When i connect the gnd from the mosfet to the gnd on my uno, it works, but when i connect the gnd to the gnd of a 5v voltage regulator, the mosfet module stopped working? I tried connecting to other external gnd pins but nothing works, so far only the gnd pins on the arduino works. Can anyone help?
That board is yet another example of a dishonest vendor claiming that a non-logic-level MOSFET (IRF520) is suitable for use with 5v on the gate. It works kinda at low currents (2Aish, see figure 1 in datasheet for IRF520), but will not work at higher current, and will overheat if you try.
DrAzzy:
That board is yet another example of a dishonest vendor claiming that a non-logic-level MOSFET (IRF520) is suitable for use with 5v on the gate.
It's a pity that, because for the beginner and or for prototyping, a suitable mosfet on a board could save a lot of buggering around with resistors and decent connections for the power side (rather than breadboard). (Although it doesn't have a flyback diode bulit-in according to the schematic.)
Welease_Woggah:
It's a pity that, because for the beginner and or for prototyping, a suitable mosfet on a board could save a lot of buggering around with resistors and decent connections for the power side (rather than breadboard). (Although it doesn't have a flyback diode bulit-in according to the schematic.)
Modern high power MOSFETs all have diodes built-in, its inherent in the structure of the device. Note this
doesn't apply to IGBTs or darlingtons (although some add them anyway).
Welease_Woggah:
It's a pity that, because for the beginner and or for prototyping, a suitable mosfet on a board could save a lot of buggering around with resistors and decent connections for the power side (rather than breadboard). (Although it doesn't have a flyback diode bulit-in according to the schematic.)
Thanks for all the inputs. I've decided to use the mosfet anyway as it is easier with a module than to construct one with another mosfet. (Or perhaps i should just remove the IRF520 mosfet and solder another on the module?)
I'm thinking of adding a mosfet to a LED driver to try to dim the LEDs. I've had a lot of success using LED drivers whereas the LEDs with power resistors tend to stop working after awhile. Has anyone tried that?