100W OU Radiant Energy Circuit

[tihomir]

Maybe you can use a transistor astable multivibrator circuit. This circuit uses two transistors (Q1 and Q2) to create an oscillation.
To achieve a short duty cycle, you can increase  and decrease the value of Rs. You can also increase and decrease the values of Cs. These changes will result in a shorter on-time and a longer off-time, which will give you a shorter duty cycle. Maybe look online for a basic circuit diagram and play with the values.

Thank you. That's a good suggestion.