# Will Pay for Help Need Design

E

#### [email protected]

Jan 1, 1970
0
I've been reading a lot of articles online and books but can;t seem to
pull off what i need. So i figure i will just pay someone to do it for
me. It actually pretty simple.

I need to be able to sense the impact/pressure being exerted, and
light a corresponding LED. I would like to have 3 LED colors and
display a different color depending on how much pressure is being
exerted.

For example if there is a high impact a red LED will be lit, Medium-
blue and Low-white. I would prefer to use a Microcontroller so that i
can add features later on and be able to edit the amount of pressure
needed to trigger each LED.

I'm thinking between $100-$200 let me know if you are interested. Also
any input you may have will be appreciated.

H

#### Homer J Simpson

Jan 1, 1970
0
I need to be able to sense the impact/pressure being exerted, and
light a corresponding LED.

What sort of impact/pressure/sensor?

W

#### Winfield Hill

Jan 1, 1970
0
I've been reading a lot of articles online and books but can;t seem
to pull off what i need. So i figure i will just pay someone to do it for
me. It actually pretty simple.

I need to be able to sense the impact/pressure being exerted, and
light a corresponding LED. I would like to have 3 LED colors and
display a different color depending on how much pressure is being
exerted.

For example if there is a high impact a red LED will be lit, Medium-
blue and Low-white. I would prefer to use a Microcontroller so that i
can add features later on and be able to edit the amount of pressure
needed to trigger each LED.

I'm thinking between $100-$200 let me know if you are interested.
Also any input you may have will be appreciated.

For that price you might be able to get the bare bones of a simple
analog design, including full adjustability, but I'm pretty sure that
a
digital design will have a higher design price tag. In fact, you
could
probably get an analog design here on s.e.d. for free. Or at least a
conceptual design, perhaps requiring a few nitty-gritty details to
work.

D

#### D from BC

Jan 1, 1970
0
I've been reading a lot of articles online and books but can;t seem to
pull off what i need. So i figure i will just pay someone to do it for
me. It actually pretty simple.

I need to be able to sense the impact/pressure being exerted, and
light a corresponding LED. I would like to have 3 LED colors and
display a different color depending on how much pressure is being
exerted.

For example if there is a high impact a red LED will be lit, Medium-
blue and Low-white. I would prefer to use a Microcontroller so that i
can add features later on and be able to edit the amount of pressure
needed to trigger each LED.

I'm thinking between $100-$200 let me know if you are interested. Also
any input you may have will be appreciated.

Money! 
This project reminds me of this:
http://www.national.com/pf/LM/LM3914.html
Didn't somebody already post that chip... not sure.
Anyways..
I program PIC microcontrollers the long hard way...in assembly
language so it's going to cost more than $200.00 (Sneaky smiley ) Also, I have a$1000.00 min.
Maybe you'll luck out and a student will make this a term project for

E

#### [email protected]

Jan 1, 1970
0
Money! 
This project reminds me of this:http://www.national.com/pf/LM/LM3914.html
Didn't somebody already post that chip... not sure.
Anyways..
I program PIC microcontrollers the long hard way...in assembly
language so it's going to cost more than $200.00 (Sneaky smiley ) Also, I have a$1000.00 min.
Maybe you'll luck out and a student will make this a term project for
$200.00. D from BC Are'nt there easier ways to program a PIC microcontroller besides assembly? D #### D from BC Jan 1, 1970 0 Are'nt there easier ways to program a PIC microcontroller besides assembly? Yes.. For your application , doing the code in a high level language like C would be preferred to reduce software development time. I'm only set up for assembly coding and didn't learn C compilers for PIC uC's yet.. Goofy me... D from BC L #### linnix Jan 1, 1970 0 I've been reading a lot of articles online and books but can;t seem to pull off what i need. So i figure i will just pay someone to do it for me. It actually pretty simple. I need to be able to sense the impact/pressure being exerted, and light a corresponding LED. I would like to have 3 LED colors and display a different color depending on how much pressure is being exerted. For example if there is a high impact a red LED will be lit, Medium- blue and Low-white. I would prefer to use a Microcontroller so that i can add features later on and be able to edit the amount of pressure needed to trigger each LED. I'm thinking between$100-$200 let me know if you are interested. Also any input you may have will be appreciated. Thanks in advance. Your biggest challenge is finding the right sensor. What kind of impact (in G, PSI, N) and how (soft or hard contact)? How are the sensors arranged in the application? H #### Homer J Simpson Jan 1, 1970 0 I would really prefer a digital design. And i am looking for more than just a design i would like a prototype. It's for my sons science project. I Can pay$300 for digital.

What will he learn from this?

Connect a cheap crystal microphone (Radio Shack) to an oscilloscope (eBay)
and you're done except for mounting the mic.

E

#### [email protected]

Jan 1, 1970
0
Your biggest challenge is finding the right sensor.
What kind of impact (in G, PSI, N) and how (soft or hard contact)?
How are the sensors arranged in the application?

I'm thinking PSI sensor would be best. the application is complicated
but i guess the closest application would be a light saber that would
flash the different colors based on the impact.

E

#### Eeyore

Jan 1, 1970
0
I've been reading a lot of articles online and books but can;t seem to
pull off what i need. So i figure i will just pay someone to do it for
me. It actually pretty simple.

I need to be able to sense the impact/pressure being exerted, and
light a corresponding LED. I would like to have 3 LED colors and
display a different color depending on how much pressure is being
exerted.

For example if there is a high impact a red LED will be lit, Medium-
blue and Low-white. I would prefer to use a Microcontroller so that i
can add features later on and be able to edit the amount of pressure
needed to trigger each LED.

I'm thinking between $100-$200 let me know if you are interested. Also
any input you may have will be appreciated.

It's begging for a simple analogue solution.

I'll design you the circuit for that much ( $200 ). Finding the right pressure transducer will be the tricky bit, you'd need to specify how it's required to physically mount etc, pressure thresholds etc. Graham E #### Eeyore Jan 1, 1970 0 Winfield said: For that price you might be able to get the bare bones of a simple analog design, including full adjustability, but I'm pretty sure that a digital design will have a higher design price tag. 100% agreed. In fact, you could probably get an analog design here on s.e.d. for free. Or at least a conceptual design, perhaps requiring a few nitty-gritty details to work. Selecting an appropriate pressure transducer will be the most time-consuming part. Graham E #### Eeyore Jan 1, 1970 0 Are'nt there easier ways to program a PIC microcontroller besides assembly? If you have a compiler, yes. E.g. http://www.melabs.com/products/pbc.htm I never do understand why ppl use asembler when a decent and inexpensive high level language is available. Graham E #### Eeyore Jan 1, 1970 0 I would really prefer a digital design. It's actually better suited to an analogue design ! If you went digital it would still make sense to have an amalogue 'front end'. And i am looking for more than just a design i would like a prototype. It's for my sons science project. I Can pay$300 for digital.

The digital bit wouldn't be doing anything clever.

Graham

E

#### Eeyore

Jan 1, 1970
0
D said:
Yes..
For your application , doing the code in a high level language like C
would be preferred to reduce software development time.
I'm only set up for assembly coding and didn't learn C compilers for
PIC uC's yet.. Goofy me...

C would be insane overkill for such an application but I can see ppl doing it.

I love that (void) bit !

Graham

E

#### Eeyore

Jan 1, 1970
0
Homer said:
What will he learn from this?

Connect a cheap crystal microphone (Radio Shack) to an oscilloscope (eBay)
and you're done except for mounting the mic.

Hey, if he wants to measure impacts from a hammer, that mic isn't going to last
long.

Graham

E

#### Eeyore

Jan 1, 1970
0
I'm thinking PSI sensor would be best. the application is complicated
but i guess the closest application would be a light saber that would
flash the different colors based on the impact.

A typical PSI sensor measures gas pressure.

Perhaps you could explain the type of impact you want to measure ?

Graham

P

#### p1dRobert

Jan 1, 1970
0
I've been reading a lot of articles online and books but can;t seem to
pull off what i need. So i figure i will just pay someone to do it for
me. It actually pretty simple.

I need to be able to sense the impact/pressure being exerted, and
light a corresponding LED. I would like to have 3 LED colors and
display a different color depending on how much pressure is being
exerted.

For example if there is a high impact a red LED will be lit, Medium-
blue and Low-white. I would prefer to use a Microcontroller so that i
can add features later on and be able to edit the amount of pressure
needed to trigger each LED.

I'm thinking between $100-$200 let me know if you are interested. Also
any input you may have will be appreciated.

It sounds like you need to measure shock, not pressure. Something like
the murata shock sensor PKS1-4A10 would seem appriopriate. Its cheap
and available from FARNELL or other such electronics stores. Its a
Piezo ceramic element that generates voltages when deformed. Of course
you still need to attach the processing electronics. As the others
have suggested in this post, I'm thinking an analog solution would be
better, unless you know how to program microprocessors.
As to paying someone to do it, I doubt you'll find anyone who'll do it
for that sort of money. I'm forever seeing potential clients walking
in to my design office thinking I can just whip something up in a few
hours. Theres a lot of pain staking detail to any project that few
Besides I think you're doing your son an injustice. He needs to do
this himself. How else is he going to learn anything and grow through
the experience.

Regards
Robert
http://www.priority1design.com.au

D

#### D from BC

Jan 1, 1970
0
If you have a compiler, yes. E.g.
http://www.melabs.com/products/pbc.htm

I never do understand why ppl use asembler when a decent and inexpensive high
level language is available.

Graham

I had an app where fastest code execution and precise timing was
important on the smallest uC.
So...I dodged the compiler...
However, I've had apps pop up where a compiler would pay off big
time...

D from BC

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