In a car with a diesel or gas engine, the engine produces vacuum which is used to boost the brake pressure so that you don't have to press the brake pedal so hard.
When I remove the enging there will be no more vacuum so I have replace that with something else.
So, I built a brake booster from a vacuum pump and vacuum sensor from an Audi A4, an old Sigg bottle that I used to have kerosene in for an outdoor stove, a contactor and the Arduino micro processor.
I use the Sigg bottle because it is red ;) and because it is aluminum. Since the car is made mostly from aluminum I want as much of the parts to be so as well.
The Arduino runs a very simple software the reads the pressure and turns the pump on and off between 600 and 800 mbar of vacuum.
The contactor, which is actually the security contactor that will be used to brake the high current circuit, will be replaced with simpler 12V automotive relay.
Have a look at the video:
