In Reply to: Re: need circit diagram for a pulse generator for a trigger transformer posted by fishbolb on 02/02/03 at 2:03 PM:
Hello again. Re "cattleprod" type circuits, there are literally dozens of versions. I am E-Mailing you an attachment "elecpost" which is a "shocker" system which I use to keep squirrels and racoons from climbing up the pole which holds my birdfeeder.
The circuit is probably not what you want but will give you a sense of what can be put together. You may require battery operation, you may require the final device to be very small, you may have existing components on hand which you want to use -- the variations are endless. An old electronic camera flash unit can provide a number of useful parts some of which can be difficult to find normally. In the "Postshocker" circuit, the auto-type coil can be replaced with an audio output transformer (something in the 3 to 5 watt size, 5000/8 ohm matching) with the 8 ohm winding substituting for the shorter winding and HV being taken from the 5000 winding. A really potent transformer is the flyback transformer from an obsolete 14" TV or computer monitor. The degree of "shock" is a function of size of the timing capacitor (1.5 mfd) in the diagram. Larger values will provide a more powerful shock, since the pulse width will be wider, but current consumption will also go up. Anyway, take a look, and if there are any points of interest you want to clarify, or if there are other factors not being considered, please advise.
Please take great care when experimenting with this type of circuit as the voltages produced can be extremely dangerous.