Tabletop Foam Cutter

Schematic
OpAmp Circuit
Example Cut
More Photos


The cutter uses a series of opamps to generate a PWM signal with a variable duty cycle that drives a power mosfet.

Parts:

* [Power Switch](https://www.amazon.com/gp/product/B01BTTOEQ6/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1)

* 3x 10k Resistors, 2x 4.7k Resistors, 1x 470ohm Resistor

* [10k Potentiometer](https://www.amazon.com/MCIGICM-potentiometer-linear-WH148-Shaft/dp/B0791GYLBZ/)

* .1uF Capacitor

* Red LED

* [30