« previous next »
Pages: 1 [2]

Author Topic: Idle valve blew a step driver?????  (Read 17298 times)

Offline smurfinator

  • Full Member
  • ***
  • Posts: 127
  • BHP: -20
Re: Idle valve blew a step driver?????
« Reply #15 on: January 09, 2009, 12:11:04 am »
Quote from: lugnuts on January 08, 2009, 11:25:23 pm
Sorry for the basic question, but I was un-aware the Stepper outputs could even pull a ground?

I thought when you invert the output, it changed OFF to ON, and vise versa??? Am I nutty?

Beats me.  I just do what smarter guys tell me to do.
Logged
Audi ABZ 4.2 V8 in 1993 90 quattro
TTV 60-2 flywheel and cam sync
firmware: 1.2.20

Smurf blue (BMW Laguna Seca), hence the name!

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: Idle valve blew a step driver?????
« Reply #16 on: January 09, 2009, 03:16:23 am »
Stepper chips output consist from two opposite transistors: NPN and PNP. So it can pull to Ubatt and also to ground.
Logged
Pages: 1 [2]
« previous next »