Ok I will start off saying that it has been a very long time since i did any major theory work with op-amps so excuse my rustiness but here goes.
So I am going to install a secondary fuel tank underneath the tray of my ute and plumb a pump into the OEM tank operated by a switch in the cab for refueling (all above board in my state). however all the pumps i have found can take anywhere from 15minutes to a full hour to empty the proposed secondary tank so i will most likely not remember to switch the pump off and probably burn it out on the first couple of uses.
So my idea is to use a fuel level sender to not allow the pump to run when the tank nears empty. As it will be under the tray of a ute that see a fair bit of water and off roading I have my doubts about the longevity of a home made circuit (but if anyone can suggest a diagram for one with common prts that would also be much appreciated). So i there some form of off the shelf voltage comparator for cheap or am i limited to building my own?
Edit: I forgot to mention that i have seen some fuel level senders with a built in low level alarm but all of them seem rather expensive here is Aus
Thanks,
SimpleJoe
So I am going to install a secondary fuel tank underneath the tray of my ute and plumb a pump into the OEM tank operated by a switch in the cab for refueling (all above board in my state). however all the pumps i have found can take anywhere from 15minutes to a full hour to empty the proposed secondary tank so i will most likely not remember to switch the pump off and probably burn it out on the first couple of uses.
So my idea is to use a fuel level sender to not allow the pump to run when the tank nears empty. As it will be under the tray of a ute that see a fair bit of water and off roading I have my doubts about the longevity of a home made circuit (but if anyone can suggest a diagram for one with common prts that would also be much appreciated). So i there some form of off the shelf voltage comparator for cheap or am i limited to building my own?
Edit: I forgot to mention that i have seen some fuel level senders with a built in low level alarm but all of them seem rather expensive here is Aus
Thanks,
SimpleJoe