Xenon Flasher

  
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This project generates 350V DC and stores the voltage in a large electrolytic. This voltage will not kill you, but will deliver a nasty SHOCK! For this reason, the project has a great benefit. It will teach you to work very carefully on equipment with high voltages and if you do get a shock, you will appreciate electricity EVEN MORE! Simply discha
Xenon Flasher - schematic

rge the 120u electrolytic with a screwdriver or jumper lead before working on the circuit. I do. I`m not silly. I don`t want to get a bite or tingle each time I pick up or work on the board. There is no reason why beginners cannot experience working on this project as it contains non-lethal high voltages and is a very good grounding for electrical safety. We forgot to mention the other high voltage produced by the circuit. As you will learn in the notes, a trigger transformer is also included in the circuit and it produces a very high voltage to trigger the Xenon tube to produce a flash. This trigger voltage is approx 2, 000 volts but since it is only present for a very short period of time, you would have to be holding the circuit at the instant when a flash occurs, to feel the spike. None the less, this 2kV is part of the circuit and adds to the fact that this project is packed with features. We start the discussion with the transistor oscillator. It`s not really a sinewave oscillator as this infers the output is a nice, clean sinewave. It`s really a blocking oscillator or pulsed oscillator or feedback oscillator or flyback oscillator as the high voltage produced by the secondary winding occurs when the transistor is switched off and the magnetic flux collapses and creates the high voltage in the secondary (also called the tertiary or "overwind") winding. For more details on the operation of this type of oscillator, see...



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