Differential amplifier - Electronic Circuits Projects Diagrams Free

brentonw2004 · 2nd February 2004, 04:31 AM

Hello everyone. I'll start by saying I don't know much about amplifiers. I am trying to use a pressure sensor on a pic, and it only has a 330mv difference from max pressure to min pressure. I need to set it up so that -30psi is 0V, 0psi is 2.5v, and 30psi is 5.0v. Someone told me that I would need a differential amplifier to do so. Does anyone have any input on how to do this, or even a part number for a differential amplifier. Also, anyone advice on interfacing a pic to a pressure sensor would be helpful.

Thanks!

tavib · 2nd February 2004, 04:42 AM

:lol:
You can use an AO to make this voltage conversion, like 741.
The schematic depend by input and output voltage range, but basically is simple.

Sebi · 2nd February 2004, 06:18 AM

Maybe good startpoint a Motorola application, like this:

2nd February 2004, 04:31 AM	(permalink)
brentonw2004 Experienced Member	Differential amplifier Hello everyone. I'll start by saying I don't know much about amplifiers. I am trying to use a pressure sensor on a pic, and it only has a 330mv difference from max pressure to min pressure. I need to set it up so that -30psi is 0V, 0psi is 2.5v, and 30psi is 5.0v. Someone told me that I would need a differential amplifier to do so. Does anyone have any input on how to do this, or even a part number for a differential amplifier. Also, anyone advice on interfacing a pic to a pressure sensor would be helpful. Thanks!

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2nd February 2004, 04:42 AM	(permalink)
tavib Experienced Member	:lol: You can use an AO to make this voltage conversion, like 741. The schematic depend by input and output voltage range, but basically is simple.