Hi all,
My first post on this forum, - and I am a little rusty in electronics so my question here might be n00bish.
I am messing with pulsewidth modulation for different purposes, and for that I just changed from using normal transistors / FETs to logic-level FETs. My problem is that I thought I could just shift my NPN Darlington out with this Logic Level N-Channel FET to get proper ON / OFF pulses, using a simple IC.
https://pdf1.alldatasheet.com/datasheet-pdf/view/182048/FAIRCHILD/RFD14N05L.html
My problem is that the transister seems to be always ON. I can even disconnect the wire to the gate pin and it will still be ON. After looking in the PDF, it looks like there is a diode between source and drain. How am I suppose to use that transistor, and can it be used for this at all?
Any help will be appreciated.
My first post on this forum, - and I am a little rusty in electronics so my question here might be n00bish.
I am messing with pulsewidth modulation for different purposes, and for that I just changed from using normal transistors / FETs to logic-level FETs. My problem is that I thought I could just shift my NPN Darlington out with this Logic Level N-Channel FET to get proper ON / OFF pulses, using a simple IC.
https://pdf1.alldatasheet.com/datasheet-pdf/view/182048/FAIRCHILD/RFD14N05L.html
My problem is that the transister seems to be always ON. I can even disconnect the wire to the gate pin and it will still be ON. After looking in the PDF, it looks like there is a diode between source and drain. How am I suppose to use that transistor, and can it be used for this at all?
Any help will be appreciated.