100W halogen + PWM

Im working on a project using OEM ( OGPSMARTSCOPE) and i need to control the lamps with potentiometers.... the old system uses Triacs and PWM, but i want to know if this the best way to regulate an halogen. Cause its OEM doest not have a datasheet or diagram so i have been "guessing" the signals and the circuit.

Is there another way to regulate PWM?????

is there an easier way to do it?? thanks

Sorry for my english

Check out this example that came with your Ardiuno code.

Your Arduino would still need something like your triac to drive the 100W portion.