Anyone know anything about electronics? a month or two back I bought off Amazon a electric parking bollard, it the type that fold flat and then comes upright again, all my remote, after four weeks it has stopped working, to late to get refund from Amazon Fr, the seller, Chinese, has basically messed me about for over four weeks but has told me I can only have a small refund,  but I don't see an alternative. So I know a fair bit about auto and house electrics, so the motherboard is knac**** but the motor 6vlt and the gearbox works just fine, so I can get power from my electric gates and run two wires to the motor, but there is some sort of switch mechanism, looks optical to me, to stop the "Barrier" when its flat and to stop it at the upright position. What I think I need is something to cut off the power at these positions, I have thought of small reed switches,  but isn't there something that will sense the motor not being able to push it past these limit, a voltage load sensor perhaps don't know  but thanks for any help.