For a project I am required to use a sensor to generate a continuous signal varying between 0 - 3.3V, and it has to drop to at least 0.1V and raise to 3.2V.
I'm using an Ultrasonic Rangefinder and have managed to get a steady dc level from the output that ranges between 0.3V - 2.3V. Using a non-inverting amp would get me 3.3V but I'm struggling to get the voltage below 0.3V.
I've looked at differential amps but I haven't managed to get one working. So far I don't have anything apart from failed attempts so any help pointing me in the right direction would be great!
I have access to pos/neg rails but in the project I would have to a 7660 to generate the negative rail as we're only allowed to use a positive 5V supply.
I've trawled most of the google hits already and not found much to help me, but I may have been looking at the wrong things. Any links and/or explanations would be great! Thanks
I'm using an Ultrasonic Rangefinder and have managed to get a steady dc level from the output that ranges between 0.3V - 2.3V. Using a non-inverting amp would get me 3.3V but I'm struggling to get the voltage below 0.3V.
I've looked at differential amps but I haven't managed to get one working. So far I don't have anything apart from failed attempts so any help pointing me in the right direction would be great!
I have access to pos/neg rails but in the project I would have to a 7660 to generate the negative rail as we're only allowed to use a positive 5V supply.
I've trawled most of the google hits already and not found much to help me, but I may have been looking at the wrong things. Any links and/or explanations would be great! Thanks