Audi abz V8 with 2 pin idle valve. It was working on old 3.3 board with VERY old firmware - 1.17. Was being driven with stepper output and PWM. Now I am told not to use stepper output or it will burn out, but I have no free 7amp outputs. What to do?
Quote from: smurfinator on January 11, 2017, 07:16:57 PM
Audi abz V8 with 2 pin idle valve. It was working on old 3.3 board with VERY old firmware - 1.17. Was being driven with stepper output and PWM. Now I am told not to use stepper output or it will burn out, but I have no free 7amp outputs. What to do?
use stepper as you used before :D or you can drive some fet with stepper output :)
Quote from: Kamuto on January 11, 2017, 07:50:06 PM
Quote from: smurfinator on January 11, 2017, 07:16:57 PM
Audi abz V8 with 2 pin idle valve. It was working on old 3.3 board with VERY old firmware - 1.17. Was being driven with stepper output and PWM. Now I am told not to use stepper output or it will burn out, but I have no free 7amp outputs. What to do?
use stepper as you used before :D or you can drive some fet with stepper output :)
Ok, thank you! Is there a schematic for how to drive a fet with the stepper output? Is the fet mounted outside the VEMS? I don't have any free EC output holes, if I'm reading my unit documents correctly.
Oh, also, my old version firmware had no provision to control the frequency of PWM, so I don't know which to choose. What was the default in fw 1.17? My harddrive with that information ist kaput.
Thanks!
Ben
Quote from: smurfinator on January 12, 2017, 02:25:24 PM
Oh, also, my old version firmware had no provision to control the frequency of PWM, so I don't know which to choose. What was the default in fw 1.17? My harddrive with that information ist kaput.
Thanks!
Ben
never had to play with that old software :D