Hi all,
What I'm attempting to do is use a bend sensor from Spectra Symbol to provide an output of 0-5v. I've pored over the various diagrams, looking mostly at this:
which outlines how to use an op amp to provide a 0 - 5v swing in the output. I measure 11K to 22K fully bent.
Here's my problem. I've wired and rewired that circuit on a breadboard and cannot get it to function properly. My questions for the forum are this;
1. How do i provide a negative 5v Vref? Do I need another part in front of the op amp? It seems pretty important to be able to provide a negative Vref...
2. The Op Amps I have are TS272s, LT1168s, LT1101 and a quad Op Amp, are any of these what I need? Do I need a rail to rail op amp?
3. Do i need to provide the Op Amp with power? In each of the various diagrams I've only seen the inverting, non inverting and output connected, never Vcc or anything else.
4. Really this is my first official Op Amp circuit so I I'd appreciate any additional advise.
I'm open to getting any additional parts but I'd like to be able to solve this quandary. This will be for a gestural interface project using an Eobody 1: http://www.mesi.fr/page_produits.php?prod=16
What I'm attempting to do is use a bend sensor from Spectra Symbol to provide an output of 0-5v. I've pored over the various diagrams, looking mostly at this:
which outlines how to use an op amp to provide a 0 - 5v swing in the output. I measure 11K to 22K fully bent.
Here's my problem. I've wired and rewired that circuit on a breadboard and cannot get it to function properly. My questions for the forum are this;
1. How do i provide a negative 5v Vref? Do I need another part in front of the op amp? It seems pretty important to be able to provide a negative Vref...
2. The Op Amps I have are TS272s, LT1168s, LT1101 and a quad Op Amp, are any of these what I need? Do I need a rail to rail op amp?
3. Do i need to provide the Op Amp with power? In each of the various diagrams I've only seen the inverting, non inverting and output connected, never Vcc or anything else.
4. Really this is my first official Op Amp circuit so I I'd appreciate any additional advise.
I'm open to getting any additional parts but I'd like to be able to solve this quandary. This will be for a gestural interface project using an Eobody 1: http://www.mesi.fr/page_produits.php?prod=16