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School Project With Circuits- What should I do? Answered

For Science I have to create an electric model on anything. The only requirements are: It must have one series circuit with one switch and three LEDs It must have one parallel circuit with two switches and two LEDS It must have three additional circuits (or more) So. This gives me quite a bit of options. Sure, I could create a car or something like that, but it seems rather commonplace and boring. I want to do some very creative and exciting, and I thought that you guys may be able to suggest some projects that I could base my project on or new ideas.


You could illustrate how to arm a nuclear missile. Series circuit - good, parallel circuit - bad. Other circuits hooked up for failsafe to disarm the warhead. Buzzers, alarms, flashing LEDs, what could be more fun? Use joysticks or make a large cockpit cutout to simulate the pilot/submariner view.

That sounds great. (Kiteman, you idea was good too :)) I searched for information about it, and couldn't find much. Could you explain the idea a little more (I know nothing about arming nukes xD) Thanks a lot :)

Do you know who will be judging or marking your work?

Think about their personality before choosing your approach - if they are into cool stuff, do the bomb. If they are concerned about getting it right, do the house.

If the judges are into cool stuff and are concerned about getting it right, alarm the house(s) with a nuclear bomb. Put switches as your window sensors and a pressure sensitive "welcome" mat to arm the alarm. There are other implications but this was just to implement the circuits.

You know, If I told you I would have to... ...from what I've seen on movies...Essentially the principle is that it takes two people to arm the missle. You get a call on the red phone that says you are authorized to arm it. The pilot must agree with the co-pilot that the message was received accurately and is valid. Pilot takes out his key, puts it in the key switch and reads some stuff from the codebook and instructions from the sealed envelope. Co-pilot repeats everything and says something like "I concur, sir..." He/She gets out their key and puts it in the keyswitch. The pilot then turns his key. Reads off the next step. Co-pilot repeats the action. Pilot hits the switch and the lights go red. Co-pilot hits the switch and the second lights go red. If they get this far, missile is armed and ready to launch barring anyone else on board trying to break into the cockpit or clipping the wires on the missile itself in the bomb bay. You can make anything look like the controls to launch a missile. Be creative and label the controls in Klingonese.

Add a large countdown digital kitchen timer for dramatic effect for the self-destruct sequence...

It's obvious you didn't have your evil mad scientist hat on.

i see flashing lights and beeping alarms. and more flashing lights.

The obvious answer is to title your project "Why are houses wired in parallel?" Make three frontless cardboard houses, like dolls houses, with the LEDs standing in for ceiling lights. One house wired up to match the first circuit, one to match the second, and a third house as a mixture (one switch works two ceiling lights in the living room, and especially two separate switches working the landing light - one switch upstairs, one switch downstairs.)

Extra credit: how to control one light using switches in three separate locations, so you can freely switch the light on and off from either location. It's not trivial, and requires a clever little hack. See if you can figure it out by yourself, before you look it up - but make sure you do Kiteman's two-switch case first.

make sure to use resistors!