Need a momentary 12V output

Thread Starter

yazen

Joined Jul 11, 2011
24
Vb is direct 12V power that goes to the relay wiper contact.
Vdd is filtered power that goes to the relay coil (Vdd node) and power for the CD4093.
Thank you for the prompt response.

Did I finally get it!? LOL

If you look at the picture attached, can I connect all the grounds (what I highlighted in green) together, then ground one only?

Both relay output goes to the mirror flip switch button?

vdd goes to vdd like I drew in the picture? same for vb?

Thank you once again,
Yazen
 

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crutschow

Joined Mar 14, 2008
38,526
can I connect all the grounds (what I highlighted in green) together
Yes.
Both relay output goes to the mirror flip switch button?
No.
I would have shown that if it did.
Out goes to the Switch output (pulse to window motor).
The other relay output is left unconnected.
vdd goes to vdd like I drew in the picture? same for vb?
Yes.
Vdd also powers the CD4093.
 

Thread Starter

yazen

Joined Jul 11, 2011
24
Yes.
No.
I would have shown that if it did.
Out goes to the Switch output (pulse to window motor).
The other relay output is left unconnected.
Yes.
Vdd also powers the CD4093.

Thank you!

The button to flip the mirrors has two wires, how would I know which one is the pulse one? any suggestion/advise?

Thank you,
Yazen
 

ElectricSpidey

Joined Dec 2, 2017
3,335
Please see post #11 & 13

I don't think you want to connect the battery to either of the switch connections, you simply want to use the relay as dry contacts.

i think the schematic should be corrected to avoid the confusion, maybe something more conventional and not a sim schematic.

Again, I wouldn't use the relay to apply the battery positive to either one of the switch contacts, unless you are very sure that the switch is high side and you know for sure which terminal to connect to.
 

Thread Starter

yazen

Joined Jul 11, 2011
24
Please see post #11 & 13

I don't think you want to connect the battery to either of the switch connections, you simply want to use the relay as dry contacts.

i think the schematic should be corrected to avoid the confusion, maybe something more conventional and not a sim schematic.

Again, I wouldn't use the relay to apply the battery positive to either one of the switch contacts, unless you are very sure that the switch is high side and you know for sure which terminal to connect to.
Thank you.

As far as I know, the switch contacts send low pulse data to the BCM. Won't thr BCM gets damages if I send positive voltage to it through the relay?

Can I use a different type of relay that wont send power, but it simply completes a circuit momentary, kinda acts like the switch?

Thank you,
Yazen
 

crutschow

Joined Mar 14, 2008
38,526
As far as I know, the switch contacts send low pulse data to the BCM.
How many wires are connected to the switch and where do they go?

You could likely use the relay contacts in parallel with the switch contacts to duplicate the closing of the switch.
 

ElectricSpidey

Joined Dec 2, 2017
3,335
Thank you.

As far as I know, the switch contacts send low pulse data to the BCM. Won't thr BCM gets damages if I send positive voltage to it through the relay?

Can I use a different type of relay that wont send power, but it simply completes a circuit momentary, kinda acts like the switch?

Thank you,
Yazen

Yes, that is exactly what I described.

You don't need a different kind of relay, you just need to wire it differently from the schematic.
 

ElectricSpidey

Joined Dec 2, 2017
3,335
How does a "conventional" schematic differ from a sim schematic?
Perhaps "conventional" was the wrong term to use.

Example:

The voltage source used to represent the ignition switch might not be understood by a noobie especially since there is no switch shown in the schematic.

I can tell by the questions that the OP cannot fully understand the schematic.
 

Thread Starter

yazen

Joined Jul 11, 2011
24
How many wires are connected to the switch and where do they go?

You could likely use the relay contacts in parallel with the switch contacts to duplicate the closing of the switch.
Two, they go to bcm.

Can you please explain how to use thr relay in parallel?

Thank you,
Yazen
 

Thread Starter

yazen

Joined Jul 11, 2011
24
Perhaps "conventional" was the wrong term to use.

Example:

The voltage source used to represent the ignition switch might not be understood by a noobie especially since there is no switch shown in the schematic.

I can tell by the questions that the OP cannot fully understand the schematic.
That is right. I am completely new to this.

Appreciate all the support and guidance.

Thank you,
Yazen
 

Cwoo

Joined Feb 21, 2022
2
This circuit should also be very useful for rolling down the windows slightly to make closing doors easier. My car is pretty air tight and I need to slam the door to shut it.

My question is, what do I change to adjust the duration time? I would want to tune it to give the right amount of air gap.

Also is it possible to make the closing of the windows slightly longer duration to ensure it is always closed tight over many repetitions?
 

Cwoo

Joined Feb 21, 2022
2
I would want to connect this to the door switch instead of accessory/ignition on.

My window switch has 2 sets of contacts, roll up and roll down, that need to be closed. How would I connect it?

Thanks!!
 
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