Help with Designing Optical Tachometer Circuit for RPM Meter

[Nathan Stevens]

Hi All,

I am looking for help with designing an optical none-contact
tachometer to a low cost RPM meter I already have.

Please take a look at the project description link below, if
interested.

https://docs.google.com/a/nyu.edu/document/pub?id=1ZX-eDIESG7lQyOPcmY-eREl6xJtsVztEwjg5gBZcFV0

Any help would be greatly appreciated.

[Nuno Sucena Almeida]

On 05/07/2012 01:49 PM, Nathan Stevens wrote:
> https://docs.google.com/a/nyu.edu/document/pub?id=1ZX-eDIESG7lQyOPcmY-eREl6xJtsVztEwjg5gBZcFV0
>
> Any help would be greatly appreciated.

Hi,
why do you want to use the RPM meter in the first place, just for the
display?
A RPM counter with display is fairly easy to do (and ready-made cheap
from that amazon link) and it seems a bit convoluted to interface it to
another one by recreating a EMF signal.
Could you elaborate?

regards,
Nuno

--
http://aeminium.org/nuno/

[Nathan Stevens]

I currently integrate this RPM meter in a controller for a brushless
motor based spin-coater (http://nathan.instras.com/projects/spin-
coater/index.html). However, I want to able to use a brushed motor to
achieve low RPMs (~100 RPMs), but keep most of the components the same
to reduce assemble time.

On May 8, 11:40 pm, Nuno Sucena Almeida <nuno...@aeminium.org> wrote:
> On 05/07/2012 01:49 PM, Nathan Stevens wrote:
>

> >https://docs.google.com/a/nyu.edu/document/pub?id=1ZX-eDIESG7lQyOPcmY...