Since I’ve been working on the backend servers a lot over the past few days, I’ve decided it was time to get some broken things on the blog fixed. Firstly, the radiation monitor graphs. Originally I was using a Raspberry Pi to grab the data from the local monitor, and
A Smorgasbord of Acronyms There are ANSI, OSHA, FDA (CDRH), NRPB, and military standards. The CDRH (Center for Devices and Radiological Health is part of the Food and Drug Administration and is the most relevant regulatory organization in the USA for commercial and scientific lasers. The complete CDRH document may
During the replacement of the networking onboard nb Tanya Louise with gigabit, the main 8-port distribution switch was also changed. Here’s a quick teardown of the old one. This has been quite a reliable switch for the internal networking on board, but the time has come to switch over to
I’ve been meaning to sort some local graphs out for a while for the radiation monitor, and I found a couple of scripts created by a couple of people over at the uRadMonitor forums for doing exactly this with RRDTool. Using another Raspberry Pi I had lying around, I’ve implemented
I’ve joined the uRadMonitor network! I’m told my unit is on the way & it should be going live here in Manchester, UK within about 10 days. This is a crowd project to monitor background radiation levels all over the world, so far there’s a lot of units already online.
Old type ionization smoke alarm. Top of the device with the test button & sounder. Bottom of the device. Battery compartment in centre. Internals of the smoke alarm. Main component visible is the Ionization chamber. Piezo sounder on inside of the top. Inside the Ionization Chamber. 1µCi Americium-241 alpha particle