1 set Mini Music for Tesla Coil Plasma Speaker for Tesla Transmission DIY Coil Kit

Definitely will "work" if you know how to read a schematic and have some basic electronic knowledge.Google: "Slayer Tesla Coils"; these are really a transistor blocking oscillator working at high-frequencies. All parts are provided and you will need to know how to solder, have a soldering pencil/iron for electronic printed circuit boards (not plumbing or sheet-metal soldering tool!) You will need rosin-core solder and a few simple tools such as wire cutters.As mentioned previously, the instruction/parts sheet is in Chinese. The schematic is adequate except for complete novices.DO NOT expect long arcs from the coil: a 1/8" (3 mm) blue corona discharge is the best I could manage after adjusting the primary turns and placement. First image with 8.7V supplying the DC power.The coil WILL energize a long or circular fluorescent tube due to the high frequency and high voltage. Once illuminated, the tube will continue for a distance of about 8 inches as shown in the image.BEWARE that while the corona current of the top secondary is very low and not dangerous to humans, the corona may still cause minor skin burns if the fingers are allowed to stay very close to the discharge end of the winding. Most people will find the discomfort before suffering an electric burn.In testing, voltage above 8.7V and current in excess of 0.5A does cause the heatsink to become hot as shown in the thermal image; therefore, a 4xAA holder delivering 6V from alkaline cells would be a good selection for long-term running or a 9V supply pack made up of 6 AA or C cells would likely give good intermediate results.Science Demo use: you should know and understand the difference between "slayer" and a true Tesla Coil. This slayer unit does show effectively the transmission of Electromagnetic Energy for a short distance and does so safely and at the $8'ish price range is a fair bargain as purchasing individual parts would likely exceed the asking price of the kit.I DID NOT attempt to use audio modulation.

It appears you need to solder everything onto the board, and the only instructions are in Chinese and none of the parts are labeled. Maybe it's obvious to the more experienced what things are and where things go, but I don't have a clue. I'm going to try and copy what I see in the photos here.

Didn't come with cord... No idea if it works. Found one that should of been efficient . Only had two lights come on

Despite the instructions being almost entirely in Chinese the board silk and graphics on the instruction sheet made for easy assembly, not really any complaints there for a tenner; electronics is very much a universal language (and the important stuff like part references is almost always in Western characters at that).While it's not a particularly impressive high frequency/high voltage generator that throws inches-long arcs (expect what's in the pictures - around 2-3mm tops with the included coil), it does produce a corona and can demonstrate Tesla's ideas about wireless power transmission at least at a few centimeter ranges, and induce glow discharges in gas-filled tubes. Includes a small neon bulb which was nice of them.As many others have said, if the primary (the couple turns of wire around the outside of the coil of fine wire) is connected backwards the circuit won't start up. This is probably noted in the Chinese, but without the foreknowledge gained from reading the reviews it probably would have taken me a while to figure out, and involved analysis of the circuit and possibly some oscilloscope.Consumes about 20W at 20V, and judging by the heatsink temps it's dissipated mostly through the TIP41, so limit the duty cycle and be aware that the heatsink can get pretty hot if you don't have a fan of some sort to cool it. The audio input does work, but don't expect any more sound output from the "coronaphone" than from an earbud in open air, suitable for a demonstration of the principle but if you're expecting results like the multi-hundred-watt versions people on youtube build you'll be quite disappointed.Can be used to drive larger secondary coils, I had a coil on hand that I wound a while ago on a large pill container (~50mm diameter, ~100mm span of closely wound 40ga) and with a 3 turn primary was able to get a diffuse brushy discharge 4-5x larger than with the finger-sized secondary that's included, up to around 10-15mm. Definitely some hackability potential, and winding your own coil is an exercise that really only requires patience.Overall, is it what people expect when they hear "Tesla coil"? Not really - those are on a power scale at least 10x larger, and in a technical sense this is probably classified more as a high frequency induction coil than a true Tesla since it's not dumping a capacitor into the primary. With a larger DIY secondary it gets closer (see my photo).On the other hand if I had gotten this little kit when I was 12 I'd have been quite happy (even a little bit of HV is fun when it's a novel phenomena to explore), and as far as HV things go it's on the safe end of the spectrum; the biggest hazard is probably just the temperature of the heatsink after it's been running for a minute or two. Powering it is maybe a bit nontrivial since 15-24V is not as common as 5 or 12V, but two 12V batteries in series, a small grip of Li-Ions, or an old 18-20V laptop power brick would all work.4 stars because while it does exactly what I expected of it and is a fun little HV amusement, the documentation being in Chinese could make it seem a lot more daunting than it actually is to someone with no familiarity with electronics.

Neat little tesla can burn paper if, if you use a 3 amp at least 15 volts

So yeah

The product does not work at all

the directions are completely in Chinese but the board is well marked followed the markings and it worked. i powered it with 4 18650 batteries about 16v