Diagram:-
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Parts:-
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
- T1 is an ordinary 9V 1A transformer connected backwards for step up.
- R1 MUST be installed on a LARGE heatsink. A good heatsink is the metal case the supply is built in.
- R2 Protects the laser tube from excess current. It should be soldered directly to the anode terminal on the tube. To find R2, start with a 500K 10W resistor and work down until the tube lights and remains stable.
- If you have trouble with the tube not starting easily, use a longer anode lead that is wrapped around the tube.
- Depending on the transformer you use, the circuit may or may not work. I cannot guarantee the operation of this circuit. Build at your own risk. Some transformers contain very few secondary windings which will quickly saturate the core and basically act like a direct short. The more secondary windings (that is, primary in this circuit) the better.
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