23 February 2015

RID-O-RAT Homemade Electronic Pest Control Device

This is my homemade rat zapper that I was forced to make a while back because I had a problem with 2 rats that found their way into our home, chewed up ...

in today's video I'll be showing you a

circuit that I put together which utilizes the high-voltage Joule thief circuit that I have in my video playlist the one that uses a toroid if you'd like to check that out the one that I'm referring to is located in the link you see right here what you're looking at is a high voltage charging device inside this housing is the high-voltage Joule thief circuit now if you apply three volts to that circuit you can generate three to four hundred volts easily which would illuminate the neon lamp you see right here as is shown in the other video powered by a one a six 500 lithium-ion cell inside here is a simple lm317 T circuit that has a maximum voltage output of four point one eight volts and I also limited the current which would be charging the one eight six five volt battery by using a low value resistor on the output of the lm317 t circuit i also have right they'll push it you can see come on this is a battery indicator this one here is a reference and this one here indicates the battery charge when you press the button when this one gets dim that indicates the battery is getting weak when the LED goes completely off what

happens that indicates the battery is three volts or lower and it's time to charge now this circuit does not draw a lot of current and I'm going to show you why in a minute you're simply charging up capacitors and then you discharge them what I did is I took the high voltage Joule thief the output and I connected up a UF four zero zero seven which is an ultra fast rectifier diode to the output this way I have direct current leaving the Joule thief and what it does it goes into two 250 volt five hundred and sixty micro farad capacitors now the capacitors I found inside of an old cathode ray television set and be cause this circuit charges up to 500 volts I needed to connect both of those capacitors inside here in series so I end up with a 500 volt capacitor rated at half the value so it's 500 volts at 280 micro farad across the capacitor output I place this neon lamp with a 100k current limiting resistor when I push this button right here that lets me know if these two terminals on the end have sufficient voltage to injure you when you push this button if it doesn't come on that means it's lower than 60

volts across the terminals when I turn on the switch on this side of the unit here what happens in about 4 to 5 minutes the Joule thief will charge up the capacitors to approximately 500 volts DC once it's fully charged I can then turn off the switch I could position the unit where I want to position it and then I can connect it up to the base where the rat would be feeding from which I'll show you momentarily now if I use this at night and nothing happens no rat ended up on top of the pad that I have what I have to do is bleed off the excess current so what I did is I added this button right here when you push that in and you hold it there is a 5 watt 1000 ohm resistor which connects across the two output terminals so I bleed off the current this way it's safe and as I'm holding this button down and I'm holding that button down you can see the light getting dimmer and dimmer and dimmer until it finally goes out then I'll know it's safe that I can touch across the terminals like that now the base that this connects to is right over here very simple this is a piece of half-inch plywood

I took some laughs with my staple gun stapled it to the plywood in the center underneath this block a section of the lab which has been cut away and then this is screwed in right through the center where there's no mesh there's no contact between this mesh and that mesh and the two go together so the mesh here is insulated from the mesh here I take my control unit like that now what I would do first of course is connect this to here and then connect that on to there shut down out of the way this one would go on the other terminal and that goes like that I would then take a piece of aluminum foil lay that on top a nice blob of peanut butter or a banana or a piece of cheese would sit right on top of here once that's all set up I then turn on the switch I let it run for five minutes I throw the switch off and then this will hold the charge or a great majority of it around 90 percent overnight and hopefully I wake up in the morning and I find the rat that's been causing trouble laying on top of this plate if nothing happened I push and hold this red button in and within about thirty Seconds to a minute the 450 to 500 volts will bleed off and

it will be safe to touch everything what I'm going to do now is I'm going to turn this on and show you how this works one other thing about this if you measure with the meter between here and here using a 20 mega ohm setting you will not see anything register I even put this on me 2000 mega ohm setting and I started to show a reading of around 750 mega ohm so this is pretty well insulated between these two so I don't have to worry about any connection between the two plates all right I'm going to turn this on and we're going to wait and I'm going to actually I'm actually going to speed up the video because I want to wait five minutes for this once it's fully charged I'll push this button you'll see how bright the neon lamp is lit and I'll give you a voltage reading and then I'm going to turn it off and we're going to short that out to show you how deadly that is push this to the side while it's charging up now the safest way to do it I don't let my animals run around number one but if I did I would put a plastic storage container over this cut a little tiny opening about two inches by two inches so the rat can get in and this way animals can't get in there or

children can't put their hands in there and that's the safest way to do it alright let's take a look at the device here see if we're getting any power going into there all right coming on dimly so it's probably around 100 volts let's take a look at the voltage on those two terminals two hundred and ten volts already take a look at this again and brighter let's take another reading 338 ad around 450 volts what I'm going to do is I'm going to position the box in the center of the table right here I'm going to short out those terminals to show you the amount of current that's stored at 450 volts in that capacitor let's take another look 390 almost actually does it in less than five minutes charges those capacitors up probably about three and a half minutes and I think we're getting close to 450 427 alright we take another check here of the voltage at 446 it's good enough and now so let me take this away I'll shut the switch off going to show you the illumination of the nice and bright alright and what I'll do is I'm going to show you again after I short this out how the discharge feature works so let me short this out put that right

there come in with a stick and take a look you you and as you can see it is not nice you definitely do not want to go any of those terminals pretty amazing that that little jewel sieve charges that up now I could take a look here by pushing that there's nothing I'm just going to hold this down this is bleeding off any extra might be thirty or forty volts remaining all right let me turn it on again charge it up and show you how this works let it sit let me take a look if it's over 70 volts alright it's back to set at least 70 again let me charge you up to at least 200 250 volts and then I'll demonstrate using the bleed resistor let me take a look at the voltage make sure it's at least 250 before I demonstrate with the bleeding with the resistor at 260 I'll show it off all right so when I push this you see this lamp is on now when I push that and hold that watch the lamp get dimmer I'm bleeding the capacitor down now it's below 60 and I'll hold it for another 10 seconds then those terminals will be

safe all right that's it if I touch this the foil there you go safe so just imagine when this is all connected up and you have your peanut butter or your banana or your cheese right here and that rat is standing right on here soon as it puts its paw on top of this foil here or opens its mouth to eat that cheese or whatever else is there it's going to have 450 to 500 volts go through its body very effective and it works very well if you enjoyed this video please rate it a thumbs up subscribe and post links to this video on other websites and blogs also be sure to check out my video playlist as well thank you for watching