Input voltage: 9-12V, can be started with 9V battery, but if there is an arc, the working voltage needs 12V. PCB board size: 4CM*3.1CM DIY parts delivery list: Component name quantity PCB board 1 Coil 1 3MM LED Blue 2 DC005 seat 1 105 monolithic capacitor 2 8*8 self-locking switch 1 10K resistor 2 15*10*20 small heat sink 1 3*6 screw 1 BD243 1 Bubble 1 M2*4 screw 4 M2*7 double pass copper column 4 Tesla coils produce high-temperature and high-pressure plasmas, can ignite, wirelessly transmit electricity, illuminate fluorescent lamps, and have wonderful arcs. There are many fun and very interesting scientific experiments. Tesla Coil is a transformer that operates on the principle of resonance (resonance transformer)