Half a croissant, on a plate, with a sign in front of it saying '50c'
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Privy-C-4

Smartphone public restroom privacy protection peripheral
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Privy-C-4 is a smartphone peripheral that you can attach to the inside of a public restroom doorknob so that anyone trying to enter, broken lock or no, will get 5mA.

I know this can work because I just went running with a pair of broken earbuds. Zap.

JesusHChrist, Mar 29 2015

http://en.wikipedia...iki/C-4_(explosive) [hippo, Apr 24 2015]

[link]






       [+] 5mA will do squat. I'm surprised/skeptical that you would even feel it.
FlyingToaster, Mar 29 2015
  

       We were deeply disappointed with this, as the title suggested a combination of conformable explosives and plumbing fixtures.   

       What a let-down to discover it's nothing more than a joy-buzzer for a door, which is Baked and WKTE.   

       A tiny low-lethality Claymore-type device would get a bun - not this.
8th of 7, Mar 29 2015
  

       // 5mA will do squat. I'm surprised/skeptical that you would even feel it.//   

       Wrong. In fact, not even right. I know we're going to get into the "it's not the voltage it's the current" argument here, but I'll try to take it slowly.   

       The resistance of the human body (from, say, fingertip to fingertip - which is basically the resistance of two layers of dry skin) is around 100kOhms. Thus, to produce a current of 5mA needs an applied voltage of V=IR = 0.005 x 100,000 = 500V.   

       I can assure you that 500V is quite a deterrent. I can also assure you that the resulting 5mA passing through any important parts of the human body can do quite a lot of harm.
MaxwellBuchanan, Mar 29 2015
  

       smartphones don't generally generate 500V.
FlyingToaster, Mar 29 2015
  

       And therein lies the problem.
MaxwellBuchanan, Mar 29 2015
  

       //smartphone profiterole//   

       Wait - I missed that part of the technology stack where you swipe the screen and whipped cream comes out of the side. Where can I get some?
pertinax, Apr 05 2015
  

       At your local Dunkin' Phonuts, of course ...
8th of 7, Apr 05 2015
  

       You could use low voltage and 5MA. There wouldn't be much of a shock, but I'd expect the doorknob would be quite warm.
bs0u0155, Apr 06 2015
  

       The idea seems doable – electric gag “joy buzzers” disguised as cigarette lighters have been arount since the 1960s, at least.   

       // I know this can work because I just went running with a pair of broken earbuds. Zap. // I started getting irksome ear canal zaps a few months after my company-provided cellphone was changed from a Blackberry to an iPhone. I’m unsure what’s causing it, and why the Apple corded earbuds do it, while the Blackberry ones, which at a glance seem different only in color, didn’t. At first, I though the tiny speakers were shocking me, but later, noticed it happened inside in low humidity when I wore fuzzy slippers, leading me to believe it’s static electricity traveling over cords’ insulation.
CraigD, Apr 20 2015
  

       // smartphones don't generally generate 500V//
The ones with xenon flashes most certainly do
AbsintheWithoutLeave, Apr 24 2015
  

       // leading me to believe it’s static electricity //   

       No, it's a known side-effect of Apple Corp.'s Moron Intensifier Ray, whith which they brain-rinse* iphoney users into paying extraordinary sums of money for their inferior, bloated, overpriced crap.   

       *Iinitially they tried brain-washing, but quickly discovered that if an apple user's brain is given a thorough wash, when it's subsequently dried it just floats away on the breeze ...
8th of 7, Apr 24 2015
  
      
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