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Old Dec 06, 2003, 11:52 PM
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Joined Nov 2002
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Stewart I had looked at the microchip brushless controller example. I will probably try and build one one of these days.
The easiest one to build to get something going quick looks like the TDA5144 chip. I found one in a maxtor hard drive model no
71336a. Probably these things can be had for really cheap by the dozen. I would say folks throw them away.

Jeff maybe stdying the 5142 might help in figuring out how to connect up some fets. I have not realy thought much about how the fet would effect back emf maybe their is a kind of fet that allows current to flow back through it or something. I have not studied how the sensorless controller works enough to know how to deal with it. There is some kind of transconductance amplifier on board the 5144 maybe that is what its for.

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