I ran into some missing capacitor values at Tada (book says that either electrolytic or ceramic are ok for all caps): 15uF, 68uF
For sake of getting all the caps in the same place (possibly saving on shipping cost), and since this is non-critical beginner breadboard stuff, I think it should be ok combining two caps that add up close to the required values such as:
6.8uF + 10uF = 16.8uF in place of 15uF
47uF + 22uF = 69uF, in place of 68uF
It seems that this shouldn't be a problem since the book says that all caps should be at least 16V and other ratings are of no concern, which I also assume includes tolerance. The book calls for electrolytic and ceramic caps, saying that it doesn't matter which are used but that it is recommended to use ceramic for values below 10uF because of price. Any way, Tada has neither electrolytic or ceramic for these missing values (15uF and 68uF), but they do have tantalum values that could be added to electrolytic values. It seems a bit odd to do that, and I don't know if it would cause problems. Maybe I will just get these missing values (and other missing components) elsewhere. But I'm still wondering if there should be any problems mixing various types of caps. And I'm just curious to look at analog signatures of different types of caps on an oscilloscope.