Subject:
|
Re: 3-wire converter for homebrew sensors
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Thu, 25 Mar 1999 19:37:02 GMT
|
Original-From:
|
rajackson@qnx.com%IHateSpam%
|
Viewed:
|
1001 times
|
| |
|
|
Previously, you (Michael Gasperi) wrote:
> In lugnet.robotics, Dennis Clark writes:
> > Ahh, but the stipulated purpose for Pete's sensor brick is that it gives
> > a _linear_ response that isn't corrupted by the non-linear diode drop
>
> It is a heck of a lot of complexity for a little added linearity. If you look
> at the plots on my general purpose interface section; the simple resistor
> interface is pretty linear. I think most of the nonlinearity in the powered
> version is due to the cheap LM324 I used. A better opamp would produce better
> results.
As for the diode vs FET, the package used for surface mount is going to be the
same so there is no size penalty. The only thing I might change is the regulator,
on battery powered equipment I would tend to a DC to DC converter like Motorola's
MC33463. I guess it's over kill on something that also driving motors though ;-)
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
|
|
1 Message in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
