question about a circuit.

masonn999

im just wondering would somone be able to tell me if i want to have a charge come from a battery that has a momentary switch, is there a way i can boost the power further down the conection.... so its 2 wires comming from a circuit, can i add more power after the circuit and switch while making it so there is no charge until the button is pressed.

ted1

Not exactly sure what your asking. But it sounds like you could use a relay. Trigggered by first switch. Can you explain.better.

pieface_ie

As ted1 said you will need to explain it better, placing capaitors in the circuit will boost power.

masonn999

sorry about the lack of detail, its a basic set up with 2 9v batteries an on/off toggle switch and a momentary push button, what im trying to ask is there a way to conect another battery after the button but that doesnt cause a charge to the end, like if i put an led at the end of the wires comming from the button i want to add another battery to boost the charge without having a constant charge to the led.. i kinda got an idea but not sure if itd work so maybe forget inital question would someone be able to tell me if i have a battery on one of the 2 wires comming from the button would it only work when i push the button? let me know if the rushed diagram i have posted helps you understand what im asking. thx for the help.

5uspect

You're really not being clear, masonn999, and your posts are very difficult to read when you don't use any formatting.

By charge do you mean voltage?

You have a circuit driven by two 9Vs in series. That circuit powers something and you want a push button to add another 9V in series to the existing 18V when, and only when, it is pressed?

You could simply connect all three batteries in series and add a suitable resistor to drop the voltage to 18. Then connect your push button in parallel with the resistor.

DublinDilbert

Do u want to keep the led on after the push button is released? If so for how long?

You could use a capacitor to power the led for a short time after the switch opens...

ted1

Your so not clear. Why do you need 18v at the start , what's your end requirement. You can use a transistor to switch in a new supply you could use a resistor, you could use a relay,so many ways to skin a cat.remember voltage is only potential, current is what matters

masonn999

ok can see im not very good at describing what im trying to achieve. the end result is ment to me an ignighter for lighting smoke and flash grenades for paintball. the led stays on when the toggle switch is set to on to indicate that there is power the button is to release a charge down the 2 wires to a filament (nichrome wire) that is wraped around the fuses, what im trying to do is add another batery on the wire that leads down to the nichrome that will add more power close to the fuse when the button is presed.

5uspect

masonn999 wrote: »

ok can see im not very good at describing what im trying to achieve. the end result is ment to me an ignighter for lighting smoke and flash grenades for paintball. the led stays on when the toggle switch is set to on to indicate that there is power the button is to release a charge down the 2 wires to a filament (nichrome wire) that is wraped around the fuses, what im trying to do is add another batery on the wire that leads down to the nichrome that will add more power close to the fuse when the button is presed.

Paragraphs are your friend. Your posts are extremely difficult to read.

So you need a low power circuit to power the LED to show that the system is armed. Then build a second high power circuit to fire the fuses and trigger it with a relay.

Why mess about with when all you want to do is trigger a large current elsewhere with some shiny lights for feedback?

DublinDilbert

Don't even consider using 9v pp3 batteries for this, they can supply Feck all power.

I would imagine a 12v alarm battery would be much better. Get a 12v led too (no series resistor needed).

Come from the + terminal of the battery, to the toggle switch, then to the + of the led, then to your push button. The other side if the push button feeds + to the load. All - connections should be common.

I think your obsession with adding extra 'power' is cause you were using pp3 batteries!!

spideog7

It looks to me like that circuit should do everything you want it to do without the extra battery. I'm not sure what sort of voltage you're igniter needs but 18v should be more than enough, I've seen those model rocket igniters fired using a couple of AAA but I'm not sure exactly how many, definitely not enough to make up 18v. I also doubt that a 9v battery can't supply enough current, measure the resistance of the igniter with a multimeter for a start.

If you're adding the extra battery because you have an exceedingly long cable and you're worried about losses in it then what you're asking could be done using a transistor and the battery on the igniter end, just use your push button to turn on the transistor. Of course you could also use a similar circuit with a simple wireless transmitter, but now I'm just getting carried away