Using a PDP-11/73 to do Real Science!

1위@JT-kz7kq19 hours ago

As any electronics person will say, before powering up something new/repaired first check for power shorts and then apply power from a current-limiting bench supply. It's lucky in this case that just the fuses blew. It could have been much worse....번역 보기

2위@chrismumford920618 hours ago

I think the default shipping method from JLCPCB is DHL, FedEx, or something like that. They also offer "Global Standard Direct Line" which is a fraction of the cost and hands off to the USPS upon arrival in the US, so I wouldn't expect a remote area surcharge.번역 보기

3위@Renville8010 hours ago

My mother worked as a lab technician, and back when access wasn't as tightly controlled as it is now, she let us kids come see the lab where she worked, so long as we didn't touch anything (meaning me). There was a machine slightly bigger than a jukebox along one wall that fascinated me. The samples were loaded into special 'cards' along with test reagent cards, and which traveled through the 'production floor' (if you will) via chain drive - the top of the machine was glass so you could see where the cards were at any given point in time! I now realize that it was a type of spectrometer, as it had a couple light sources and filters that rotated as it took measurements, and the final results were 'printed' onto photosensitive paper (started out yellow, but light exposure turned it purple - loved it when Mom would bring home blank sheets that were left over from the process of loading a fresh roll).번역 보기