![]() ![]() If you don't have an Arduion around, or are looking for a more analog/elegant/cheap solution, you could use a 555 timer and a handful of common components to generate the PWM signal. Discover how to effectively interface the IRF520 MOSFET Driver Module (HCMODU0083) with Arduino in this step-by-step tutorial. How about attaching a potentiometer, and controlling the LED's intensity with that? Using a 555 Timer Setup the LED control pin as output, start lowįor (int i=0 i=0 i-=5) // Sweep LED off How to Control a MOSFET With Arduino PWM: In this instructable we'll look at how to control the current through a MOSFET using an Arduino PWM (Pulse Width Modulation) output signal. We are using PWM pins instead of a normal digital pin because MOSFET is a voltage control device i.e. Int ledControlPin = 3 // Must be a PWM pin - 3, 5, 6, 9, 10, 11 Here, we are using three PWM pins of Arduino board (pin 5, 6, and 9 but you can use any PWM pin). Define the pin connected to our MOSFET gate: Tutorials: Driving LED strips with Arduino PWM with power FETs. ![]() For example, you could slowly dim the LED bars with a sketch like this: language:c N channel power MOSFET TO-220 Package Vds 30V max Max current 62A Vgs 2.35V max Rdson as low as 8.7 milliohm - depending on Vgs Downloads: Datasheet. Then just write a simple sketch which analogWrite()'s that pin to the desired level. The Arduino is actually pulsing (very quickly) between 0 and 5v so that the average voltage is somewhere in between 0 and 5. If I apply zero value to the PWM, the current doesn't stop (I checked the PWM output with voltmeter and it's zero volts). Where the pin connected to the MOSFET gate could be any PWM-capable Arduino pin (3, 5, 6, 9, 10, or 11 on most 'duinos). I am using a mosfet and an Arduino and I want to control the Source-Drain current of the mosfet by adjusting PWM to the Gate. ![]()
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