Best make it 5V output to SB. 5V power supplies are easy to find because 5V is the voltage of many processor chips and the standard voltage used in logic circuits. You need a regulator or resistor to adjust the voltage to 5V. 6V battery can get by with a resistor, but using a large 12V batt for longevity is too much for a resistor to drop, will waste a lot of power as heat.
I have been thinking about this battery supply idea too, found some ideas worth sharing (I hope!) Rechargeable batteries like NiCads when under load will give about 1.0-1.1 V, so a 5 cell pack might be ok if SB can handle 5.5 volts without damage. You would have to disconnect to charge. Nicad voltage changes a lot through discharge so it is never a steady voltage. not an ideal solution. Dry cells make 1.5 V. Supposedly SB will run o low voltages, but I don't know if it will start or sound good, still might not be good for it, and then the expense of throwaway batteries. This is a very nice step down regulator for our needs, but I haven't tried it yet. Use it with a big car or deep cycle marine 12V battery like Optima: http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1040,C1055,P10037,D2740 You might find this already made power supply to be an easier project than building your own from scratch: I use one of these with my SB and it is AWESOME, and is pretty cheap at about $40 plus the connector and a box. It's far better regulation than the linear Elpacs. http://power-one.com See model # HB5-3/OVP-A Good luck with your project! Rich -- richidoo ------------------------------------------------------------------------ richidoo's Profile: http://forums.slimdevices.com/member.php?userid=3097 View this thread: http://forums.slimdevices.com/showthread.php?t=30339 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
