Hello,
I need some help learning how to trigger transistors using the K8055. I am not new to electronics, but I am also not very advanced in them.
I’ve read about ‘open collector outputs’, and even after reading about them I don’t understand their purpose/meaning. I would greatly appreciate if someone could explain what that means.
All I need to do for starters is control an LED using a transistor connected to my K8055. I know it sounds high, but I’m using a 9v power supply (and it doesn’t damage the LED, so it will work for me). I would simply like to be able to turn the LED on and off by checking and unchecking that output in the demo program. My project is more complicated than this, but I need to do this in order to learn how to do anything else.
I’ve searched all around, but I can’t find an explanation for how to connect the transistor to one of the outputs so it will function the way I want. I’ve read something about using a pull-up resister, but I really don’t understand what they were talking about.
I would really appreciate it if someone could explain how these outputs work and how I could turn an NPN transistor (2N3904) on and off. Thanks! 