#128 making a simple energizer

Since I’ve been living in a rural area for the past few years I’ve had to come up with some affordable solutions to problems unique to my situation. One of these problems is keeping animals out of certain areas with methods that wont cause permanent harm but will definitely be effective. So the logical solution was to use electricity in the form of electro shocks. I searched for commercial solutions and found a few but they were a bit overkill/overpriced and of course not very hacker friendly… so I decided to make my own which I can always scale up with microcontrollers/relays/monitoring and all those nice to have features but for this one I wanted it to be plain old dumb without any programming required.

So I did my research and came up with a suitable schematic found the correct parts and settled on the good old 555 timer. Designed a very small PCB and got it manufactured a voila the idea became a reality and after a few tests it works perfectly fine.

Now the shock is created by the collapsing fields of the ignition coil I used for the project. I got the most basic simple coil that is driven by a suitable N-FET at a frequency and strength that I can fine adjust via a potentiometer on the PCB. The whole system runs on a 12V battery and consumes very little current.

I took inspiration for this device and modified and created my own flavour. Like everything in life no one can do everything by themselves so I would like to credit the source which got me started here.

With that being said I had a lot of fun making this device and it’s been working well I was also able to adjust the voltage to a very humane jolt so smaller animals know not to enter the area but also don’t get fatally hurt.