booksbybibin : Messages : 993-1022 of 1966

hi everyone, i'm a new member and my name is dasril

Can anyone tell me how to control rc servo motor using atmega32 in c languange or assembler. Previously i used at89s51 to control rc servo in assembler languange.

Thanx before,

"Dasril"

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#994

From: "deepu_iiitj" <deepu_iiitj@...>
Date: Tue Sep 4, 2007 3:58 pm
Subject: weight sensor

deepu_iiitj

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

#995

From: nitin chaudhary <nitin2162000@...>
Date: Wed Sep 5, 2007 5:30 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

nitin2162000

yes, but they are little bit costly

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#996

From: nitin chaudhary <nitin2162000@...>
Date: Wed Sep 5, 2007 5:34 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

nitin2162000

yes, but they are costly.

tell me where are you using them

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#997

From: "joekumanchik" <joekumanchik@...>
Date: Wed Sep 5, 2007 2:19 pm
Subject: Re: weight sensor

joekumanchik

--- In booksbybibin@yahoogroups.com, "deepu_iiitj" <deepu_iiitj@...>
wrote:
>
> hi all ,
> hey i m new to autonomous filed....actually made differential drive
in
> robotics field...can anyone tell me abt a sensor which can measure d
> weight of things ....do weight sensor type thing exist ,..
> plz help..
> waiting for reply
>
Look at load cells and strain guages. These devices can measure
weight.Look at this site.

http://www.omega.com/prodinfo/loadcells.html

#998

From: Mukesh Wadhwani <wadhwani_mukesh@...>
Date: Wed Sep 5, 2007 12:41 pm
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

wadhwani_mukesh

Obviously they exist, otherwise Digital Weight Scales would never have been possible.

Load Cell is the most common weight sensor available in market & is extensively used in these weight scales. Find out one that matches your range.

All the best

Regards,
Wadhwani Mukesh M.
Junior Telecom Officer (GSM),
BSNL, Maharashtra.

deepu_iiitj <deepu_iiitj@...> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

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#999

From: amit kumar <amit24981@...>
Date: Thu Sep 6, 2007 6:39 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

amit24981

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@...> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
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#1000

From: DEEPAK KUMAR JAIN <deepu_iiitj@...>
Date: Fri Sep 7, 2007 8:43 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

deepu_iiitj

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram.....can we have its internal circuitary....

plz do reply...

amit kumar <amit24981@...> wrote:

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@yahoo.co.in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
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Deepak Kumar Jain
Undergraduate Student
Electronics Engineering
Room No. 213
Hostel 2
Indian Institute of Information Technology
Jabalpur-485011

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#1001

From: nitin chaudhary <nitin2162000@...>
Date: Fri Sep 7, 2007 3:38 pm
Subject: Weight Sensors

nitin2162000

As far as i have searched, you cant make of your own.

Generally, load cells have 5 pins:Vcc,GND,NC and 2 for outputs.They gives output as variable viltage or resistance according to weight applied.

For more info. on weight sensors, there are few links you can try

http://www.freepatentsonline.com/4624331.html
http://www.interfaceforce.com/

Do google for costs of load cells

Ambitious

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#1002

From: senthilraja <lsenthilraja@...>
Date: Fri Sep 7, 2007 3:34 pm
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

lsenthilraja

Hi Deepak Kumar,

load cell cannot be made easily at home.
and load cell is a simple combinations of four stain gauges connected as a bridge. and glued on a metallic bar.
we can make the load cell by purchasing strain gauges......but we have to comprimise on its accuracy and reliability...because the comercially available load cell has temperature and age related compensation, which is built in....where we fails often..

and making a load cell will become a good project for you.....so please buy the comercially available load cell as per your requirement and do use in your project.

and for any further information please mail me immediately.

"Start by doing what's necessary, then what's possible and suddenly you will be doing the impossible."

C.Senthilraja
Mobile: +919840955782

----- Original Message ----
From: DEEPAK KUMAR JAIN <deepu_iiitj@...>
To: booksbybibin@yahoogroups.com
Sent: Friday, 7 September, 2007 2:13:33 PM
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram..... can we have its internal circuitary.. ..

plz do reply...

amit kumar <amit24981@yahoo. com> wrote:

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@ yahoo.co. in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.

Deepak Kumar Jain
Undergraduate Student
Electronics Engineering
Room No. 213
Hostel 2
Indian Institute of Information Technology
Jabalpur-485011

Why delete messages? Unlimited storage is just a click away.

#1003

From: nitin chaudhary <nitin2162000@...>
Date: Sat Sep 8, 2007 5:32 am
Subject: ADC,Cam

nitin2162000

Hi everybody
        1) Can someone plze give me the program for internal ADC of ATmega8 in       AVR Studio 4.12.

        2) I want to use spycam in my next robotics project.Will it be nice to use the camera of webcam(i think it is small in size) and i need help in making its transmitter and receiver which will be then interfaced with laptop.
                    Plze do reply.

Ambitious

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#1004

From: "Mike Bronosky" <Brewskister@...>
Date: Sat Sep 8, 2007 10:10 pm
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

brewski922

While I don't know the weight range you want.. I think every digital bathroom scales has strain gages and/or load scale. A different range would be a digital baby scales. Then there is digital kitchen scales that weigh in grams.

Salvaging the strain gage/load scale from a digital kitchen scales you could us it in a project, along with a micro controller and supporting parts, to count things like nut, bolts or medication tablets.

What weight range are you looking for?

Mike

On 9/7/07, senthilraja <lsenthilraja@...> wrote:

Hi Deepak Kumar,

load cell cannot be made easily at home.
and load cell is a simple combinations of four stain gauges connected as a bridge. and glued on a metallic bar.
we can make the load cell by purchasing strain gauges......but we have to comprimise on its accuracy and reliability...because the comercially available load cell has temperature and age related compensation, which is built in....where we fails often..

and making a load cell will become a good project for you.....so please buy the comercially available load cell as per your requirement and do use in your project.

and for any further information please mail me immediately.

"Start by doing what's necessary, then what's possible and suddenly you will be doing the impossible."

C.Senthilraja
Mobile: +919840955782

----- Original Message ----
From: DEEPAK KUMAR JAIN <deepu_iiitj@yahoo.co.in>
To: booksbybibin@yahoogroups.com
Sent: Friday, 7 September, 2007 2:13:33 PM
Subject: Re: [booksbybibin, www.booksbybibin.tk] weight sensor

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram..... can we have its internal circuitary.. ..

plz do reply...

amit kumar <amit24981@yahoo. com> wrote:

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@ yahoo.co. in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.

Deepak Kumar Jain
Undergraduate Student
Electronics Engineering
Room No. 213
Hostel 2
Indian Institute of Information Technology
Jabalpur-485011

Why delete messages? Unlimited storage is just a click away.

Why delete messages? Unlimited storage is just a click away.

#1005

From: "Dixit" <dixitsolanki@...>
Date: Sat Sep 8, 2007 2:46 pm
Subject: MODBUS Protocol Using 8052 or Else

dixitsolanki

Dear All,

Can Anybody help me to generate code for MODBUS protocol based communication application via 8052 chip or any other AVR chips.

THANKS & WITH REGARDS,

Dixit Solanki,

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#1006

From: amit kumar <amit24981@...>
Date: Mon Sep 10, 2007 6:03 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

amit24981

Hi,

It depends on ur application....if u require exact measurement than u hav to buy it....but for just rough ideas of weight u can even design it urself.U can make it using linear potentimeter and simple pen spring,or u can make use of two parallel plates with spring and differential amp to measure capacitance change b/w plates when weight applied.

The main aim of our sensor is to calculate the exact displacement propotional to weight applied...that is simplest logic for making weight sensor.

So u can use any logic to convert displacement of sping to weight.....and ur cheap homemade sensor is READY.

Hop it wil help u out

DEEPAK KUMAR JAIN <deepu_iiitj@...> wrote:

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram.....can we have its internal circuitary....

plz do reply...

amit kumar <amit24981@yahoo.com> wrote:

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@yahoo.co.in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.

Deepak Kumar Jain
Undergraduate Student
Electronics Engineering
Room No. 213
Hostel 2
Indian Institute of Information Technology
Jabalpur-485011

Why delete messages? Unlimited storage is just a click away.

Be a better Heartthrob. Get better relationship answers from someone who knows.
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#1007

From: "ramnathbabutj" <ramnathbabutj@...>
Date: Mon Sep 10, 2007 2:52 pm
Subject: Camera on a mobile Robot

ramnathbabutj

HI
    can any one suggest me a DSP or somthing similar that can be used
for "ONBOARD" Image Processing ( within <below> 12 V , coz that is a
requirement in all robotics contests...) if possible ,with its cost
and a simple code/demo plaease

Thank You in advance

Ramnath Babu T J

#1008

From: "prerak_joshi4u" <prerak_joshi4u@...>
Date: Fri Sep 14, 2007 7:19 am
Subject: Re: weight sensor

prerak_joshi4u

--- In booksbybibin@yahoogroups.com, "deepu_iiitj" <deepu_iiitj@...>
wrote:
>
> hi all ,
> hey i m new to autonomous filed....actually made differential drive in
> robotics field...can anyone tell me abt a sensor which can measure d
> weight of things ....do weight sensor type thing exist ,..
> plz help..
> waiting for reply
>
it's lvdt tranduscer

#1009

From: "keinsteins" <kelssunday@...>
Date: Wed Sep 12, 2007 9:13 am
Subject: adxl330 accelerometer

kelssunday

How do you convert adc reading from the output of adxl330
accelerometer to gs. What formula,algorithm or procedure do you use to
calibrate this sensor so that vibrations & schock can be properly read
from the adxl330 accelerometer with a 12bit adc, vref+=3.3v, vref-
=gnd, Vdd=3.3v PIC processor or atmel.
Thanks

#1010

From: Zeeshan Sharif <zeeshan_iiee@...>
Date: Thu Sep 13, 2007 5:15 am
Subject: Implementation of Digital PID .... Please Help.... Urgent

zeeshan_iiee

Assalamo Allykum !

I want to implement the Digital PID using the PIC Microcontroller.

I am using the built-in Dc of the PIC Microcontroller. I am providing the reference to the PIC by the Keypad and taking the feedback from the sensor.

If the feedback of the sensor is less the reference then there is no problem in the Error generation. But when the feedback is greater than thereference ten the error is negative.

If the error is negative then how I can output this to the DAC. I am generating the corresponding error using DAC.

If the error is +ve then the DAC is generating the corrrect error in the terms of the Voltage.

But

If the error is negative then the DAC is not generating the correct output.

Basically I am Implementing the PID Controller for the Motor Positioning Control System.

I am using the Equation of the Digital PID given in the book "Modern Control System" BY Dorf.

I am implementing the equation in the z-transform.

If any one have anyidea about this then please send it to me. I will be very thankful to u.

If any one have implement the Digital PID or If any one have the Project Report related to the Implementation of Digital PID then please send it to me.

Thanks in advance.

Take Care

Keep remember me in your prayers.

Allah Hafiz

Zeeshan Shareef

Industrial Electronics Engineering

IIEE, PCSIR, Karachi, Pakistan

+92-321-3805211

+92-21-4576645

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#1011

From: DEEPAK KUMAR JAIN <deepu_iiitj@...>
Date: Sat Sep 15, 2007 6:24 pm
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

deepu_iiitj

hi amit

thanks for giving me wondrous idea of makink load cell using a linear potentiometer and a simple spring....hey can plz shed more light on dis topic....

i will be grateful to u for this help.....

deepak

amit kumar <amit24981@...> wrote:

Hi,

It depends on ur application....if u require exact measurement than u hav to buy it....but for just rough ideas of weight u can even design it urself.U can make it using linear potentimeter and simple pen spring,or u can make use of two parallel plates with spring and differential amp to measure capacitance change b/w plates when weight applied.

The main aim of our sensor is to calculate the exact displacement propotional to weight applied...that is simplest logic for making weight sensor.

So u can use any logic to convert displacement of sping to weight.....and ur cheap homemade sensor is READY.

Hop it wil help u out

DEEPAK KUMAR JAIN <deepu_iiitj@yahoo.co.in> wrote:

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram.....can we have its internal circuitary....

plz do reply...

amit kumar <amit24981@yahoo.com> wrote:

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@yahoo.co.in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.

Deepak Kumar Jain
Undergraduate Student
Electronics Engineering
Room No. 213
Hostel 2
Indian Institute of Information Technology
Jabalpur-485011

Why delete messages? Unlimited storage is just a click away.

Be a better Heartthrob. Get better relationship answers from someone who knows.
Yahoo! Answers - Check it out.

Why delete messages? Unlimited storage is just a click away.

#1012

From: "appy_sg" <appy.sg@...>
Date: Sun Sep 23, 2007 12:01 pm
Subject: ATMEGA32 with 3310 graphics lcd

appy_sg

hi.
i am new to the field of microcontrollers and i am working on a small
project which involves interfacing a ATMEGA32 with a Nokia 3310
graphics display. i am having a lot of trouble with the code. can u
please suggest some site where i can access this code?? PLEASE HELP!!!

aparna

#1013

From: "echo_mahesh" <echo_mahesh@...>
Date: Tue Sep 25, 2007 8:39 am
Subject: How to run a program that was burnt on the microcontroller

echo_mahesh

hi,
every microcontroller has got 4 or 5 blocks. where many programs can
be burnt. then how to start executing which program upon startup when
not connected to pc.

upon giving power of chip which program it should run. how?

Reply | Messages in this Topic (2)

#1014

From: amit kumar <amit24981@...>
Date: Tue Sep 18, 2007 5:44 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

amit24981

Hello Deepak,

As I mentioned earlier u just hav to take one pen spring and put that one in same dia pipe.Now make piston type arangement just above that spring and attach ur Linear POT to that piston rod.Make sure at zero weight the the piston is completly out with Linear POT to its max or Min resistance value.Take zero rsistance point of Linear POT as zero weight point.now increase weight on rod until spring gets compressed just completely.So here u get Max point.Now u can link spring diplacement with weight applied using maths equations.

Further ti improve resolution of ur sensor .... just take different weights and measure the resistance value of POT with these weights.U can now make a look up table for sensor with diffrent weights and program that in ur Microcontroler or just some linaer equation and use that to correspond POT resistance with weight applied to Sensor.

Beleive me this technique works very very fine .....just need little bit of R&D......but it wil save ur lots of money as Load cells are very very costly.

Hop it will help u out.

Take Care

Amit Kumar

Delhi

DEEPAK KUMAR JAIN <deepu_iiitj@...> wrote:

hi amit

thanks for giving me wondrous idea of makink load cell using a linear potentiometer and a simple spring....hey can plz shed more light on dis topic....

i will be grateful to u for this help.....

deepak

amit kumar <amit24981@yahoo.com> wrote:

Hi,

It depends on ur application....if u require exact measurement than u hav to buy it....but for just rough ideas of weight u can even design it urself.U can make it using linear potentimeter and simple pen spring,or u can make use of two parallel plates with spring and differential amp to measure capacitance change b/w plates when weight applied.

The main aim of our sensor is to calculate the exact displacement propotional to weight applied...that is simplest logic for making weight sensor.

So u can use any logic to convert displacement of sping to weight.....and ur cheap homemade sensor is READY.

Hop it wil help u out

DEEPAK KUMAR JAIN <deepu_iiitj@yahoo.co.in> wrote:

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram.....can we have its internal circuitary....

plz do reply...

amit kumar <amit24981@yahoo.com> wrote:

Hi,

The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@yahoo.co.in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

Boardwalk for $500? In 2007? Ha!
Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.

Deepak Kumar Jain
Undergraduate Student
Electronics Engineering
Room No. 213
Hostel 2
Indian Institute of Information Technology
Jabalpur-485011

Why delete messages? Unlimited storage is just a click away.

Be a better Heartthrob. Get better relationship answers from someone who knows.
Yahoo! Answers - Check it out.

Why delete messages? Unlimited storage is just a click away.

Catch up on fall's hot new shows on Yahoo! TV. Watch previews, get listings, and more!

#1015

From: "usrrsr" <usrrsr@...>
Date: Tue Sep 25, 2007 5:42 pm
Subject: Re: ATMEGA32 with 3310 graphics lcd

usrrsr

--- In booksbybibin@yahoogroups.com, "appy_sg" <appy.sg@...> wrote:
>
> hi.
> i am new to the field of microcontrollers and i am working on a small
> project which involves interfacing a ATMEGA32 with a Nokia 3310
> graphics display. i am having a lot of trouble with the code. can u
> please suggest some site where i can access this code?? PLEASE
HELP!!!
>
> aparna
>

just go through elecronics for you magezine last month issue for same

regards

ulhas

#1016

From: shiv krishna <shivela39@...>
Date: Wed Sep 26, 2007 7:29 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] Re: ATMEGA32 with 3310 graphics lcd

shivela39

Hai all,

You can refer my project details on last month EFY. The picture conversion software can be downloaded from my web site dlmkerode.tripod.com

should you need any support please contact me in my mail ID.

Regards,

Shivakumar.R

usrrsr <usrrsr@...> wrote:

--- In booksbybibin@yahoogroups.com, "appy_sg" <appy.sg@...> wrote:
>
> hi.
> i am new to the field of microcontrollers and i am working on a small
> project which involves interfacing a ATMEGA32 with a Nokia 3310
> graphics display. i am having a lot of trouble with the code. can u
> please suggest some site where i can access this code?? PLEASE
HELP!!!
>
> aparna
>

just go through elecronics for you magezine last month issue for same

regards

ulhas

Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more.

#1017

From: "appy_sg" <appy.sg@...>
Date: Wed Sep 26, 2007 8:21 am
Subject: Re: ATMEGA32 with 3310 graphics lcd

appy_sg

hi

i have the magazine as a reference... havent tried the source code
given with that as i have got a different program which was
specifically coded for a MEGA32... the  problem is that with AVRSTUDIO
compiler i'm gettin errors for statements such as typedef char( error:
undefined macro for both typedef and char) and ponyprog compiler just
isnt compiling the program neither is it displaying any errors.
i thought of using the code provided with the efy mag as a last resort...
thanks for mentioning it though. if u can provide some solution to
this problem i would really appreciate it.

aparna

#1018

From: recep tasan <recep_tasan@...>
Date: Wed Sep 26, 2007 7:00 pm
Subject: RE: [booksbybibin,www.booksbybibin.tk] weight sensor

recep_tasan

To: booksbybibin@yahoogroups.com
From: amit24981@...
Date: Mon, 17 Sep 2007 22:44:53 -0700
Subject: Re: [booksbybibin,www.booksbybibin.tk] weight sensor

Hello Deepak,

                As I mentioned earlier u just hav to take one pen spring and put that one in same dia pipe.Now make piston type arangement just above that spring and attach ur Linear POT to that piston rod.Make sure at zero weight the the piston is completly out with Linear POT to its max or Min resistance value.Take zero rsistance point of Linear POT as zero weight point.now increase weight on rod until spring gets compressed just completely.So here u get Max point.Now u can link spring diplacement with weight applied using maths equations.

Further ti improve resolution of ur sensor .... just take different weights and measure the resistance value of POT with these weights.U can now make a look up table for sensor with diffrent weights and program that in ur Microcontroler or just some linaer equation and use that to correspond POT resistance with weight applied to Sensor.

Beleive me this technique works very very fine .....just need little bit of R&D......but it wil save ur lots of money as Load cells are very very costly.

Hop it will help u out.

Take Care

Amit Kumar

Delhi

DEEPAK KUMAR JAIN <deepu_iiitj@yahoo.co.in> wrote:

hi amit

thanks for giving me wondrous idea of makink load cell using a linear potentiometer and a simple spring....hey can plz shed more light on dis topic....

i will be grateful to u for this help.....

deepak

amit kumar <amit24981@yahoo.com> wrote:

Hi,

   It depends on ur application....if u require exact measurement than u hav to buy it....but for just rough ideas of weight u can even design it urself.U can make it using linear potentimeter and simple pen spring,or u can make use of two parallel plates with spring and differential amp to measure capacitance change b/w plates when weight applied.

The main aim of our sensor is to calculate the exact displacement propotional to weight applied...that is simplest logic for making weight sensor.

So u can use any logic to convert displacement of sping to weight.....and ur cheap homemade sensor is READY.

Hop it wil help u out

DEEPAK KUMAR JAIN <deepu_iiitj@yahoo.co.in> wrote:

hey thanx for ur valuable msg..but i wanna ask..can't we make load cell...i mean can't we have d circuit diagram.....can we have its internal circuitary....

plz do reply...

amit kumar <amit24981@yahoo.com> wrote:

Hi,

   The exact name for weight sensors is Load cells.They easy available in market and are commonly used in Digital weighting machines.

Just search for LOAD cell in google nearest to u....but they r costly.

deepu_iiitj <deepu_iiitj@yahoo.co.in> wrote:

hi all ,
hey i m new to autonomous filed....actually made differential drive in
robotics field...can anyone tell me abt a sensor which can measure d
weight of things ....do weight sensor type thing exist ,..
plz help..
waiting for reply

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#1019

From: "ahmeda_whab" <ahmeda_whab@...>
Date: Wed Sep 26, 2007 10:34 am
Subject: Re: micromouse

ahmeda_whab

--- In booksbybibin@yahoogroups.com, "aries_butterfly84"
<aries_butterfly84@...> wrote:
>
> hi i'm a new member and my name is rina currently i'm doing my
final
> project. My robot is ready and now i need to program the robot. I'm
> using micro C as a language and using crystal clock 20mhz. my
> microcontroller is PICF877A and my sensor is IR (IS 471F)
>
> 1)My first problem is the robot cannot move straight in a line. So
on
> the maze when it moves straight it keeps heading to the left wall.
> What can i do?
>
> 2)how to program the sensor?.. Actually I am an IT student and i
don't
> have knowledge in sensors
>
> thank you
>

I am Ahmed Abdulwhhab
I progrma PIC using MIKROC as a tool
my current project is to switch sensor on when a person has a space
between my circut nearly 15 cm
i use two sensors
the first IR TX and IR RX which is used in serial interace (1838) at
38 KHZ which is used in Remote control
the second sensor
is the IR as a transmitter and the receiver is PhotoDiode

I found after some experiments that the corroect IR Tx can be done
by 555 as timer (R1=100 ohm , R2=10K as varible resistence and
C=10nf)

if you want to chat with me send me an SMS on Mobile +20102986151
and i will chat you at yahoo messenger

hav a nice day

Reply | Messages in this Topic (6)

#1020

From: "aries_butterfly84" <aries_butterfly84@...>
Date: Fri Sep 28, 2007 7:59 am
Subject: micromouse

aries_butter...

Hai my name is rina

I have make a programming in mikroC..so that the sensor will detect the
wall and it's works. but my problem is how to assigned a value to each
of the cell of the maze and how to make the robot know the size of each
cell..

i'm using DC motor, PIC16F788A, ir sensor
thank you

Reply | Messages in this Topic (6)

#1021

From: shiv krishna <shivela39@...>
Date: Fri Sep 28, 2007 9:48 am
Subject: Re: [booksbybibin,www.booksbybibin.tk] Re: ATMEGA32 with 3310 graphics lcd

shivela39

Hai,

The source code is written for ATmega8515 micro. You can modify it to ATmega32.

Use Winavr jan 2007 compiler for comiling the source code.

Regards,

shivakumar.R

appy_sg <appy.sg@...> wrote:

hi

i have the magazine as a reference... havent tried the source code
given with that as i have got a different program which was
specifically coded for a MEGA32... the problem is that with AVRSTUDIO
compiler i'm gettin errors for statements such as typedef char( error:
undefined macro for both typedef and char) and ponyprog compiler just
isnt compiling the program neither is it displaying any errors.
i thought of using the code provided with the efy mag as a last resort...
thanks for mentioning it though. if u can provide some solution to
this problem i would really appreciate it.

aparna

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#1022

From: "udit_kansal" <udit_kansal@...>
Date: Wed Oct 3, 2007 6:39 am
Subject: programming for ATmega8 with UCflash programmer

udit_kansal

Hi

I am trying to program the mega8 using the UCmicrosys's UCflash AVR
programmer. I am using winAVR for this. However, winAVR needs me to
specify the kind of programmer type while making the makefile which i
need before i can compile my code.

Unfortunately, the UCflash programmer does not appear in the list
given. I tried using the BSD and interfacing my mega8 using hte LPT1
port. Unfortunately, the winAV was now able to open the LPT port. I
dont know why. I went through your parallel port interfacing book, and
i have tried everything including useport, lpt.exe, etc. I hace
checked my LPT port settings in BIOS and i have verifed the address.
My motherboad is Intel945 original chipset, which i beleive is
creating the problem.

Anyways, so I am back to the programmer for which i spent around
3000Rs. I am not able to undestand how to create the hex file using
WinAVR which i can uploadto the spftware module which came with my
programmer.

Please help as i m totally confused right now. This is ugent.

Thanks
Udit