Which transistors should i use?

I didn't know there was a "Resolutions" toolbutton.
That's a new one in me, but then I'm so old, everything is new to me. I went out to my car this morning and it looked new to me. All I did was wash it last week and it still looks new. Must be the rain here in California doing that. Beats ice and snow...

Ice in California ???
I am north of that 2000 km, almost spring.

High altitude gives me headaches.

raschemmel:
Larry,
How did you do that ?
("click on image for full resolution")
Is that a new forum toolbutton ?

Paul__B make a Macro that you can copy and paste, your URL entered as shown.

[center] [url= Your_URL ][img width=500] Your_URL [/img] [/url][/center] [center]
Click on the image for full resolution.[/center]

It looks like a Link embedded in a Link

raschemmel:
It looks like a Link embedded in a Link

or, to be precise, a URL link (to the image) that will be activated when user clicks the image in the [ img ] tags.

CrossRoads:
MOSFET works similar to NPN (2N2222).
Arduino drives a voltage into the Gate thru 150 ohm resistor, (like R1),
Source connects to Gnd,
Drain connects to the 'bottom' of the motor.

Rds of the MOSFET is very low, so the motor will see almost all of the battery voltage, vs the NPN wasting 0.7V across the Collector-emitter.

The NPN won't waste 0.7V in saturation, 0.1V more likely. 0.7V is the base-emitter voltage.

It looks like 0.3V for 50ma and 1.0 for 500 mA
2n2222

CrossRoads:
MOSFET works similar to NPN (2N2222).
Arduino drives a voltage into the Gate thru 150 ohm resistor, (like R1),
Source connects to Gnd,
Drain connects to the 'bottom' of the motor.

Rds of the MOSFET is very low, so the motor will see almost all of the battery voltage, vs the NPN wasting 0.7V across the Collector-emitter.

is there any alternative MOSFET to IRL? i would have to import it, and takes to long lol

Check the MOSFET which you already have, you need a switching mosfet, in data sheet look for threshold voltage less than 5V.
example - IRF540
Gate-Source Threshold Voltage VGS(th) VDS = VGS, ID = 250 μA 2.0 - 4.0 V

https://www.vishay.com/docs/91021/91021.pdf

puelon:
is there any alternative MOSFET to IRL? i would have to import it, and takes to long lol

ted:
Check the MOSFET which you already have, you need a switching mosfet, in data sheet look for threshold voltage less than 5V.
example - IRF540
Gate-Source Threshold Voltage VGS(th) VDS = VGS, ID = 250 μA 2.0 - 4.0 V

https://www.vishay.com/docs/91021/91021.pdf

Yeah i see it: Min 2.0 max 4.0. But i still don't follow, i was told this isnt a logic level MOSFET, therefore i couldnt switch it to what i wanted, and i was looking all around me and far for it and nothing. So, you're saying i could do it with a IRF? im confused

which transistor you are testing ?

ted:
which transistor you are testing ?

IRF540, but i cant get it to work

Start with this

ted:
Start with this

Yeah, but my question remains will a IRF540 suffice?

Make this work then go to next step

ted:
Make this work then go to next step

this circuit is using a transistor and theres absolutely no specification whatsoever, and lacks plenty of information

Just test it and tell me the results.

You were adviced to use a normal bjt transistor with 220ohm base resistor (post#3).
Perfectly ok for a small ~140mA load.
Almost any small/medium transistor can be used for a load like that.
Why are you still trying to use a non-logic IRF540 mosfet.
You like gambling?

ted:
...in data sheet look for threshold voltage less than 5V.

Silly advice. A logic level mosfet must have a threshold voltage <2volt.
A Vgt of 2-4volt is a non-logic level type.
Leo..

I think @ted meant IRL540.
https://www.vishay.com/docs/91300/91300.pdf
A 5-for-a-dollar 2N2222 would work fine.