I picked up a little bulk pack of ceramics on ebay, were pretty cheap - 250 assorted caps for $6 or 7.... they are TINY..... not inspiring in terms of quality. I note on the ebay sellers page they are listed as PIC/Arduino - no voltage noted. I wonder if they are meant for 5V??? The 'prime spec' ceramics I've bought from my local electronics place are listed as 50V, and get larger as the value increases. I'd like to buy another bulk assortment lot, should I get 50V rated caps? anything else to look out for? Suggestions where/what to buy?