After doing some research, I found the attached schematic to make a high-side switch. However, this was designed for a 12V system, whereas I’m working with
3.3V (or 5V *) voltages. Also, I’ve never used FETs before, so I have a few questions:
a) How do I determine what transistor and P-channel MOSFET I need to look for. I have zero, none, no idea what I need to look for as far as specs.
b) How do I determine what the various resistors need to be? I’m assuming they are related to what the transistor and MOSFET need, but as with point (a), I don’t know how to figure those out.
The idea here is that I will be switching the
3.3V (or 5V *) voltage that feeds the 4-pin connector that goes to the LED string. It’s literally going to act as if it’s a mechanical ON/OFF switch, so no high frequency toggling.
- I’m still trying to determine whether I want to run this system at
3.3V or5V and I am going to start a different thread with the design and questions.
(Decided to stick with only 5V)