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7v from 12v? Answered

I need to run a 7v / 1.6 A DC water pump and a 12v / 1.13 A DC fan from a small portable battery pack. If I use maybe 8 "D" cell bateries, do I need a converter to power the 7v pump or will it work with 12v? Thank you,


If it's a 7V pump then by all means run it at 7V. Running it at a higher voltage will have a high risk of damage etc. You could always make a small voltage regulating circuit to power the pump. Have a look at the LM317T voltage regulator, for example.

We already answered this on your other question :P use a 12v big battery - and either a 7 volt voltage regulator, or a variable regulator capable of the current you need.