@zander Thanks for the information. I will use 4 1.5 volt batteries instead of a 9 volt battery, and I'll check the voltage before connecting to the ...

Quick follow-up question. Is there a voltage regulator or something in the USB cable that drops the voltage from 9v to 5v? Thanks.

@zander Ron, you made my day! I was considering starting over with a different board. I'm pretty bad at soldering, so that would be quite a bit of l...

@zander Hi Ron, thank you for the response. I didn't know I could power a USB cable with a battery. That sounds like a great option, and I would li...

@davee Sermons are welcome, and at this stage, "too simple" is "just right" for me. Thanks for the pointers about the capacitor. I haven't gotten a...

@robotbuilder Thanks for the response. I will do some research on that. It looks like it's not as simple as I thought.

@will Hi Will, thanks for the response. I think I understand what you're saying about the power supply not being able to maintain the full voltage...

@zander Thanks for the response. I'm not sure which light bulb example I saw, but I think it probably was 120 volts. You are correct that the brea...

@robotbuilder Thanks for the response! Yes, the power source is a battery. I think I misunderstood parallel circuits. I didn't realize that adding...

Thank you for the kind words! I'm enjoying learning and experimenting (for me, swapping out parts is still an "experiment"). It's great to have the ...

Ron, Could you recommend a specific meter or brand? I searched for multimeters with clamp on ability, and the prices ranged from about $30 to over ...

It was the batteries! I tried two and thought that was enough. Next time I'll try three. The two batteries that I was using initially were from ...

Ron, thanks for the response. I'm going to get new batteries later today. The batteries I tried were unused, but they could be years old. I'm also ...