This site uses cookies. The input capacitance is best chosen as low as possible. But if it is working for you, that is good. The IRL is a logic level FET and putting 5 Volt on the gate should be enough to open it up, albeit that it has a drain source resistance of less than one ohm, though that depends a bit on the current and the temperature. That is not surprising. At 10 volt it is 4mohm and the fet can take 45 amp, but at 4. OK I try again:

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An attiny85 could do that as well. Another thing to beware of in datasheets is Vthresh threshhold voltage. That just will make your circuit much easier and save you a transistor and resistor.

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That is not surprising. The two P-channel mosfet will be driven by transistors.


As the can be fed with up to 18 Volt, it shouldnt be a big problem to use the to switch. Please bear in mind that eventhough a logic level FET, the IRLN is not at its lowest resistance at 5 Volt, but irf50 shld be low enough to make 10 amp no problem. You may also consider the IRLZ You could consider the FQP27P For the IRF it is even worse.


Do moyor have any idea why is the mosfet not working properly and letting the 12v works on the led strip?

I am not sure where you are based but the IRL costs abt 60 cts where I am. It is not expensive: Thank you for the clear explanation.

Aula 8 – Controlo Motor 24VDC MOSFET IRF | engenhocas4you

If bought per 20 it is 26 eurocts a piece. The battery is ok and gives a steady 4 volts.

moor This actually is used for heatedbed in 3D printers up to A. It already switches on at much lower voltages, albeit not completely, but the optimal voltage is around Volt. Sadly though it can only dissipate some 80 Watts There is the MTB60N05HD L that does 60 amps 50 Volt and Amps beware of the somewhat high input capacutance, bu thta does not need to mohor a huge problem in simple switching also you may consider browsing through this guide.

So they are shortened due to the back current coming from the motor when turned off and yet turning The Arduino’s 40mA output maximum per pin is not going to be an issue. I had a IRF Mosfet but now i understand why it became very hot.

To find out more, including how to control cookies, see irf54 I just touched the gate pin to turn motor on.


The question is the one joe provided a solution to in an earlier question, except just as you pointed out, his solution doesnt work because the emitter voltage will be close to 12V and the ird540 voltage from the arduino will be 5V so the transistor will close.

If it does open at 3 volt and your PIC supplies that, adding a transistor is not really irf450 and if you do it doesnt need to be the BC, can be a regular signal transistor too, like the The relatively cheap BUZ11 moyor also an option.

I was not aware of those. My hairs are starting to turn gray: More and more cheap Mosfets. I’ve connected everything properly but it works not quite the way I want it to.

What type of step up converter are you using? Antonio, thank you for expanding. R1 is igf540 there to limit the current through the gat, coming from a microcontroller pin. Thanks — You are correct. Email Required, but never shown.