How would increasing the voltage on the main cap but cutting it's capacitance by over 50% do this if you didn't change out the transformer to increase the delivery voltage to the cap? Presuming this actually works as shown, this should just increase arc length, but actually reduce energy delivery which would actually make it weaker & constantly discharging if reinstalled since it would jump the gap in the grid the bug is supposed to bridge. Adding higher voltage batteries is going to stress the internal insulation of all the low voltage side components & probably burn them out quickly, since they're specced for 1.5v, not 3.7v. This seems very goofy & like it wouldn't work for several reasons, but I'm not 100% familiar with how these kinds of 'joule thief' transformers work or their oddities.
As we can see, this project not really good. Because every time you push the arm, your drill going sideways. I made this thing a few years ago and I had the same problem. I am not reccomend anyone to repeat this project. Choose gears or more, than two rails.
I replaced that red capacitor with 5 3kv 10nf ceramic capacitors and it was weak then i tried putting back the red capacitor and it was still weak the i put it on a 8v battery and it just broke. does the brand matter?
I will build it just as you dig and come back for a review. I have BB1 and BB2 in electronics so schematics is easier to read than the backside of a pack of Cornflakes. Keep it up man, you are a heal blessing to all of us other Nerds who like Treaking🙂