Calculations
Increasing Resistance
Please proceed to the Circuit Theory Page before you
consider adding resistors or a rheostat to your Hot Wire Foam Cutter
Digi-Key has a ton of electrical components including resistors and rheostats. The banner is a direct link to their products page, for you to search literally thousands of electrical products.
The search functions are sometimes a bit overwhelming. But if you just choose your known requirements like resistance, or wattage, then you should be able to find what you need.
Adding resistance to your circuits allow you to use a solid-state fixed voltage power supply on a variety of cutters and reducing the risk of power supply damage / failure.
