Hi.
I guess what I really want to do is invert the signal and add it back to the reference signal. I don't want a negative signal voltage.
I've been trying to solve an automotive electronics adaptation problem with my rather basic knowledge of electronics. I have a dual track position sensor in which the sensor outputs move in opposite directions. i.e Sensor 1 goes from roughly 0.5V to 4.5V while Sensor 2 goes from 4.5V to 0.5V. Both sensors share common +5V and 0V reference circuits. The control module is looking for both sensors to be moving in the same direction and I would like to reduce the range to approximately 0.5 to 4.0V. I will have a spare +5V and a spare 0V reference circuit from the module. From my research, I expect that it would be possible to turn the Sensor 2 signal around using an op amp circuit. I have a couple of LM358 op amps. http://www.national.com/pf/LM/LM358.html Not sure that I have it quite right though. So I am back to square one. Should I be able to do this with what I have available under the hood(i.e. no -ve supply)?
If I can get both signals moving in unison(some slight variation is allowed), then I will just have to keep the diagnostics satisfied that the sensor circuits are not shorted. I believe that one of the 5V ref circuits is periodically grounded to verify this in designs where both sensors' signals move in the same direction.
Any help or advice is much appreciated.
Thanks.
I guess what I really want to do is invert the signal and add it back to the reference signal. I don't want a negative signal voltage.
I've been trying to solve an automotive electronics adaptation problem with my rather basic knowledge of electronics. I have a dual track position sensor in which the sensor outputs move in opposite directions. i.e Sensor 1 goes from roughly 0.5V to 4.5V while Sensor 2 goes from 4.5V to 0.5V. Both sensors share common +5V and 0V reference circuits. The control module is looking for both sensors to be moving in the same direction and I would like to reduce the range to approximately 0.5 to 4.0V. I will have a spare +5V and a spare 0V reference circuit from the module. From my research, I expect that it would be possible to turn the Sensor 2 signal around using an op amp circuit. I have a couple of LM358 op amps. http://www.national.com/pf/LM/LM358.html Not sure that I have it quite right though. So I am back to square one. Should I be able to do this with what I have available under the hood(i.e. no -ve supply)?
If I can get both signals moving in unison(some slight variation is allowed), then I will just have to keep the diagnostics satisfied that the sensor circuits are not shorted. I believe that one of the 5V ref circuits is periodically grounded to verify this in designs where both sensors' signals move in the same direction.
Any help or advice is much appreciated.
Thanks.