tanner_tech

Thanks! That bracelet idea is really good, I'll have to try it. This will definitely work with a metal spinner, though, I haven't tried a metal one yet. Theoretically, it will work with any spinner.

That is a pretty cool project! It's funny, I just did almost the exact same project about a week ago! I am working on an instructable on it too. It is really cool that you measured your rpm on an oscilloscope, because that's exactly what I did. And I got 1400 RPM too! Nice project!-Tanner_tech

Yeah, sorry. I got rejected from that contest and have not had time to edit that last part of the instructable.

It is outputting a very high voltage (>35000V) and a relatively high amperage. I have not measured the amperage yet, but estimate it to be around 10-15 mA, or .015 amperes.

This version of the time amp is unsafe, I agree. I have since built a safer version with a better person supply. the only modification to this time amp needs to be replacing the bridge rectifier with a single diode. With this modification, as long as you use a polarized cord where the neutral is grounded to the case, the tube amp should be safe.

This circuit has a very low current flow. Because of the input power of 1.5 watts, I estimate the output current to be about .05 milliamps. This is far below the lethal amperage of 100 miliamps.

I have learned these electrical theories through years of personal study. I have used YouTube and many old books from the sixties to learn what I know. As far as I know, they do not teach electronics in school. It is pretty sad, because it is a very fun hobby that combines physics, math, and good old engineering skills. I agree, many kids and teens do not want to create new things, they just like to play video games and like you said, "Watch". I think that our world would be a better place if every kid tried building things. Thanks for commenting, and by the way, nice pun at the end of your comment!

Cool!

Yes, a battery would be able to power this circuit. This particular device only draws about 1.5 watts.

I am indeed. I was wondering when someone would notice that.

Oops, must have been a typo. it is primary. Thanks for letting me know!