Since I want to learn, I tried to redesign it again by adding another resistor for the voltage divider. As long as back EMF current doesn’t run across several tracks on the board. Was that the same as for the mosfet? There is a severe risk that the result will be a smoking ruin: Wawa on Nov 19, ,

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However, it doesn’t indicate that the light bulb moosfet CN3 lights up. Thanks for your contribution. I just touched the gate pin to turn motor on. Using the transistor to drive the gate with higher voltage solved the problem. Can I leave it 4m35 I don’t see any reason why your schematic wouldn’t work as is. Now you want to put current through a coil.

You might pop the fets if the diodes are on the solenoids, and you connect them with the wrong polarity. I don’t know if it can work and I can’t understand why the 6N is considered as an “inverting optocoupler”. Sorry, your blog cannot share posts by email. I will use Arduino to dim the power acording to inputs from handlebar. 4nn35 may want to read up here https: Why you say that it is reversed logic?


Twisted wire is good.

These transistors will invert the signal from the N-channel mosfet, ensuring no short circuits could happen. Looking mosfrt those graphs one can see that at a gate to source level of 5V Arduino levels the IRF is only capable of delivering 1 Amp, whereas it is specified for 5,6 Amps continuous current.

That is definitely enough for most applications. It already switches on at much lower voltages, albeit not completely, but the optimal voltage is around Volt.

43n5 Normally the impedance of a FET is high enough to not lose any signal over that resistor. My dilemma is am new to this field so is there any other better power MOSFET for high voltage switching application and driver for the same.

This is for direct transfer so it is already mirrorred the right way.

Like the diagram at the top of the page here. Also you should increase R3 considerably since your phototransistor is barely turning on.


Optocoupler4N35 \ Learning \ Wiring

Email Required, but never shown. Sign up using Facebook. You could also remove the driver chip and mosfet, and use the opto to drive the servo. Sorry for the stupid questions.

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

And a step up boost converter to supply the 5. Hello — Great post! Will this circuit be able to deliver 5V 2. Wawa Shannon Member Posts: You have the wrong coupler In order to use a N-channel FET here, you need to be able to pull its gate above its source, which your mosfer transistor output has no ability to do.

Does not make a difference. Optoisolation and Mosfet combo Ask Question. Presumably what would have been readable to all viewers before is now gibberish for me and an unknown number of other users.