moonstreat
New Member
Use the LM7806
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Lot of heat and presumabely the chip can't provide enough power itself. It's a fair chance it will blow.Use the LM7806
However, the design of output stage to the motor will affect this voltage or effect behaviour. Is there a half bridge or is there a single transistor where a protection diode is placed in parallell to the motor?
Assuming the fan motor is inductive and the output stage is a half bridge. Then the dc voltage (as seen from the motor) should be around half as much. If that isn't enough (motor isn't pure inductive), the half bridge can be followed by an inductor to make a (almost) steady dv voltage and there could be a cap parallell to the motor. That should give output ≈ 6V.
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i try to reduce the 12v7ah sla battery to run 8" fan which required 6V, but only 1-15 ohms 2watt registor in series is work but the R is may burn within a minit. what should i do to down 12 v to 6 volt
What so what?