# Would this work?

### Help Support The Rocketry Forum:

#### 11bravo

##### Well-Known Member
I'm not much of an electrician and less of a schematistician.
Would this work for a launch controller?
Would I need some other electrical thingees to get the current to flow where it is needed? Or something like that.
More complicated than necessary, but looking for a bit of a cool factor.
Idea is-
1. put the key in and turn it, yellow light comes on.
2. flip the switch and the red light comes on.
3. push the two buttons and the rocket goes bye-bye.
Have to have the key turned and switch flipped to be able to launch.
Can use the test light to test the controller and the launch cables.
Not sure what to use for batteries, probably 12 volt.
Maybe a sealed gel cell, or just two of the square 6 volt lantern batteries.
Be housed in an old ammo can, that will hold batteries, board, and rolled/wadded cables.

Thanks for any help,
Greg

#### goose_in_co

##### Well-Known Member
Greg,

Just a couple of thoughts.

First, with the double pushbutton, the arm switch is a little redundant, I think that the main key switch would be enough, that is unless you like seeing the lights .

Second, there is no continuity check in your diagram. Without a continuity check you have no idea if your ignitor is connected.

You might want to search on other launch controllers and see what they have done for a continuity check

Goose

#### 11bravo

##### Well-Known Member
Continuity check you say? Hhmm. Hadn't thunked of that.
Will do.
Redundancy?
Yeah I know, but-
1. have the parts laying around
2. lots of switches and lights increase coolness
3. I really don't like things happening before I want them to

Thanks for the input,
Have a good one,
Greg

#### Steward

##### Well-Known Member
The controller I built ... when you turn the key. the continuity light(green) comes on... then you just push the fire button to launch...

Then again... if I had them I would probably wire a bunch of lights into it... Heck... everyone like lights...LOL

#### goose_in_co

##### Well-Known Member
greg,

since you have a lot of switches, how about using one of the momentary ones for a continuity check? That adds another switch and light/buzzer. Also you could add a warning buzzer on the arming switch, that would give you a positive indication of being ready to launch, and be really obnoxious so that you don't leave it on long...

the two 6V batteries would probably work fine. I have had