Good Morning, i have a small project i am trying to get my head around, I have limited electronics knowledge, so i am not too great with the terminology
Project is this:
I have a paddle shift steering wheel i wish to fit and control the up and down shifts of a tiptronic gearbox,
The paddles have a 2 pin connection, the circuit is 270 K Ohm with the switches un activated, press down and the resistance drops to 337 Ohm, press up and the resistance is 1.01 K Ohm.
The gearbox requires to be put into sport mode (shift to left from drive, grounding sport in addition to drive wires from the gearbox ecu) once in sport mode upshifts and downshifts can be activated by grounding the relevant wire.
I also have 2 buttons available on my steering wheel which are no longer used, so i had planned to try and incorporate one of those buttons to activate and deactivate sport mode.
So my plan was this, press the button, which then activates the gear selector circuit and grounds the sport wire, pressing the button again deactivates and isolates the sport pin putting the car back to drive.
my initial thought were to use a voltage comparator, like an LM393, or 2 lM311 to ground the up/down directly without needing extra transistors. now, the tricky bit is setting up the reference values so that up or down is measured correctly. this is where i am out of my depth.
am i thinking about this the correct way?
Thanks, Alan
Project is this:
I have a paddle shift steering wheel i wish to fit and control the up and down shifts of a tiptronic gearbox,
The paddles have a 2 pin connection, the circuit is 270 K Ohm with the switches un activated, press down and the resistance drops to 337 Ohm, press up and the resistance is 1.01 K Ohm.
The gearbox requires to be put into sport mode (shift to left from drive, grounding sport in addition to drive wires from the gearbox ecu) once in sport mode upshifts and downshifts can be activated by grounding the relevant wire.
I also have 2 buttons available on my steering wheel which are no longer used, so i had planned to try and incorporate one of those buttons to activate and deactivate sport mode.
So my plan was this, press the button, which then activates the gear selector circuit and grounds the sport wire, pressing the button again deactivates and isolates the sport pin putting the car back to drive.
my initial thought were to use a voltage comparator, like an LM393, or 2 lM311 to ground the up/down directly without needing extra transistors. now, the tricky bit is setting up the reference values so that up or down is measured correctly. this is where i am out of my depth.
am i thinking about this the correct way?
Thanks, Alan
