Hi all, amateur here, with just enough knowledge and google-foo to get myself into trouble. Hoping for some help on why my circuit isn't working.
I'm working on a project that takes a sensor input and triggers a keystroke from a USB keyboard. I prototyped the circuit on a breadboard using an alternate battery power source and it worked great. But I always intended to wire the power to the USB line for the completed circuit, and now it won't trigger. I'm fairly certain there aren't any issues with the soldering or anything, testing the individual connections and components didn't give me any obvious failure points. I'm thinking the change to a single power source screwed up how the NPN switches, but I can't figure out how to address that.
Any help would be greatly appreciated!
I'm working on a project that takes a sensor input and triggers a keystroke from a USB keyboard. I prototyped the circuit on a breadboard using an alternate battery power source and it worked great. But I always intended to wire the power to the USB line for the completed circuit, and now it won't trigger. I'm fairly certain there aren't any issues with the soldering or anything, testing the individual connections and components didn't give me any obvious failure points. I'm thinking the change to a single power source screwed up how the NPN switches, but I can't figure out how to address that.
Any help would be greatly appreciated!