cmatteri

6 ms·

1.
by cmatteri 6y ago
You can buy (or build from a kit if you can solder) a functional geiger counter that will detect gamma radiation (what cobalt-60 emits) for under 100 USD. They're a bit too big to put on a keychain, but you can easily keep one in a bac
2.
by cmatteri 7y ago
I found the frequency of contamination of scrap metal with radioisotopes to be disturbingly high (this article lists several more cases in addition to those in the wikipedia article: https://slate.com/technology/2013&#x
3.
by cmatteri 11y ago
Shouldn't the mill be able to precisely drill very small holes for you? Perhaps you could you use the pick and place machine to put small pins in the holes which would be soldered in place on both sides. You could conceivably use one 2
4.
by cmatteri 12y ago
I believe it contains on the order of twice as much flux, but I can't find a source for that at the moment. So I don't think flux fumes are much more of a concern than with leaded solder (for which you should have good ventilatio
5.
by cmatteri 12y ago
The use of leaded paint indoors and of leaded gasoline were particularly dangerous, but there are still numerous potential sources of lead exposure, especially in certain industries, but also for the average person. Exposure has decreased
6.
by cmatteri 12y ago
Does anyone have any thoughts on the comfort (for extended use in an office) and effectiveness of the QC-20 vs the QC-15. It seems the QC-20 is better on both counts, despite its in ear design. One downside to the QC-20 is that he battery
7.
by cmatteri 12y ago
The article doesn't say, so it's worth mentioning that you can type ctrl-R multiple times to search further back into command history.
8.
by cmatteri 13y ago
Play this song for the full experience http://www.youtube.com/watch?v=zQuH4woPDn0
9.
by cmatteri 13y ago
Or P2P services, which could potentially present a greater threat to Google. Only a small fraction of network users are willing and able to run a personal server, and even those that do aren't capable of competing with Google in terms
10.
by cmatteri 14y ago
I was going to suggest mapping both jf and fj to escape so you could mash the two keys at the same time without worrying about order, but jk and kj would work as well
11.
by cmatteri 14y ago
Their function 10^(5.5-pH) * (mg/cl sugar + 1) does seem to imply that sugar and acidity have a synergistic effect, where the +1 in the sugar term is a hack to keep the result from being 0 if the sugar is 0. This doesn't make sense, as a m