012, 12:09:48 pm
Well the highest power draw is definitely going to come from 2 of these motors http://banebots.com/p/M5-RS550-12 which list 14.4V/85A max power draw.  Obviously I wouldn't want to run them at that for any length of time, but is there a way to narrow my search for boards that will handle that voltage, the moderate needs of a few smaller motors/servos, and the modest needs of a microcontroller and a few sensors.  It is a team of robots with slightly different configurations, but the motors and controllers are the same, and I'd like to use the same board across each for consistency.

Well just as a general statement one wouldn't normally want or need to supply regulated DC voltage to motors running at 14.4V/85A, but rather just power them directly from lead acid or Li-Po battery packs via a suitably rated motor controller. Then all the other electronics requiring regulated DC would be powered via switching regulator modules that would also use the raw 14.4vdc as their input voltage.

Lefty

Yes that would make a lot more sense wouldn't it...  I don't suppose there is a board that already combines a voltage regulator for the control circuit and the speed controller/relays for the brushed motors in one is there?
2  Using Arduino / General Electronics / Re: Consolidating power supply on: October 07, 2012, 11:51:43 am
Well the highest power draw is definitely going to come from 2 of these motors http://banebots.com/p/M5-RS550-12 which list 14.4V/85A max power draw.  Obviously I wouldn't want to run them at that for any length of time, but is there a way to narrow my search for boards that will handle that voltage, the moderate needs of a few smaller motors/servos, and the modest needs of a microcontroller and a few sensors.  It is a team of robots with slightly different configurations, but the motors and controllers are the same, and I'd like to use the same board across each for consistency.
3  Using Arduino / General Electronics / Consolidating power supply on: October 07, 2012, 11:06:46 am
I've currently joined a robotics group and the first glaring problem I found is we are using 4 different batteries in each robot as such:

12V battery -> Relay -> Motors
7.2V AND 9V battery to microcontroller, which drives servos, sensors, switches relay, and xbee radio
7.2V to custom acceleration sensor, which has built in logic to send a break signal at a fixed value

How I'd like to reorganize it, because these robots have reliability issues:

12V battery -> "X Board" -> voltage for boards, sensors, servos, and motor  (need 2 12V for motors, 1 9V maybe for arduino, 1 7.2V for the custome accelerometer, and several optional 5V for servos) that can be controlled by the microcontroller (which we intend to replace with an arduino of some flavor)

So I'm not really sure what such a board would be.  We have the ability to print our own circuit boards if necessary, but I hope such an item exists off the shelf.  What would the name of it be so I can search for it?
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