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68HC11 Project

Started by nilesfantasy November 18, 2005
I was wondering if anyone could suggest a simple project that could be
conducted on the Motorola 68HC11. We had originally thought of doing a
digital thermometer but another group has already proposed to doing
that. We were looking for something along those lines though. Any
suggestions would be greatly appreciated.



maybe you can try on design a voltmeter or maybe a calculator or what. Those are the most commom students project topic.

nilesfantasy <nilesfantasy@nile...> wrote: I was wondering if anyone could suggest a simple project that could be
conducted on the Motorola 68HC11. We had originally thought of doing a
digital thermometer but another group has already proposed to doing
that. We were looking for something along those lines though. Any
suggestions would be greatly appreciated. SPONSORED LINKS
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Measurement of the speed of air.
Or other weather parameters.

-----Original Message-----
From: m68HC11@m68H... [mailto:m68HC11@m68H...]On Behalf
Of nilesfantasy
Sent: den 18 november 2005 16:07
To: m68HC11@m68H...
Subject: [m68HC11] 68HC11 Project I was wondering if anyone could suggest a simple project that could be
conducted on the Motorola 68HC11. We had originally thought of doing a
digital thermometer but another group has already proposed to doing
that. We were looking for something along those lines though. Any
suggestions would be greatly appreciated.

Yahoo! Groups Links




In a message dated 11/18/05 10:11:36 A.M. Eastern Standard Time,
nilesfantasy@nile... writes:

I was wondering if anyone could suggest a simple project =========================
Car tachometer. Sniff the alternator bumps on the battery 12V.


BobGardner@BobG... wrote:
>
> In a message dated 11/18/05 10:11:36 A.M. Eastern Standard Time,
> nilesfantasy@nile... writes:
>
> I was wondering if anyone could suggest a simple project > =========================
> Car tachometer. Sniff the alternator bumps on the battery 12V.

I recommend against this. There are three problems with it
which are, I deem, enough to make it unsuitable for the
newbie

(1) Power conditioning. Automotive supplies have spikes on them,
often exceeding 70V. Connecting a computer directly via a
cigarette lighter power outlet, say, will almost certainly
result in a dead computer.

(2) Signal conditioning. Same issue.

(3) Environmental problems. This is a little less of an issue
with a project, but with a serious design it would be. Automobiles
are subject to enormous variations in temperature and humidity,
and enormous amounts of vibration (can you say "no sockets allowed").

Another issue is that the RPM so indicated would be specific to
a particular automobile. Also, usually, one must demonstrate
the project. This means having an *alternate* means to show
the actual RPM, and also getting the prof. to go out into
the parking lot and watch the demonstration there, rather
than in the lab.

Mike
--
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This message made from 100% recycled bits.
You have found the bank of Larn.
I can explain it for you, but I can't understand it for you.
I speak only for myself, and I am unanimous in that!




In a message dated 11/18/05 4:01:53 P.M. Eastern Standard Time,
Mike.McCarty@Mike... writes:

I recommend against this. There are three problems with it
which are, I deem, enough to make it unsuitable for the
newbie
=====================

HehHeh.... yeah... its a neat project tho...I bet he picks this one


--- In m68HC11@m68H..., "nilesfantasy" <nilesfantasy@y...> wrote:
>
> I was wondering if anyone could suggest a simple project that could be
> conducted on the Motorola 68HC11.
...

One of the first "real" projects I did with a microcontroller was a
simple digital clock.

If you go with this idea, I'd suggest using a dedicated LED driver IC
(see http://www.maxim-ic.com for some good candidates) or a character
mode LCD module for a display. The only other hardware you'll need
(other than your micro development board) are a few pushbuttons tied
to inputs (with pull-up or pull-down resistors) that you'll use to set
the clock.


--- In m68HC11@m68H..., "nilesfantasy" <nilesfantasy@y...>
wrote:
>
> I was wondering if anyone could suggest a simple project that could
be
> conducted on the Motorola 68HC11. We had originally thought of doing
a
> digital thermometer but another group has already proposed to doing
> that. We were looking for something along those lines though. Any
> suggestions would be greatly appreciated.
>

Pressure measurement is close to my heart.

You could make a frequency counter. Look in this lists archives and
you might find offer of some software.

Emmett Redd



On 18 Nov 2005 at 15:07, nilesfantasy wrote:

> I was wondering if anyone could suggest a simple project that could be
> conducted on the Motorola 68HC11. We had originally thought of doing a
> digital thermometer but another group has already proposed to doing
> that. We were looking for something along those lines though. Any
> suggestions would be greatly appreciated.
>

Seems to me that sending a single msg out the SCI to a dumb terminal would qualify.
After that, try sending msgs both ways, with responses from the HC11. That's about as
simple as you can get, unless you are using Buffalo and an EVB. If you want a safe
tach project, measure pulses from a brushless motor or a stepper You could control the
motor with your HC11 or just measure pulses from a manually controlled motor and write
the speed to some output device. You can protect the chip with a Schmitt trigger.

Is this a hardware project, a software project, or both? You don't say if you have to
design your own boards, or if you will use a kit, or some such. Anyway, Tom Fox's
"Programming and Customizing the HC11 Microcontroller" has both hardware and
software stuff for weather apparatus.

There are at least a gazillion small projects described on half a gazillion Web sites
dealing with all kinds of things MC68HC11. Do some research, get some ideas, and
dream up your own project. You'll learn a lot more that way.

Good luck,
Dan

Daniel Bull, PhD
Managing Partner
Hyperion Research LLC
9 Over Rock Road
Scituate, MA 02066 USA
Phone 00-1-781-545-6610
Fax 00-1-781-545-6615
www.hyperionresearch.com



At 2005-11-19 00:12, Daniel Bull wrote:
>On 18 Nov 2005 at 15:07, nilesfantasy wrote:
>
>> I was wondering if anyone could suggest a simple project that could be
>> conducted on the Motorola 68HC11. We had originally thought of doing a
>> digital thermometer but another group has already proposed to doing
>> that. We were looking for something along those lines though. Any
>> suggestions would be greatly appreciated.
>>
>
>Seems to me that sending a single msg out the SCI to a dumb terminal would qualify.
>After that, try sending msgs both ways, with responses from the HC11. That's about as
>simple as you can get, unless you are using Buffalo and an EVB. If you want a safe
>tach project, measure pulses from a brushless motor or a stepper You could control the
>motor with your HC11 or just measure pulses from a manually controlled motor and write
>the speed to some output device. You can protect the chip with a Schmitt trigger.
>
>Is this a hardware project, a software project, or both? You don't say if you have to
>design your own boards, or if you will use a kit, or some such. Anyway, Tom Fox's
>"Programming and Customizing the HC11 Microcontroller" has both hardware and
>software stuff for weather apparatus.
>
>There are at least a gazillion small projects described on half a gazillion Web sites
>dealing with all kinds of things MC68HC11. Do some research, get some ideas, and
>dream up your own project. You'll learn a lot more that way.

Very good points.

But reading it I came up with a project that doesn't need
much hardware and software, but has a nice effect: Make a
board (PCB) with 8 (or 10) leds that when you wave it about
will show a text in the air. For the presentation darken
the room, but just to make sure, also make some foto's
with a camera with a long exposure time.

Please consider that whatever nice project you do, how
it comes over during the presentation is what counts,
so make the project as simple as possible and make sure
the impact during the presentation is big!