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Active Contributor

Join Date: Mar 2008
Posts: 16

Alarm Switch

03/08/2008 11:13 AM

I don't know why my previous post was deleted. i couldn't even find it, and if it was, I'd like to know why.

As I was saying, I needed help to make a timed switch, in other words, attaching an digital watch to a circuit, so that when the alarm goes off, the circuit is turned on.

I've googled it up, but couldn't find anything helpful. Its for my own project, I'm a civil engineering student so I know almost nil about electrical engineering (it was a wonder that I even managed to understand the circuit my friend made for me).

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This discussion was "closed" on 03/08/2008 11:04 PM. No new comments are allowed.
Anonymous Poster
#1

Re: Alarm Switch

03/08/2008 11:30 AM

What's the project?

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Active Contributor

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#2

Re: Alarm Switch

03/08/2008 11:43 AM

Well, this is gonna be embarrassing, but its for my invention, the Wake-up Shock, it basically will shock people so that they'll wake up if they're sleeping. I've designed the shocking part, just a jumble of capacitors and transistors (it feels like a red ant's sting, only twice the pain) but I can't get the alarm part to work.

I bought a cheap digital wrist watch and wanted to use it as the watch, but I don't know how to attach it so that when the alarm goes off, the shocker is turned on, and when the alarm is turned off, the shocker is also turned off.

I wanted to use a 555 timer for the shocker, so that it'll only shock once when the switch is turned on, but do people wake up from just one shock...

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Guru

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#3

Re: Alarm Switch

03/08/2008 12:27 PM

Z,

I don't know about anyone else, but this is a circuit I'm uncomfortable with.

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Active Contributor

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#4

Re: Alarm Switch

03/08/2008 12:44 PM

Tell me about it. Everyone I explain it to kinda freaks out. They were like "are you sure man" or "this tells a lot about your state of mind".

Anyway, I already submitted it and come heaven or hell, I'm gonna finish this thing, or the guys in my group are gonna kill me.

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#5

Re: Alarm Switch

03/08/2008 12:44 PM

The only good time to shock someone is when their dead and it may bring them back to life. What you ask some one to do here is give you help on a device that could cause some one harm. No thanks.

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Active Contributor

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#6

Re: Alarm Switch

03/08/2008 12:54 PM

Its not like the shock could kill. Its only a tiny shock (like an ant) and I don't think anyone would want to wear this thing.

I just need to finish it and submit it, not market it or something. I'm bordering on desperation here, as people usually choose an easy project (like a spring-equipped chopstick or something) but I made the mistake of proposing an electronic device. So, I'm dumb, sue me.

It just need to work one time (for the demo) and thats it, nothing more.

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#7

Re: Alarm Switch

03/08/2008 12:56 PM

Apparently the mods had a problem with a previous such post. I understand why. I'm not going to help you with this, and I don't think anyone else should.

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#8

Re: Alarm Switch

03/08/2008 1:15 PM

Zul,

look here. Not voltage kills people but current. Every person has individual perception to dangerous level of current. Level of 10-20 mA is recognized as dangerous for life (no matter voltage). So leave your project.

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Active Contributor

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#9

Re: Alarm Switch

03/08/2008 1:30 PM

If that's the case, I'll keep on hoping that someone will point me in the right direction.

Or else, I'm gonna have to figure this one out myself. It'll add to the long list of skills that will be useless to me once I'll graduate, but what can I do?

You guys don't happen to know how to build a condensed pulse alternator, do you? Ok, that's off topic, but still, just a hint? I don't think its hard, right?

I could refer to the lecturers in my university, but its too much of a hassle, and my schedule is too busy as an active freshman, so I don't have the time to set up an appointment.

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Anonymous Poster
#10
In reply to #9

Re: Alarm Switch

03/08/2008 10:41 PM

Z,

I too am very uncomfortable with your request, especially in this day and age...come on. Choose another direction.

No help will be given here.

end of line.

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Users who posted comments:

Anonymous Poster (2); caramba (1); ozzb (1); Silas Marner (1); TVP45 (1); zultekmilennia (4)

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