electronic balance - Electronic Circuits Projects Diagrams Free

ada · 16th March 2006, 06:29 AM

heloo...i need help.i would like to know what is inside an electronic balance? what mechanism or circuit is used inside it?..thanks alot.

akg · 16th March 2006, 06:31 AM

Quote:

Originally Posted by ada

heloo...i need help.i would like to know what is inside an electronic balance? what mechanism or circuit is used inside it?..thanks alot.

look for strain guages.

ada · 16th March 2006, 06:42 AM

yeah..we know that it has something to do with strain gauge..and usually for weighing its connect with a load cell....called strain gauge load cell..however this used for industrial machinery...and it is very expensive..so we want to find out what is in the electronic balance..so that it is much a cheaper alternative..n maybe we can use the same principle/circuit to help in our project..

ada · 16th March 2006, 07:23 AM

so..i don't think strain gauge load cell is used inside..coz then an electronic balance would cost hundreds of dollars which is expensive for us..so what exactly is used in the electronic balance??

RDL2004 · 16th March 2006, 02:59 PM

How much do you need to weigh?

Buy a couple and take them apart, You can get the small pocket size for $10 or less, the bigger ones you can stand on and weigh yourself are $20 or so.

spuffock · 20th March 2006, 11:50 AM

Its a strain gauge. Stick-on strain gauges can be had for a few dollars. You have to specify the metal you're sticking them onto, or different rates of expansion with temperature will make it a thermometer as well as a balance.

Oznog · 20th March 2006, 06:35 PM

I've taken apart an old electronic bathroom scale and it looked like they have a movable core inside an inductor. There's a spring to counter the person's weight and as it's stretched it pulls out the core lowering the inductance. At least that's how I interpreted its design. I don't know if they all use strain gauges nowadays or not.

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16th March 2006, 06:29 AM	(permalink)
ada	electronic balance heloo...i need help.i would like to know what is inside an electronic balance? what mechanism or circuit is used inside it?..thanks alot.

16th March 2006, 06:42 AM	(permalink)
ada	yeah..we know that it has something to do with strain gauge..and usually for weighing its connect with a load cell....called strain gauge load cell..however this used for industrial machinery...and it is very expensive..so we want to find out what is in the electronic balance..so that it is much a cheaper alternative..n maybe we can use the same principle/circuit to help in our project..

16th March 2006, 07:23 AM	(permalink)
ada	so..i don't think strain gauge load cell is used inside..coz then an electronic balance would cost hundreds of dollars which is expensive for us..so what exactly is used in the electronic balance??

16th March 2006, 02:59 PM	(permalink)
RDL2004	How much do you need to weigh? Buy a couple and take them apart, You can get the small pocket size for $10 or less, the bigger ones you can stand on and weigh yourself are $20 or so.

20th March 2006, 11:50 AM	(permalink)
spuffock	Its a strain gauge. Stick-on strain gauges can be had for a few dollars. You have to specify the metal you're sticking them onto, or different rates of expansion with temperature will make it a thermometer as well as a balance.

20th March 2006, 06:35 PM	(permalink)
Oznog	I've taken apart an old electronic bathroom scale and it looked like they have a movable core inside an inductor. There's a spring to counter the person's weight and as it's stretched it pulls out the core lowering the inductance. At least that's how I interpreted its design. I don't know if they all use strain gauges nowadays or not. __________________ I thought what I'd do was I'd pretend I was one of those deaf-mutes.