[time-nuts] OT - DC-10 gyros
nerd at verizon.net
Wed Mar 27 19:52:21 EDT 2013
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
> 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-request at febo.com wrote:
>> For "thumbsized" gyros, the power-drain is probably very slight.
More information about the time-nuts