Thanks all for the assistance. It has prompted lots or reading (confusion, enlightenment, then confusion again!).
RE the transistor, I guess a better option would be something like the ZVNL120A https://www.farnell.com/datasheets/468771.pdf with a max gate source threshold of 1.5v, giving potentially more current at 3.3v (??). Will this affect the resistor ratings at all?
I also had a look at the ULN2003 board linked, then ended up looking a the bare chip in various different uses and it seems much simpler on the face of it https://static.rapidonline.com/pdf/82-0618e.pdf . Would the below work for me?Reading up, I concluded that the internal resistors would be sufficient and that COM is not required for non inducting loads. Two of these, in which case, would do the job and are dirt cheap/easy to add to a simple PCB or breadboard. Is it really that simple or have I missed something? Is there anything additional needed to protect the GPIO from the 12v LED supply?
Thanks again,
Phil
RE the transistor, I guess a better option would be something like the ZVNL120A https://www.farnell.com/datasheets/468771.pdf with a max gate source threshold of 1.5v, giving potentially more current at 3.3v (??). Will this affect the resistor ratings at all?
I also had a look at the ULN2003 board linked, then ended up looking a the bare chip in various different uses and it seems much simpler on the face of it https://static.rapidonline.com/pdf/82-0618e.pdf . Would the below work for me?
Thanks again,
Phil
Statistics: Posted by philmulrain — Thu Jan 18, 2024 1:05 pm