Jeezus...this is getting sophisticated! Definitely over my head, skill-wise...

Is there a voltage regulator on there too? I don't need that...I plan on using a 7805 seperately before it even gets to the circuit...
I marvel at your skills here, but I think this might be overkill?

I don't need an electronic pulse, per se, designed into this...
Yes, the relay itself needs a pulse to latch, but I can make do with a steady output as long as the switch is held. Once released, then no more output...this is perfectly fine, and simplier.
As for the output itself, all I need is just a + lead coming off the circuit...
I don't understand how the relay is integrated in your design here...
There is a LOT going on here I don't understand...
Isn't that design #3 sufficient for my purposes, minus the vreg?

I can take just a + output, run it to the + side of the latch, and run the same + lead into a grounded relay, to send a ground pulse to the latch at the same time...wouldn't that be easier? I can't have it constantly grounded, because of the polarity swap needed for unlatching...

As far as unlatching, I have another switch setup for this...which just applies opposite polarity to the relay to unlatch it...

Here is a pic of the parts...

 

hi,
There is no Vreg in any of the circuits.???

I would suggest that you post a diagram on how you see the project wired up, then I can suggest a way of meeting the requirement..

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

 

Yes...I plan on regulating the power going into the circuit with a 7805. I can easily add this to the board myself...

Have a look at circuit #2
Again, I'm unsure if the way the relay is hooked up (constant ground?) is what I need...

Circuit #3...looks like just a + output, which I can make work, like how I explained it in my last post. I just don't understand the theory with the transistors...

 

Yes...I plan on regulating the power going into the circuit with a 7805. I can easily add this to the board myself...

Have a look at circuit #2
Again, I'm unsure if the way the relay is hooked up (constant ground?) is what I need...

Circuit #3...looks like just a + output, which I can make work, like how I explained it in my last post. I just don't understand the theory with the transistors...

Hi,
Using circuit 1, 2, or 3 driven by 7805 Vreg +5V, would mean that the relay would have to a 5Vdc coil,,,, what voltage is the one you have.?

Can you post a specification of the relay and switch shown in the picture you posted.?

For Cct3 the Q1 transistor is switched ON, conducting, after the switch ON delay period has timed out, it will remain ON all the time while the power is switched on. Again with a 7805 Vreg the voltage will be under +5V from the transistor.

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

 

The button is controlling the power going thru the circuit, and outputing at the other end...it's a momentary switch, so as soon as I let go, the output ceases, correct?

Here is the data sheet on the relay...model 700-HJ32Z12

http://www.ab.com/en/epub/catalogs/1...9705/tab5.html

And more info here...
http://www.ab.com/en/epub/catalogs/1...9705/tab3.html

If the 555 can take 12v, then I also have 7812's I can use...

 

The button is controlling the power going thru the circuit, and outputing at the other end...it's a momentary switch, so as soon as I let go, the output ceases, correct? Yes thats correct

If the 555 can take 12v, then I also have 7812's I can use...

You cant regulate using a 7812 from a a 12V car battery.

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

 

I have 7812's in my car regulating LED drivers...
A running car has voltage over 14v, and even when it's off, it would seem there is enough voltage differential for the 7812 to work properly...
Anyway, I'll just use a 1/4W or 1/2W resistor then...surely this would work!

 

hi,
This modified cct will give you what you want.

1. When the switch is pushed there will be 2 second delay before the relay operates.

2. When the switch is released the power to the cct and relay is switched OFF.

3. The cct dosnt require any regulators.

The relay you have is a 12Vdc, 0.13A coil.

A 7812 Vreg requires 3V across to operate, that is to give +12Vout.

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

 

So basically, it's this...
http://www.ics-timers.com/khtimers1.html
If I can buy just one of these, then maybe that's my answer?
I don't understand all the components on your schematic

 

That looks OK.

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

 

...except I can't get a reply about buying one!
Maybe you can explain your design a little 'easier' for me to understand?
And what components are used/lables?