If you have ever worked with lasers, you know how fun and interesting it can be, you also know how expensive it can be. The high voltage power supplies for the laser tubes are often more expensive then the tubes themselves. This supply can be built with commmon parts, most of which you probably already have in your junk box. The secret is the transformer used. It is a common 9V 1A unit, connected backwards for step up. Please note that some people may have trouble with this supply. This is due to the slight difference in transformers. Schematic Parts Part Total Qty. Description Substitutions R1 1 10 Ohm 10W Or Greater Resistor R2 1 Ballast Resistor, See "Notes" D1, D2, D3 3 1N4007 Silicon Diode C1, C2, C3 3 0.1 uF 2000V Capacitor T1 1 9V 1A Transformer S1 1 115V 2A SPST Switch MISC 1 Case, Wire, Binding Posts (for output), Line Cord Notes 1. T1 is an ordinary 9V 1A transformer connected backwards for step up. 2. R1 MUST be install...