declare pin 3 and A0 to be an output and input respectively:

Int pot = A0 // potentiometer is connected to analog pin 0 Int motorPin = 3 // the pin that the motor is attached to

Upload the code given below to your Arduino baord:ĭC Motor speed control using FQP30N06L with Arduino and potentiometer.

To know more about Arduino PWM frequency change, read this article.

Gate of the Mosfet is connected to the Digital PWM pin 3 of the Arduino UNO here, you can connect it to any other PWM pin according to the Load PWM frequency OR switching frequency requirements.

Load can be a Motor, a lamp, solenoid etc.

Connect the Arduino with the Mosfet using the required components as shown in the circuit diagram above.

To use FQP30N06L with Arduino follow these steps: So pin 2 (the tab) of a FET in a D²PAK package will nearly always be the drain.FQP30N06L Mosfet with Arduino Circuit Diagram In a D²PAK (as well as many other common packages), the bottom of the die is attached directly to the leadframe's tab, since (among other reasons) this provides good thermal contact between the die and the package (and any heatsink the package is attached to). The reason you can't find any FETs with the pinout you want is a practical one: due to the way VDMOSFETs (a category that includes almost all currently produced discrete MOSFETs) work, the source and gate are on the top of the silicon wafer and the drain is on the bottom. You've learned an important lesson today, to always double check your package pinouts!įor the purposes of running tests, you may be able to just cut the traces on the PCB and use wires to connect the FET to what it should be connected to, or connect it with wires while it's insulated from the board, but doing either of these in production is a bad idea. It's unfortunate, but you probably just need to get new PCBs made.

Mosfet pinout download free