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Ok, so something like (moderator action: removed link to external source)? The output voltage behaves necessarily as I sweep the value of the sensor... But this doesn't solve the issue of having too much voltage running through the sensor, right? And how do I fine-tune the response? Do I need a...
damage to FSR: yes, that's possible... i couldn't find anything in the datasheet about it though
cap on wiper: to reduce noise
damage to pot: it won't always be at 100k... i will adjust it to regulate voltage coming in to FSR; when close to 0 resistance and an 18v source, the simulator gives me...
Hello. I'm planning a project which aims to regulate an output voltage from 0 to +5V DC by using a force sensitive resistor. I posted about this a while ago, and some forum members helped me create a schematic. Now I'm back. This is for a musical implementation: I own an effect pedal which...
Alright. I'm going to follow **broken link removed**. It's identical to yours, I simply added LM7805 (hopefully I wired the ground connection correctly). I chose 100uF for the bulk capacitor at the supply pin and 10uF for the stabilizing capacitor at the non-inverting input.
Thanks for that, Klaus! Just wondering if the capacitor on the non-inverting input is X7R or bulk?
I'm also a bit confused by your offset variable resistor. You connected it to the inverting input instead of non-inverting input... Okay, that makes sense, I think. But it's also connected to the...
Ok.
1) Do I also need that configuration at the non-inverting input, like **broken link removed** (C1 and C5)?
2)I didn't add a 100nF cap to the non-inverting side. Do I need one there as well?
3) Where should I put the a bulk capacitor and what would be its value?
Thanks!!
Ok! Here it is. **broken link removed**. How did I do? Did I include all necessary capacitors, and in the right places? I wasn't sure where to place the "big bulk capacitor." Also I'm not sure I placed the adjustable offset resistor in the right place.
I partly recognized it. I know you are right, but to my newb eyes I can't reconcile some things.
1) The capacitor C1 is in the negative feedback loop connected to the sensor and Vout. You suggested I add a capacitor to the voltage divider at the non-inverting input. So the circuit would have...
My apologies, I should have mentioned that. I want Vout of the opamp to vary between 0v and +5v which will connect to a Control Voltage input of a synthesizer audio effect, which will then control a specific parameter depending on the effect (e.g. volume, speed of an LFO, cutoff frequency of a...
Hello. I am attempting to follow **broken link removed**. I want to keep things small and cheap. How should I go about getting 5V DC for Vsupply and -1V DC (or less) for Vref? I was hoping to do this from a 9V DC source, but I am open to other ideas. I looked at voltage regulators but am not...
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