The circuit I built used a ULN3751Z (TO-220) amplifier chip and some capacitors
to create the phase shifts for making 3 phase. Very simple oscillator circuit.
Haven't found the docs yet but found the unit itself.
On 3/27/2013 6:59 PM, Bill Ezell wrote:
I neglected to mention that. The DC resistance of the motor windings is
roughly 200 ohms. I estimate the power draw is < 2 watts. Haven't measured the
inductance.
I probably could just use some FETs and build a simple class-B amp. The sine
wave doesn't have to be absolutely pure. Frequency stability (at least, in a
real application) is more important, since the gyro response depends upon the
rotational speed of the wheel. Not that I'm going to actually use it for
anything other than just getting it working. :)
On 03/27/2013 6:21 PM, time-nuts-requ...@febo.com wrote:
For "thumbsized" gyros, the power-drain is probably very slight.
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