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  1. D

    help with voltage reducing, then amplification

    We will probably still be working with instrumentation amplifiers, in terms of some we found at TI this came to mind: http://www.ti.com/lit/ds/symlink/ina114.pdf with a gain setting of G = 1 + 50k/R1, R1 obviously being the bridge resistance, but in terms of other ones we could use, such as just...
  2. D

    help with voltage reducing, then amplification

    Our group has been looking into that actually yes, in terms of the end product we are going for anyway this will probably be useful. Some of the chips we have been using right now are TI-LM301AP Op Amps and UA741CN Op Amps, which we weren't really sure were the best for this set up or not, so...
  3. D

    help with voltage reducing, then amplification

    In the lack of symmetry of resistances, do you mean via the wheatstone circuit within the sensor, or the amplifier circuit i had put up? I think we will be switching over to the 30 PSIA one, it will probably receive a better linear response and not fast approach the maximum. I will have to...
  4. D

    help with voltage reducing, then amplification

    So If i am to make the instrumentation amplifier as shown by attachment, I have V1 (The +Sig of sensor) roughly 2.58 volts and V2 (-Sig of sensor) at 2.45 volts, If I want the desired Vout of 5 volts for a Vin ((+sig - (-Sig)) [mind typo in picture] then I could use that possible configuration...
  5. D

    help with voltage reducing, then amplification

    This explains a lot, sorry forgot to mention one using. We are using a 15 psi (Absolute) sensor. I did some initial testing again this morning and found that there would be about 50mV change in voltage, depending on the pressure applied (at least for when i connected the + and -Sig to a...
  6. D

    help with voltage reducing, then amplification

    wow, this really helps a lot, (and made me feel like an idiot for forgetting about this haha, but ill work on that later). Thank you so much! Ill follow up tomorrow on if it has worked. Thank you again!
  7. D

    help with voltage reducing, then amplification

    I guess I could be wrong but it was my understanding that the +in and -in corresponded to the voltage supply, where the +out indicated that when pressure became applied, we would get a higher voltage, and for -out when pressure is applied, we get lower voltage.
  8. D

    help with voltage reducing, then amplification

    This is probably going to sound weird but, this has been bugging me the past week. In my senior engineering class, we are designing a pressure sensor circuit that will measure the changes in air bladder pressure when more force is acting on it. The theory behind it is, when more pressure is...
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