McLab12_MOSFET_PWM_3chLED_OS6_tk1 Hardware L432KC or similar with PWM capable outputs. The L432KC pin D13 for onboard LED is not PWM capable! LEDs and xxx Ohm resistor. For example for a 12 V supply, three LEDs in series select a 120 Ohm resistor for 20 mA LEDs. For testing 3 pieces MOSFET IRL540, LEDs, resistors.

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