Rat Zapper Power Supply conversion - Page 1
Forum section: electronics / projects

author: SteveSparks
author_rank: Newbie
timestamp: November 17, 2018, 03:40:27 am
content: Got expensive replacing batteries in my Rat Zapper Ultra. It is very sensitive to battery voltage sag, and will begin rapid red led flashing when batteries get a even a little low, i.e. 5.8 volts (4 d cells) will cause flashing. So batteries don't work very long.So I decided to "wire" it up for a plug in wall wart power supply. I had a model AD-0660-ul, 6v DC, 600mA output power supply with correct 1/8 mini headphone plug (mono 2 conductor) on it. Note that the zapper needs more amps to run the zap, so I will have to find a supply with more output...around 2000mA should do it.To wire the Rat Zapper I re-purposed the existing jack on the top of unit designed for the "Rat tale" indicator accessory. If you want, you can add another jack of your own choosing, and that will allow you to use whatever 6v supply you have on hand and you can just match the jack. While leaving "Rat Tale" jack functional.The wiring was easy. The existing jack has a black and blue wire attached. Black is ground, so just leave it. The blue wire is for the "rat tale" so I cut it 1 inch above the pc board connection ( leaving a section long enough to reattach If needed later for "rat tale"). Next I melted a small section in the middle of the Red wire going to pc board connector that feeds the batt power into board. I then twisted blue wire from jack around red exposed wire and soldered. a bit of hot glue around joint and against side wall nearby to insulate. All done. So that's it, just one connection change and you're ready to zap battery free.Try not to unplug power with the zapper switch in ON position. The circuit doesn't like it and the unit will not power up for a while, but it will revive.No this is not sanctioned by maker, thus voids warranty...if there is one. Has not been UL tested and maybe hazardous in some way, so try at your own risk.Good luck Zapping and saving on Batteries.SteveSparks

author: t1d
author_rank: Super Contributor
timestamp: November 17, 2018, 04:58:55 am
content: Good project.You might want to consider a Buck Converter, for the power supply. You can get more amp and watts, way efficient, little heat, and cheap. They are switching supplies, but I doubt the circuit would care.https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR12.TRC2.A0.H0.Xbuck+converter.TRS0&_nkw=buck+converter&_sacat=0Another thought... Rodents are drawn to wires, to chew on them. No kidding, rats, mice, squirrels, and even rabbits. So, maybe put the supply cord in a wire loom, for (some) protection. Got pipe?

author: chemelec
author_rank: Contributor
timestamp: November 17, 2018, 11:17:47 pm
content: Here was my High Voltage Rat Trap. (Pack Rat)He Avoided Every trap, But this 15KV Neon Transformer Got Him.

author: m3vuv
author_rank: Super Contributor
timestamp: November 19, 2018, 12:27:38 am
content: i wouldnt like to pee on that in the dark!!

author: Tedro
author_rank: Unknown
timestamp: November 19, 2018, 08:06:03 pm
content: Quote from: m3vuv on November 19, 2018, 12:27:38 amI would

author: chemelec
author_rank: Contributor
timestamp: November 20, 2018, 03:39:22 pm
content: You have a DEATH WISH?

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: November 20, 2018, 10:28:47 pm
content: @chemelec:Your photo has me puzzled. How is your setup connected and what is the plywood for? The ground looks dry and the fact you have packrats leads me to believe you are somewhere in the Osoyoos to kelowna area, so I wonder how the return path is made in that dry dirt.