On Fri, Feb 19, 2016 at 11:03 PM, Rizalino Antonio de Guzman <[email protected]> wrote: > I opted for the LM317 design due to the adjustable feature, since im > supplying 3.3, 5, 12 and possibly 18V. we're controlling multiple solenoids, > stepper motors, various sensors and multiple BBB on one system. i was > thinking designing the p/s in a parallel manner where i have multiple LM317s > connected to a single source (ie. battery)
You definitely don't want to use a linear regulator on a battery. because you will waste most of the battery energy in the regulator. If your battery is 25V and the BBB supply is 5V, and you're drawing 1A, 20W is being dissipated into heat in the linear regulator, while only 5W is being used productively to run the BBB. A switching power supply is not 100% efficient, but can attain 80-90% so you will only draw 5-6W from the battery and your system will last 4-5 times longer on the initial charge. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
