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Old 09-07-2019, 02:53 AM
Corpze (Daniel)
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Corpze is offline
Join Date: May 2019
Location: Sweden
Posts: 5
Hi again.
I recieved two new boards (4ch irf540) but both of them puts out 12v regardless if the respective channel is activated by the arduino or not (the led on the 4ch mosfet board is only shining when the arduino output is activated by the code ( as it should be)

But even if the output from the arduino is 0% and the LED on the mosfet board is dark, it is 12v to the heater band and it gets really hot.

My connections is correct on the low-level side, as the LED is on or off when the arduino activates the output.

The 12v side is connected as 12v+ in and ground (shared ground with the arduino)

The outputs are connected 12v+ and ground from each channel to a RCA connector with same ground as the casing (and arduino)

I just can't seem to understand why the mosfet is always on?
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