Can anyone tell me if Air-Core motors can be attached to the Javelin?

FCIProject

Hi

I am investiagting using the Javelin Stamp for a project I am working on. I know Java pretty well so using this for programming hardware will be a good method.

Can anyone tell me if Air-Core motors can be attached to the Javelin?

Electronics is a new challenge for me, so please reply in laymans details.

I look forward to someones reply.

Regards

Gary

[noparse][[/noparse]Subject Added by Moderator]

Post Edited By Moderator (Chris Savage (Parallax)) : 4/26/2007 5:47:41 PM GMT

Peter Verkaik

Gary,
I googled for Air-Core motors
and got a list of datasheets.
http://www.onsemi.com/PowerSolutions/parametrics.do?id=407
Datasheet of one of the dip versions
http://www.onsemi.com/pub/Collateral/CS4121-D.PDF
shows the need of sin and cos signals.
I think you can use the javelin by using such a chip, with the
javelin generating the pulsetrain (FreqIn). The datasheets specifies the
frequency as 0-20kHz.


regards peter

FCIProject

Hi Peter

Thanks for looking into that for me.

As long as it is conceptually possible to hook up an Air-Cire, using a driver chip, to Javelin that is excellent.

Cheers

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Gary Edwards
FCIProject
www.ge-tec.co.uk

Peter Verkaik

The only bad thing is that you cannot set the frequency in a lineair fashion.
With PWM, you set the low and high period (F=1/T). One option is to encode
a frequency in main code, setting a pin low and high in a loop but that may
be too restrictive.
An other option is to use DAC, which runs in the background, and apply
its analogue output, to a separate Voltage-to-Frequency chip (aka VCO).
That lets you set the frequency in a lineair fashion and then just
run your application code.

regards peter

FCIProject

I will have to talk to my friend, who is an electronics wizard, about that.

Thanks

Gary

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Gary Edwards
FCIProject
www.ge-tec.co.uk