Please help me with a simple circuit

[wozaa3]

Hi can anyone help me I'm wanting to build a firing system for my fireworks I think it should be quite a simple circuit but I can't quite get my head around some safety system I want to in stall I want three LED's next to the switch red (continuity between battery+ and switch keeping lamp off), yellow (continuity between switch and battery-) and green (complete continuity full system lamp on) May you please help me finish this this diagram using as a little extra wiring as possible because this is a basic diagram as there will actually be 20 lamps and switches also the lamps will be 25 foot away so I want to get away with 1+ and 20- wires between the switch and LED circuit board and lamps. So just to confirm I'm looking for help with the single lamp diagram as I will be able to repurpose it into the 20

Many Thanks
Warren

 

[Colin Mitchell]

What is the V in a circle?

 

[wozaa3]

a voltmeter

 

[cjdelphi]

Huh?

Who triggers it? You or a timer?

 

[wozaa3]

me just press the switch

 

[Colin Mitchell]

Do you have electrical igniters ?

 

[Alec_t]

Why do you have two switches in series?

 

[AnalogKid]

I understand most of it. What is the X in a circle?

ak

 

[davenn]

I understand most of it. What is the X in a circle?

ak

the lamp

 

[wozaa3]

Yes the lamp would be replaced with electrical igniters but I didn't know what the symbol was for igniters

 

[wozaa3]

Sorry two switchs in series because the first is a key operated safety switch so it can't be operated with out the key

 

[AnalogKid]

One LED directly across the battery to show that it is installed.
One LED after the safety (key) switch to show the controller is hot.
One LED after an output switch to show that the output is live.

Correct?

ak

 

[wozaa3]

No I'm using the voltmeter to so battery is installed and controller is hot.
yes one LED showing circuit live and if the rocket didn't launch it must of been a duff rocket
another two LED's to show there are no breaks in the circuit be for or after switch so I know if there any issues I know it the switch or lamp (igniter) I don't want to be following all the wires. I'm sure there's away to do it by placing a diode immediately after lamp (igniter).

 

[wozaa3]

still need help please guys

 

[elektrroda]

if you'd like to keep track circuit ( I mean continuity circuit) you must build circuit to measure current . This circuit to show when is short circuit , and when break.how is current of igniter . You give parameter of igniter.


here is simple circuit

 

[wozaa3]

Sorry for the late reply thanks that seems to of answered my original issues. Just to confirm I'm reading this correctly in this diagram your using the resistor to lower the current below the operating current of the igniter. Now I can't remember the formula to determine what ohm resistor I would need (Max 50mA).