2n2222a will more than suffice. I'm pretty sure all the resistors used have been 1/2 or 1/4 watt.
So something interesting I want to bring up.same transistor, just a diff revision. You can buy 2n2222s @ Radio Shack for under $1. You're not dissipating much power through the resistor so heat isn't that much of an issue. Use a 15k 1watt resistor to alleviate any reservations you may have.
well, the n2222 is faster than both of the n3904 & n4401. So, if I were to use the n3904 or the n4401, the 'switching" might be a little delayed, but in the order of ms.Are you saying it would work faster with the n3904 or n4401? But only milliseconds faster?
As long as they are within the original specs i dont believe it would be a problem.
I just purchased the same set of transistors from radio shack.
Did you get 1/2 watt resistor? That is what I was going to make mine with.
Let me know your setup and if it works well and I will make it the same way.
enjoy!Finished my final product. Shink tubing was put over all components to ensure no moisture gets in. Will be installing it tomorrow.