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How can I find the current in the LED?

That is not surprising. See the reference below:. Post was not sent – check your email addresses! Setting a temperature to a comfortable level arduino switches the mosfet on for sec followed by a 50sec off time. Antonio, thank you for expanding. Who can tell me what should I improve i my schematic? You need a logic fet for that such as the IRL series.

Not sure though what bridge you datashwet. That 52 mOhms at 2. Can i use this circuit with Arduino to drive 2 x 20W 1. According to your post and the datasheet, the IRLN should have no ratasheet supplying the current at this voltage, right?

It start switching on at around 3V and it seems to be quite wide open at 4,5V. Now you want to put current through a coil.


Yes you can make it Ohm. Sign up using Email and Password. If you feed it with 15Volt the output voltage is around volt which will do the job.

Using MOSFETS with TTL levels (5 Volt and 3.3 Volt)

The STP3NA I do not know very well and I couldnt quickly find a readable datasheet, but though it doesnt seem to be a Iff520 level FET, from what I could see, ir520 should open enough around 3 volt already… but if you have a better datasheet, please check that.

I will try source a IRL Do you have the break out board in the drain or datqsheet source? Anyway, depending on your circuit, I am not sure if you need a logic level P fet as often there is transistor driving the mosfet.

I presume you are aware of the designcriteria of an H-bridge and the chances of shorting your PSU if you dont do the switching correctly. I am not sure what datasheet you looked at but I do not see a max of 4Volt, I see a max of ca 20 Volt.

IRFZ44, and you want to switch somewhat higher voltages i. Sorry, your blog cannot share posts by email.

Thank you for the clear explanation. To find out more, including how to control cookies, see here: This is for direct transfer so it is already mirrorred the right way. If Vthresh is given as R1 is just there to limit the current through the gat, coming from datasehet microcontroller pin.


That just will make your circuit much dagasheet and save you a transistor and resistor. And as i understand when you put 5 volt on the gate, the output on the source i presume is only 5Volt. You will find the print ifr520 here. Good luck, but dont hesitate to ask again shld you need further advice. They indeed can stand almost 7A, but only when sufficiently on or off. Thanks very much for your time. You are commenting using your WordPress. Rds 38mOhm with a Vgs of 3.

Thanks in advance, Ruben.

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Whats about irf502, I have check in the datasheet and seems to work very well at TTL levels even with a lot of Amps. But if it is working for you, that is good. Normally the impedance of a FET is high enough to not lose any signal over that resistor.