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  • November-28 2019 14:02:28

    It only took me about 30 minutes to put together. Make sure you pay attention to the polarity of the capacitors and LEDs when you install them. Also, there are 2 different types of MOSFETs in the kit and the PCB will be labeled with where each one goes. The pictures in the BangGood listing are pretty misleading as there is no electricity shooting out of it once it’s built as shown in the picture. I tried it from 3 volts all the way to 24 volts and, while things do change at different voltages,

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  • TomVIP4
    November-14 2020 18:16:47

    Works as stated. The blue spark is very tiny but the luminescent bulb lights up spectacularly. You can present it like a nice trick to the kids. I have added a thermo-silicone paste between the transistors and their heat sinks. And finally I put a small fan from an old video-card - no worry to burn out the transistors even at 25 V.

  • February-14 2020 04:46:13

    Very nice item, take care that the primary winding L1 (i used 2 turns) is in the opposite direction of the secundary coil L2! experimenting with the numbers of turns of L1 and the voltage 12-24V gives different results…I have made 2 little video's, but cannot add them :(

  • April-07 2020 05:59:44

    Product as description. Assembled diy kit and tested ok. Used only half of wire provided in the kit to make pimary coil, only 2 turns around the HV coil. Supply voltage around 18V to get a visible spark. Good product. Recommend.

  • March-01 2020 03:37:58

    instructions were in Chinese but with help from schematics and videos got it assembled. isolation on the tip of coil tends to burn away while coil is operating.

  • May-08 2020 11:56:51

    good quality parts . fun family project. I bought 3 just to modify 1 to take it to the next level. you will need a power supply . I have lit up florescent light black light and a UV light

  • August-08 2020 18:57:48

    Ha llegado más tarde de lo que esperaba, y eso que era una de una oferta que ofrecian la llegada en una semana, "one week delivery" creo que se llama. A mí me ha tardado tres. Pero bueno, tampoco era una necesidad extrema. En cambio otro pedido que realicé el mismo día lo recibí tres semanas antes y me hizo más ilusión. El producto ha llegado bien empaquetado con todas las piezas. Ahora toca montarlo y disfrutar.

  • January-05 2020 01:23:16

    be carefull with polarity of some elements. And leave shorty first coil if you want spark . I have to be abla get spark at 12v and 19v .

  • January-21 2020 00:25:41

    Excelente producto muy intuitivo y muy facil de armar lo recomiendo ampliamente para inicio de electronica.

  • April-03 2020 14:15:35

    Fantastic toy for the home school kids. Demonstrate: 1. Energy transfer.....current to the coil primary....secondary coil Magnetic Field collapse and arc discharge.....IONIzed Air Particles alighting fluorescent light (even large fluorescent tubes) 2. Spark Gap Radio.....haha what fun like an AM RADIO....hear songs via the spark 3. Kit Building skills Tips: Same principle as car ignition coil.....Voltage amplification is determined by coil ratio. 1: 350 gives best results. Don't need the full


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