상황
Adapting a cordless 18V lithium battery to power a hot-wire foam cutter with adjustable PWM speed control for portable cutting.
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01
Use a 555 timer astable oscillator with a potentiometer to adjust duty cycle and frequency
02
Drive a low-side N-channel MOSFET to switch the resistive nichrome load
03
Include fuse and power switch on the battery rail for protection and safety
When you need a portable, adjustable heat source for foam cutting from a cordless tool battery.