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Oguz_ehm
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« on: December 13, 2009, 06:46:33 AM »
hi ! I've a project from my college that is called analog ammeter design.I couldn't find something about it.Is there anyone know something about this project.I'm waiting for your helps...
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Alex Tsekenis
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« Reply #1 on: December 13, 2009, 12:40:26 PM »
What are you required to do in this project?
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Oguz_ehm
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« Reply #2 on: December 13, 2009, 02:51:44 PM »
I need analog ammeter's circuit diagram and which materials are used in this circuit.I've been looking for that circuit novadays but I couldn't find. Please help me ..
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Alex Tsekenis
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« Reply #3 on: December 13, 2009, 02:56:52 PM »
You need to tell us more about your project. Do you need to build an analogue current meter yourself? Buy one?
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Alex

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Oguz_ehm
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« Reply #4 on: December 13, 2009, 03:19:03 PM »
Yes I'll built an analogue current meter and for that I need a circuit diagram and materials that are used in this circuit.
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Alex Tsekenis
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« Reply #5 on: December 13, 2009, 03:40:16 PM »
Ok. Very surprised they asked you to build an analogue current meter at college.
Is it for DC or AC? A simple current meter could have a coil of wire and a needle attached on a magnet.

http://isaac.exploratorium.edu/~pauld/summer_institute/summer_day15current/ammeter.html
http://chestofbooks.com/crafts/popular-mechanics/The-Boy-Mechanic-700-Things-for-Boys-to-Do/How-To-Make-An-Ammeter.html
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Alex

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Oguz_ehm
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« Reply #6 on: December 13, 2009, 04:09:28 PM »
thanks for your links.I'll build analog ammeter circuit for DC current. do you have any idea that i could make that circuit with simple electrical components (for example : resistors.. etc) ?
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Hero999
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« Reply #7 on: December 13, 2009, 04:19:34 PM »
Look it up on Wikipedia: http://en.wikipedia.org/wiki/Ameter

This is more of a mechanical project than electrical.

Care to mention the current range?

You might need a shunt resistor in parallel with the coil but that's about it.
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Alex Tsekenis
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« Reply #8 on: December 13, 2009, 04:30:52 PM »
The ammeter does not really require any resistors to work. It can be just a piece of wire.
You might need resistors to increase its range.

Another thing you can do is buy a ready analogue volt meter and connect it across a resistor of 1 Ohm.
Then the display will be in Amperes. See diagram attached and link.

http://uk.farnell.com/tyco-electronics-crompton/e242-89v-g-mt-mt/meter-din48-10vdc/dp/1227831

Moving coil or moving iron meters can only measure current really.

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Alex
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Regards,
Alex

Disclaimer: All content of my posts is intended for educational use only. Although the information is given in good faith, if you or any third party attempts to implement any content from my posts or posts related to mine in any way, you agree that you do so by accepting full responsibility for your actions. I will not be held liable in any way for any consequences or damage, direct or indirect, caused by your actions.
Hero999
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« Reply #9 on: December 13, 2009, 04:43:50 PM »
It's not cheap though, you could buy a decent DVM for less than that.

A 1Ω resistor would also dissipate 100W at the full range of 10A.

You're better off using a 50ľA or 100ľA meter with an appropriate value shunt resistor wired in parallel.

http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Test-Equipment/Moving-Coil-Meters/Moving-coil-meters/29433/kw/panel+meter
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Alex Tsekenis
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« Reply #10 on: December 13, 2009, 05:01:22 PM »
You need to tell us exactly what you are required to do Oguz_ehm.
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Alex

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Hero999
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« Reply #11 on: December 14, 2009, 07:37:21 AM »
Here's a cheaper meter.

It's probably not very accurate so will need calibrating.

http://www.maplin.co.uk/Module.aspx?ModuleNo=5635
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paulgyi
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« Reply #12 on: December 23, 2009, 11:20:45 PM »
How can i do Ampere Sensor with electronic device ? Please show me circuit diagram. Thank
 
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Alex Tsekenis
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« Reply #13 on: December 24, 2009, 03:48:31 AM »
Do you need a digital or analogue display paulhyi?
What range of currents?
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Alex

Disclaimer: All content of my posts is intended for educational use only. Although the information is given in good faith, if you or any third party attempts to implement any content from my posts or posts related to mine in any way, you agree that you do so by accepting full responsibility for your actions. I will not be held liable in any way for any consequences or damage, direct or indirect, caused by your actions.
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