There's a lot of info in the Ampera service manual that is floating around. I was interested in that valve as well so I pulled the relevant pages out. Attached.
Nice excerpt, i see it uses a 12V as working voltage and 5V for control signal.There's a lot of info in the Ampera service manual that is floating around. I was interested in that valve as well so I pulled the relevant pages out. Attached.
Only very tenuously related, but the Tesla coolant pump I'm using wants a 2 Hz PWM control signal. Maybe there's some benefit to very low PWM frequencies for these low speed control requirements.Nice excerpt, i see it uses a 12V as working voltage and 5V for control signal.
I am not sure what kind of signal is required. I would try PWM 1kHz and vary....
Thanks @Swoozle did not expect the input would be that perfect!
I'm quite sure I would not have been able to figure that out by trail and error.
I used my Arduino Mega and a PWM frequency of 980 Hz building on the recommendations and it works like a charm!
Duty cycle 75% = link position = flow from top to bottom outlet and 3,3V on sensor signal pin (#4)
Duty cycle 25% = bypass position = flow from top to right outlet and 2V on sensor signal pin (#4)
Top/bottom/right as per attached photo.
View attachment 110933
Thanks!In my view simple is good.