Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!zephyr.ens.tek.com!tektronix!gvgpsa!gold!grege From: grege@gold.GVG.TEK.COM (Gregory Ebert) Newsgroups: sci.electronics Subject: Zap, fry, and sizzle Message-ID: <799@gold.GVG.TEK.COM> Date: 21 Feb 90 22:03:18 GMT Organization: Grass Valley Group, Inc., Grass Valley, CA Lines: 70 Does anyone out there have some firsthand experience in destroying various electronic items for sick-minded amusement ? I would like to share some of mine and hear from others. CRT's : From TV's/monitors. Wonderful implosions if dropped into an open manhole or thrown inside a storm-drain tunnel. Vociferous THUD. Must drop on face. 25" color tubes are the best ! Once i chucked one into a concrete ditch, face-first, with 1-1/2" water. IT DIDNT BREAK ! Light bulbs & tubes : Similar to above, but have short POP followed by tinkling sound of glass. Sometimes emit small cloud of sparks if done in the dark. Light bulbs can be subjected to perversely-higher-than-normal voltage which results in the 'Xenon Effect'. Can also apply normal voltage, allow to heat, and dunk in water; makes a good 'Splort' sound. Fluorescent tubes : Best if thrown like a javelin. Very loud if stood upright and allowed to fall on hard surface. Capacitors : Alltime favorite. Just make sure the applied voltage (usually 120 VAC) is 3+ times greater than the WVDC of the victim. Nice sparky explosion with smoke. One drawback to large (>1000uF) caps is that they pop the circuit breaker. Especially nice if you have 220/50A service. DON'T USE 'AC' CAPACITORS UNLESS THEY ARE MARKED 'NO P.C.B.'S'. Polychlorinated Bi-phenyls (PCB's) are an extreme environmental hazard. IC's : Nice pop with good orange/blue flames. Static memory chips are the best. Batteries : If you are patient, alkaline and zinc-carbon cells are quite amusing. Best to use a variac rated at 10+ amps and adjust from 0-120 VAC. Fresh batteries smoke and sizzle, while 'dead' batteries put-out nice green/blue/orange fireworks along with ample amounts of smoke. One victim popped out of its case with a loud 'suction-cup' noise. Still to be investigated are lead-acid and NiCd species. Resistors : Up to 10K-ohms and under 1 watt are susceptible to 120VAC. Depending upon value, they will heat-up, discolor, smoke, and flame-out, sometimes with a pleasant 'Bzzzzzztttttt-Phuffff' sound. Motors : No luck so far. Have tried running 60hz 3450 RPM motor at about 190Hz (~11000 RPM). Really screams. Desired effect was to cause armature to fly apart. Problem is that higher frequency operation requires higher voltage. To be investigated further this summer. Special case: Vacuum cleaner motors can be placed over a shallow pan of gasoline and energized. Can get 6-8 foot flame tower. Water and salt-water doesn't produce desired effect. Speakers : Ignite while playing music by Twisted Sister. Can also connect to lo-freq (5-20Hz) oscillator and use as a 'shake table'. Once, while 'inebriated' in a microprocessor class at UCLA, I filled it with wine-cooler and gawked at the various patterns while the speaker was driven by a radio tuned to KMET (Ah, yes, the MIGHTY MET 94.7, now defunct thanks to yuppies). Transformers : Remove iron core, unwind and tie one end across street. Hold bobbin with screwdriver, et-al. Wait for car. Good vibrating WIZZZZZZZ shakes your whole body while it unwinds. Leftover 'E' cores make so-so judo stars. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -