Higher voltage -- ENDed

Comments

• Beau Schwabe Posts: 6,572

  2010-04-12 15:20 edited 2010-04-12 15:20

  PJ Allen,
  
  Wouldn't the use of TOGGLE be more effective than PULSOUT ?
  
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  Beau Schwabe
  
  IC Layout Engineer
  Parallax, Inc.
  
• erco Posts: 20,261

  2010-04-12 16:04 edited 2010-04-12 16:04

  PJ: You had mentioned "Taser" in the other HV thread. I built a BS1 game with a mild shocking circuit. Low-tech, it used but VERY effective. The BS1 buzzed a relay (~5 Hz) to switch pulsating DC from a single C-cell (1.5V) through the 6V secondary of a cheap Radio Shack filament transformer. High voltage (a good tingle) came out of the primary side, routed to metal contacts on the game controllers. Input voltages higher than 1.5V give proportionally higher output shock voltages.
  
  I found out pretty quickly that most people (including big strong macho guys) refuse to play if they know a shock is coming. Best to keep it a surprise. The thrill of discovery awaits!
  
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  ·"If you build it, they will come."
• Beau Schwabe Posts: 6,572

  2010-04-12 17:42 edited 2010-04-12 17:42

  PJ Allen,
  
  The use of TOGGLE will just make the output wave more symmetrical ... i.e. 50% duty which I think is what you really would want.
  
  
  
  
  
  As far as 'taser' goes, I wouldn't call it that, but you can gain a respectable more effective 'punch' from a charge pump design rather than directly pulsing from a battery.
  
  Here is a patent document with the information you need.
  www.google.com/patents/about?id=sCEKAAAAEBAJ&dq=6500210
  
  page 5 of the PDF shows a basic circuit... the SK3950 is just a basic SCR ... The SK9442 can be omitted and the Collector terminal can be tied directly to ground. The circuit basically charges a capacitor and when the trigger threshold (set by a voltage divider) of the SCR is met, the capacitor is discharged into a tiny pulse transformer and the cycle starts all over again.
  
  page 9 of the PDF shows a way to gate the SCR to allow frequency control. i.e. from a Stamp or Propeller
  
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  Beau Schwabe
  
  IC Layout Engineer
  Parallax, Inc.
  
  Post Edited (Beau Schwabe (Parallax)) : 4/12/2010 5:54:48 PM GMT
• Beau Schwabe Posts: 6,572

  2010-04-13 02:52 edited 2010-04-13 02:52

  PJ Allen,
  
  I understand the concept "Once the Art Dept got hold of the schematic all bets were off.", it's happened many times to myself, but what mags are you referring to that are buggy?
  
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  Beau Schwabe
  
  IC Layout Engineer
  Parallax, Inc.
  
• mctrivia Posts: 3,772

  2010-04-13 04:07 edited 2010-04-13 04:07

  erco i have one of these fun but you are right people don't want to play once they realise they may get a shock.
  
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• Sujana Posts: 1

  2010-04-13 20:09 edited 2010-04-13 20:09

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