aarg:
What is the output impedance of the sensor? Is it constant and stable regardless of the sensor reading? Trying to drag down a low impedance output that isn't designed for it is a bad engineering practice.What is this mystery sensor? Is there some reason you must conceal its identity from us? Not fully explicating the problem will definitely impact the quality of the answers you get.
Also, this forum is for Arduino questions. Where is the Arduino in this circuit?
Why would I conceal a sensor? Is that what you would do? I'm keeping my post as short as possible. Speak for yourself and stop being a grandma. I'm not a teenager who is looking for general advice on living. I'm specifically looking for a technical advise so keep yourself confined to it, if you may. What's the deal with wether this is for Arduino or not? You love policing people don't you. Please don't answer me I'ld rather have my question answered by someone else.
It's a delphi MAP sensor and according to the spec sheet: The load impedence seen by the sensor shall be 51kOhm.
I'm making a piggyback system for stock ECUs. In the first diagram, I'm simply reading the map signal thru Arduino's analog pin and outputting an adjusted voltage thru a dac module (MPC7425) so that the ECU thinks that the MAP is greater/lesser than actual thereby making the ECU increase/decrease the fueling.
The above mentioned circuit works perfect but like I said if there is a possibility to add a load or something to the line to reduce the voltage I wouldn't have to cut the wire.
But let's forget about all that. I'm not worried about toasting anything I'll find that out later. Can somebody please show me a way that for instance, I can simply tap into a 2.5V line and reduce it to let's say 2.2V. Is it possible?