Any suggestion with the questions below
Second question
The ECU has input switches you can turn off and on with a GND signal to the ECU input. You can also invert the ECU signal and connect it to 12VDC. I want to connect these signals together without using a relay. Looking for a safe/cheapest solution.
Third question
The ecu has a TPS sensor and would like to simulate it using a digital POT. The sensor operates 0v to 5v. Looking for a safe/cheapest solution to simulate it.