Unit is built into a 3 x 2 x 1\" plastic box and is powered by a three wire grounded line cord operating from 110 vac. As a safety measure the output winding is directly connected to the earth grounded green lead of the power cord. This prevents any accidental contact to the 115 vac that could occur by accident or by a circuit fault.
Power and repetition rate are controlled by a combination potentiometer and switch. Output voltage pulses are up to 40 kv at .2 Joules and can be adjusted from xx to yy pulses per second. Sparks are very audible and visual for the small size of this unit.
Easy to build Tesla coil produces up to a 50 mm point to point 50,000-volt spark discharges. Spark repetition rate is selectable between a heavy and slow or a fast and light discharge. Operates from a 12-volt battery or a safe 12 volt 300 ma wall adapter transformer. Unit features a built in timer allowing individual adjustment of \"off\" and \"on\" times from several seconds to several minutes. Once the \"off\" and \"on\" cycling times are set, the unit can be left on as an interesting display. Excellent action science display project or use as a room desk or bureau piece. Unit includes Off/On, Timer Enable/Disable and Spark Texture Switch. Device is built in a 6 x 2.5 x 2\" plastic enclosure. Kit includes all parts with a fully screened printed circuit board. Hazards: Output isn\'t dangerous but will provide a moderate shock if contacted. Assembly: Wire and solder to a printed circuit board with some basic mechanical assembly. Applications: A conversation piece, special effects prop, office or bar action decoration.