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9 volt duracell to 100,000 volts?
Posted by mike bolonose on 11/11/2003, 10:05 am I was told that a step-up transformer was required but I can't see one listed anywhere. thanks.
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Re: 9 volt duracell to 100,000 volts?
Posted by Bert Hickman on 11/11/2003, 11:15 am, in reply to "9 volt duracell to 100,000 volts?" Hi Mike, It is indeed possible, but it takes more than just a transformer. For example, most stun guns use an oscillator (called an inverter) to transform the battery's DC voltage to an AC voltage which then drives a small step-up transformer. The output is changed back to DC in order to charge an electrolytic energy storage capacitor to a moderately high voltage (say 350-450 volts). The inverter circuit is similar to the charging circuit used in an electronic flash circuit for cameras. The fully charged capacitor is then suddenly discharged into the primary of another high voltage step-up transformer (called a pulse transformer) using a transistor or SCR switch. This generates a high voltage pulse on the output of the HV transformer. Most stun guns output tens of thousands of volts - an any ads indicating 300-500 kV handheld units are simply advertising garbage. However, by using a large capacitor and a suitably designed oil immersed HV pulse transformer or a high performance ignition coil (HEI, Accel, Malory), 100,000 volts can easily be achieved from a small 9 volt battery. The output will not be a steady 100,000 volts, but instead will be in the form of high voltage pulses or spikes. And the pulses may only occur every 5-20 seconds since the HV capacitor must be recharged between shots. Be aware that many communities have made stun guns or stun devices illegal. And please remember that high energy pulse circuits have the capability to severely shock or even kill you. So, if you are not familiar with high voltage and electronic design, do NOT make this your first (or your last?) electronics project. Following is a site that shows some schematics for a number of styles: -- Bert --
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Re: 9 volt duracell to 30000 volts?
Posted by hamed on 7/24/2004, 6:22 am, in reply to "Re: 9 volt duracell to 100,000 volts?" --Previous Message--
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Re: 9 volt duracell to 30000 volts?
Posted by Chris on 11/27/2009, 11:14 pm, in reply to "Re: 9 volt duracell to 30000 volts?"
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Re: 9 volt duracell to 30000 volts?
Posted by Bert Hickman on 11/27/2009, 11:51 pm, in reply to "Re: 9 volt duracell to 30000 volts?"
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