DEVMO 5PCS DC 3v-6v to 400kV 400000V Boost Step-up Power Module High-Voltage Generator

yes they work very well.

Major Warning!!! Treat these modules with respect. They will set you on your you know what if you aren't very careful. A *brief* touch to a 9 volt battery will pop out an inch long spark and a loud snap. They are NOT rated for 9 volts, and operating in that range will destroy them quickly. The dielectric properties of insulation are absolute. Exceed it, and it perforates. Period. I marked the module I tested, and plan to discard it. They are also not rated for high current, so include a (high voltage) resistor in your final circuit. Remember that at 400 kilovolts, it only takes a current of 0.0025 milliamps to produce 1 watt of current. And that would probably be about the limit to these, unless someone wants to do some destructive testing. Quarter watt resistors aren't going to do the job, which is why I said HIGH VOLTAGE resistors. If you don't run them continuously, and don't exceed the input voltage constraints, great. Just don't complain when they stop working.

Best HIGH VOLTAGE MODULES you canbuy !!! I've been using these modulesfrom this company for several years --- and never had an issue with them !These modules will last a long time if you use them right and take care of them !The best battery to use with these is a3.7volt lithium-ion battery (18650) !Also, just always fire them in short bursts--- or they will burn out ! These modulesAre not designed to be on for any lengthof time !Also, it is best to keep the dischargeterminals about 1/4"--1/2" apart !If you have them too far apart --- this couldalso damage the modules (although theywill certainly produce bolts several incheslong) !These modules produce very loud,crackling noise when they discharge ,and very bright light too !The red wire is positive (+) --- the greenwire is negative (-) --- this is the end that connects to the battery !On the other end, you will have two wiresthat are the same color (usually black) ---this is the OUTPUT END --- these are the two wires that carry the high voltage ---DO NOT touch these two wires if you have the battery connected to them --- or you will get the SHOCK OF YOUR LIFE !!!Anyway --- if you need some very highvoltage modules for your DIY project ---these are definitely the ones to get !VERY HIGH QUALITY !!!DEFINITELY WORTH THE MONEY !!!

OMG I just ordered a five piece of these things and they're so cool I feel like a mad Scientist turning it on

These voltage converters work great now, but for some reason when I first got them in the mail, they did not work for 2 days. But when I tried 3 days later, they worked.