banging my head, 1 wire, 2 functions

Home / the12volt's Install Bay / Relays / banging my head, 1 wire, 2 functions (

Topic Closed)

Welcome Guest :)

Members

< Prev Page Next Page > < Prev Topic Next Topic >

KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: April 28, 2009 at 2:21 PM / IP Logged

In the diagram above the 3906 will turn on when a - voltage is applied and the 3904 will turn on when a + voltage is applied to the base. The transistors collector output is inversed from the base input - I'm guessing that is why you think it is backwards.

When you twist the wires together do both relays activate or just one? Is this with or without the switch wire connected? When I get home tonight I'll try to build the circuit and see what kind of results I get.

Kevin Pierson

djfearny2

Silver - Posts: 810

This member has made a donation to the12volt.com. Click here for more info.

Joined: September 23, 2002

Location: United States

Posted: April 28, 2009 at 2:40 PM / IP Logged

both relays activate, and ok ill modify the relay setup

Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

djfearny2

Silver - Posts: 810

Joined: September 23, 2002

Location: United States

Posted: April 28, 2009 at 2:59 PM / IP Logged

and ok so the 3096 needs neg to activate so shall i have that one controlling the relay that uses a negative input to negative output? cause the signals dont change the shifter is neg so i have the switch set up to throw neg and the air horns are pos so again the other switch is setup to throw pos.

Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: April 28, 2009 at 3:13 PM / IP Logged

KPierson wrote:

Yep, I messed up, sorry!

I gave you an out.

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: April 28, 2009 at 4:11 PM / IP Logged

i am an idiot wrote:

KPierson wrote:

Yep, I messed up, sorry!

I gave you an out.

haha, thanks. I guess I'm just so used to messing things up it doesn't bother me at all anymore to admit it.

Kevin Pierson

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: April 28, 2009 at 4:13 PM / IP Logged

djfearny2 wrote:

I'm not exactly sure what you are saying here. I think what you are asking is if you should run a ground through the relay that uses the 3906 because it needs a ground to switch and the answer is it doesn't matter. The coil and the contacts are completely isolate so you can run anything you want through each set of contacts.

Kevin Pierson

djfearny2

Silver - Posts: 810

Joined: September 23, 2002

Location: United States

Posted: April 28, 2009 at 5:19 PM / IP Logged

ok thanks, and if you can build the setup and see what you get and see if it stacks up to what my outcome has been.

and yes twisting the two inputs together Both relays activate.

let me ask you this..

is there a way to do this without relays as the output does not have to be high current. for either device to work properly.

Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

djfearny2

Silver - Posts: 810

Joined: September 23, 2002

Location: United States

Posted: April 28, 2009 at 5:19 PM / IP Logged

btw thanks for helping thus far.

Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: April 28, 2009 at 8:11 PM / IP Logged

I hooked it up here at home and I got the same results - it works great until you tie the bases together.

That got me looking at the diagram and we actually have the same problem - voltage is backfeeding through the top transistor out the base in to the 2nd transistor. I appologize for not catching that when I drew it up. I'll keep messing with it and see what I come up with.

Kevin Pierson

djfearny2

Silver - Posts: 810

Joined: September 23, 2002

Location: United States

Posted: April 28, 2009 at 8:28 PM / IP Logged

thanks alot keep me posted.

Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

< Prev Page Next Page >

Printable version

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

Search the12volt.com

Follow the12volt.com

Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.