Quality switching supplies are dirt cheap so save your time and money and get one!
On Sat, Feb 20, 2016 at 3:39 PM, Przemek Klosowski < [email protected]> wrote: > 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. > -- Developing next generation wireless audio -- 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.
