Fish-in-a-barrel
New Member
I'm betting this is a solved problem and I just don't know the right words to get google to spit up a solution.
I want to switch on a fixed dummy load if the actual load in my project board dies. This is to prevent the boost converter from melting if it has no load. I feel like there should be a 1 transistor solution to this, but I can't find a configuration that works. This is what I've come up with instead:
I'm using a 2.2k resistor after the load to give me enough voltage to drive an NPN BJT that I'm using to essentially invert the signal to another NPN that switches on the load. LEDs are just for style.
This works on the bread board, but I feel like it's more complicated than it needs to be. Any recommendations?
I want to switch on a fixed dummy load if the actual load in my project board dies. This is to prevent the boost converter from melting if it has no load. I feel like there should be a 1 transistor solution to this, but I can't find a configuration that works. This is what I've come up with instead:
I'm using a 2.2k resistor after the load to give me enough voltage to drive an NPN BJT that I'm using to essentially invert the signal to another NPN that switches on the load. LEDs are just for style.
This works on the bread board, but I feel like it's more complicated than it needs to be. Any recommendations?