Hi' I'm a newbie and am working on a Project.
The project is simple, but I can't seem to get it to work.

• The aim of the Project is to make a 12v 60w light bulb blink
• The blinking is controlled using a microcontroller(Digispark). I can make LEDs blink using the microcontroller.
• The Problem is in getting the light bulb to blink. I tried using IRFZ44N MOSFET and also IRF540N MOSFET but doesn't work.
• The output of the controller is 5V. Can anyone please design a schematic circuit for me for this project?

I used a 5v regulator to supply power to digispark

 

We don't read minds here. Show a schematic and you will get lots of advice.

 

Sorry, i'm a newbie and tried to draw a circuit diagram. It's bad, but i hope its understandable.


https://ibb.co/gUQ0MR


Mods Note:
Please upload the schematic to our forum and the schematic had been modified with the correct symbol of N type MOSFET.

 

Did you try IRLZ44N logic level mosfet ?

 

Did you try IRLZ44N logic level mosfet ?

I tried IRFZ44N. Guess its the same?

 

Hi' I'm a newbie and am working on a Project.
The project is simple, but I can't seem to get it to work.

• The aim of the Project is to make a 12v 60w light bulb blink
• The blinking is controlled using a microcontroller(Digispark). I can make LEDs blink using the microcontroller.
• The Problem is in getting the light bulb to blink. I tried using IRFZ44N MOSFET and also IRF540N MOSFET but doesn't work.
• The output of the controller is 5V. Can anyone please design a schematic circuit for me for this project?

I used a 5v regulator to supply power to digispark

The easy way is like this. You’ll have to feed it 5v to keep it OFF. It will be ON when your controller pin is low (0v).

 

I tried IRFZ44N. Guess its the same?

No, the IRFZ needs 10 v to switch the gate, that is why I used the NPN. If you have an IrLZ44, that can be switched with 5v at the gate.

 

The easy way is like this. You’ll have to feed it 5v to keep it OFF. It will be ON when your controller pin is low (0v).

View attachment 138187

Thanks for the circuit @GopherT But what Transistors to use? I'll try this circuit, but is there any way to make the bulb ON when the Pin is high.
Thanks already for this circuit, it'll definitely help me.

 

To turn IRFZ44 you need 4.5V but IRLZ44 only needs 2.25V.
See fig.3 of their datasheets.

If you dont have IRLZ44 handy, you can try this circuit..

 

To turn IRFZ44 you need 4.5V but IRLZ44 only needs 2.25V.
See fig.3 of their datasheets.

If you dont have IRLZ44 handy, you can try this circuit..

View attachment 138188

Thanks @absf for the circuit. What do you use to draw clean circuits like these?
I'll try the circuit and reply. Thanks alot

 

I got it from google image...

https://www.google.com/search?biw=1...10i30k1j0i24k1j0i10i24k1j0i13k1.0.H2rhGhfnvtY

But GopherT must have drawn it but he was still faster than me.

 

Thanks for the circuit @GopherT But what Transistors to use? I'll try this circuit, but is there any way to make the bulb ON when the Pin is high.
Thanks already for this circuit, it'll definitely help me.

Use your IRFZ for the mosfet and a 2n2222a or a 2n3904 or nearly any NPN you have in your junk box. Even a BC337 like BASF showed.

Note that his circuit is just like mine and will turn on the bulb when the input is low. You’ll need either s logic level MOSFET (and no NPN), or an additional PNP transistor to make the bulb turn on when the input is high.

 

 

Thanks guys. Thanks alot for the help. I'll post the result after hopefully succeeding in this project. Thanks again. BTW @GopherT , what app do you use to create the circuit diagrams?

 

Thanks guys. Thanks alot for the help. I'll post the result after hopefully succeeding in this project. Thanks again. BTW @GopherT , what app do you use to create the circuit diagrams?

iCircuit for iPad. I think it cost $4.99. But it also simulates the circuit and has a simulated oscilloscope and all the good doo-dads. Not as good as LT Spice but nice for an app.