Gandledorf
New Member
As an exercise, to see if I actually understand some of the things I've been learning from all of the wonderful help I've been recieveing here (and I cannot thank you enough for it), I tried to first: A, figure out exactly why the stun gun on the projects page works (mainly because of the transformer), and B, redesign the schematic for use with a uC.
Here is my result, could someone please "grade" me on my understanding of this exercise, and point out my mistakes (which I am sure I made).
**broken link removed**
In the original circuit, the 555 timer was set to generate a pulse of around 60, or 220Hz, depending on the capacitor (whether it was .1uF or .47uF respectively), which drove the transistor, causing the transformer to step up the voltage by a factor of 200, from 9V to 1800V (minus some loss), and step down the current to 1/200 of it's original value (which was what? I couldn't find a current limiter).
In my version, I take a 9V battery, and run it through a 5V regulator. My processor is switched on and generates a 60Hz signal when the trigger is depressed. This signal is run through a current limiting resistor, and then through a transformer, where the voltage is stepped up by a factor of 230 to 1150V, and the current is stepped down by a factor of 230 from 2.5mA to .01mA. A 1M pot on the other end can be used to vary the voltage between 1150V and 10V.
Here is my result, could someone please "grade" me on my understanding of this exercise, and point out my mistakes (which I am sure I made).
**broken link removed**
In the original circuit, the 555 timer was set to generate a pulse of around 60, or 220Hz, depending on the capacitor (whether it was .1uF or .47uF respectively), which drove the transistor, causing the transformer to step up the voltage by a factor of 200, from 9V to 1800V (minus some loss), and step down the current to 1/200 of it's original value (which was what? I couldn't find a current limiter).
In my version, I take a 9V battery, and run it through a 5V regulator. My processor is switched on and generates a 60Hz signal when the trigger is depressed. This signal is run through a current limiting resistor, and then through a transformer, where the voltage is stepped up by a factor of 230 to 1150V, and the current is stepped down by a factor of 230 from 2.5mA to .01mA. A 1M pot on the other end can be used to vary the voltage between 1150V and 10V.