22 posts tagged electronics, newest first.
Following up on the previous post about pulling sensor data from sensors in a Verisure alarm system, here is a slightly more hardware focused post. One use case that the new Verisure alarm system does not handle nicely is machine-to-machine notification when the alarm is disarmed (turned off)
Last weekend I finally got around to doing something I have postponed for several years now. Being somewhat of a gadget hoarder, I have ended up with quite a large stack of rechargeable batteries. Everything from 12 Volt lead-acid ones from old UPS:s to Lithium-ion variants from
I was recently in Helsinki, giving a talk at a QlikDevGroup event. Great event, great crowd. The topic was SenseOps and Butler SOS, and I showcased the lamp above as an example of a funky, but still relevant way to monitor user activity in a Qlik Sense Enterprise environment. A
Over the air convenience A real pain point when developing sensor nodes that are scattered around a building (or a country or the world!) is the updating part. How do you get new firmware onto the devices? The cell phone manufacturers were early to investigate the options, but from my
Got myself an Andonstar 2 megapixel USB microscope about a year ago, mainly just for testing it out, and having it readily available when some repair project demanded it. The microscope is actually pretty nice given its ca USD 60 price point, with decent picture quality, a sturdy stand (even
Got myself a new toy a while ago – A FLIR TG165 infrared camera. These devices used to cost thousands of Euros/Dollars, but during the past year the have come down in price a lot. I got mine from SOS electronic, think they had a campaign on it back when
Once you got yourself a good multimeter, a good LCR meter is probably the next step. Remember to discharge any caps before measuring them though - otherwise the result might be what caused this post...
Looks like the good folks at Numato are at it again this year, with a very nice giveaway for various electronics kits. Very nice!
The recent bash vulnerability, a.k.a. “Shellshock”, is pretty bad, considering it might actually have been around for a very long time, maybe even dating back to the predecessor of bash. Not good. So what about Raspberry Pi’s? Are they vulnerable? Turns out they are, but there is
Apple tried to be smart with OS X Mavericks, developing their own FTDI drivers. Just too bad they don’t seem to work. I have been getting nothing but “avrdude: stk500_recv(): programmer is not responding” errors when trying to upload sketches to various Arduino compatible boards. In the end,
After having problems with SD cards failing after a few months in a Raspi that was supposed to be always-on, it was time to look for options. The IPE distribution seemed like a perfect match – it effectively makes the Raspi only use a ramdisk, except possibly during boot. When
There is a new tool in the lab: An HP 6632A power supply. It might be a a bit dated, but it has some pretty good and useful specs (0-20 V, 5 A). True, modern supplies are more compact and offer more features in a smaller box, but a