amplifier help please - Electronic Circuits Projects Diagrams Free

paul200 · 21st January 2007, 11:50 AM

I have a sensor that outputs a range of +/- 0 to 5 volts
I need to convert this to protional range of +/- 0 to 10 volts

**Nigel Goodwin** · 21st January 2007, 11:59 AM

A non-inverting opamp with a gain of two!.

paul200 · 21st January 2007, 12:15 PM

I do not have any knowledge of programming.

**Nigel Goodwin** · 21st January 2007, 12:19 PM

There's no programming involved?.

But I would suggest you give far more details of EXACTLY what you are trying to do, instead of what you think you need.

paul200 · 21st January 2007, 12:22 PM

I am building a 3 axis gyro stabalised camera.

I have a spark fun gyro which outs a max of +/- 3 volts.
My servo amplifier needs a +/- 10volts.

paul200 · 21st January 2007, 12:32 PM

I had a look at the site but I think these are programmable chip?

**Nigel Goodwin** · 21st January 2007, 12:42 PM

That site is just the one in my signature, and NOT a reply to you, don't you know what an opamp is?.

paul200 · 21st January 2007, 12:46 PM

Yes I do know what op amp is. I need to know which type?

I thought you were pointing me to a web link sorry.

**Nigel Goodwin** · 21st January 2007, 12:49 PM

Quote:

Originally Posted by paul200

Yes I do know what op amp is. I need to know which type?

I wouldn't have thought it matters much, it should be a pretty easy task - but without exact details it's impossible to advise.

Hero999 · 21st January 2007, 02:54 PM

Quote:

Originally Posted by paul200

Yes I do know what op amp is.

Well now you do.

Quote:

I need to know which type?

That depends on exactly what you want to do, a µA741 will do for most things below audio frequencies.

paul200 · 21st January 2007, 04:16 PM

Because the input voltage will be either a plus or minus value I didnt think a 741 would do

**Nigel Goodwin** · 21st January 2007, 04:35 PM

Quote:

Originally Posted by paul200

Because the input voltage will be either a plus or minus value I didnt think a 741 would do

Almost any opamp will, they work from split supplies and with signals either side of zero.

paul200 · 21st January 2007, 04:43 PM

looking at 741 circuit diagrams the all show input terminals marked as plus and minus.

this is why I posted because the positve terminal will be a minus value some of the time

**Nigel Goodwin** · 21st January 2007, 05:00 PM

Quote:

Originally Posted by paul200

looking at 741 circuit diagrams the all show input terminals marked as plus and minus.

this is why I posted because the positve terminal will be a minus value some of the time

All opamps are marked like that, they aren't positive and negative, they are non-inverting and inverting.

When I asked if you knew what an opamp was, you lied didn't you?

paul200 · 21st January 2007, 05:12 PM

why do you say I lied.

there is plenty of info on op amps but did not answer my particular question.
I have built several op amps for different projects.

I came to this site for help not to be called a lier

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21st January 2007, 11:50 AM	(permalink)
paul200	amplifier help please I have a sensor that outputs a range of +/- 0 to 5 volts I need to convert this to protional range of +/- 0 to 10 volts

21st January 2007, 11:59 AM	(permalink)
Nigel Goodwin	A non-inverting opamp with a gain of two!. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

21st January 2007, 12:15 PM	(permalink)
paul200	I do not have any knowledge of programming.

21st January 2007, 12:19 PM	(permalink)
Nigel Goodwin	There's no programming involved?. But I would suggest you give far more details of EXACTLY what you are trying to do, instead of what you think you need. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

21st January 2007, 12:22 PM	(permalink)
paul200	I am building a 3 axis gyro stabalised camera. I have a spark fun gyro which outs a max of +/- 3 volts. My servo amplifier needs a +/- 10volts.

21st January 2007, 12:32 PM	(permalink)
paul200	I had a look at the site but I think these are programmable chip?

21st January 2007, 12:42 PM	(permalink)
Nigel Goodwin	That site is just the one in my signature, and NOT a reply to you, don't you know what an opamp is?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

21st January 2007, 12:46 PM	(permalink)
paul200	Yes I do know what op amp is. I need to know which type? I thought you were pointing me to a web link sorry.

21st January 2007, 04:16 PM	(permalink)
paul200	Because the input voltage will be either a plus or minus value I didnt think a 741 would do

21st January 2007, 04:43 PM	(permalink)
paul200	looking at 741 circuit diagrams the all show input terminals marked as plus and minus. this is why I posted because the positve terminal will be a minus value some of the time

21st January 2007, 05:12 PM	(permalink)
paul200	why do you say I lied. there is plenty of info on op amps but did not answer my particular question. I have built several op amps for different projects. I came to this site for help not to be called a lier