Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!cwcst1
From: cwcst1@unix.cis.pitt.edu (Carol Coates)
Newsgroups: sci.electronics
Subject: Re: Making an explosion
Summary: Hehe, ahh memories :-)
Message-ID: <112163@unix.cis.pitt.edu>
Date: 6 Apr 91 08:58:50 GMT
References: <413@crystal1.UUCP> <1991Apr5.002816.2256@dcs.simpact.com>
Followup-To: sci.electronics
Distribution: usa
Organization: undecided... well, maybe
Lines: 44

In article <1991Apr5.002816.2256@dcs.simpact.com> jeh@dcs.simpact.com writes:
>In article <413@crystal1.UUCP>, jw@crystal1.UUCP (John S. Wainscott) writes:
>> I'm trying to build an explosion sound effects circuit as part of a larger
>> circuit but I can't seem to get away from using lots of parts.  The circuit 
>> is powered by 3V to 4.5V and the explosion is triggered by a CMOS gate.  I'd 
>> like there to be a slowly increasing tone (20-30sec) followed by an explosion
>> then silence.
>
>You need LOTS more voltage.  About 120V across a small electrolytic cap, 
>say one with a 12V rating, ought to do it.  A capacitor used in this manner
^^^^^^^^^^^^^^^^^^^^^^^^^^^

	Greetings. How true - make sure you have some current, too :-)

	What we did, last year (Pennsylvania has very strict fire cracker
	laws - ie. sparklers only ;-) for the 4th.

	1) Take a terminal - any will do.
	2) Take the tube out - unplug the HV (anode?)
	3) Take a 5MFD @ 5000V (or 2 :-)
	4) Power up the terminal (look out for the sparks)
	5) Ground one terminal of the cap and (momentarily) attach
	   the HV to the other.
	6) Take the largest Craftsman flat screwdriver you can find.
	7) Put on your safety gogles and SHORT THE TERMINAL!

	BBBBAAAAMMMM!!!!!!

	Oh, so you need CMOS to control the thing... well, there is
	such a thing as a "relay" :-)

	Take care.

	P.S. I joke you not. 

>is referred to as a NED -- Noise-Emitting Diode.  
                            ^^^^^^^^^^^^^^^^^^^^^
				That's cute :-)
>
>(seriously -- 'round fourth of july, we used to put capacitors out in the
>middle of the street (a cul-de-sac), attached to clip leads at the end of a
>*long* extension cord.  Plug in the cord and.... the exact result would depend

	That's fine.... but you need a new one every time.... ;-)