Ink & Drum Printer?
May 10, 2012 5:53 AM Subscribe
Seismographs and polygraphs have a movie-portrayal printout of a paper drum & a needle drawing beautiful squiggles. What is that means of production called and how can I get it?
posted by tmcw to science & nature (4 answers total) 2 users marked this as a favorite
I've been trying to pull together a project of analyzing police radio activity over long timespans to see daily/weekly variation, and the software-angle is interesting, but it's a little too 'me' (software developer here).
So, the paper & ink method: I know it's not used in modern units, but is there some other field that still uses it? Or something I can type into eBay to find just that portion of the device that might respond to a DC current?