mastodon 4.7.2Software developer, electronics enthusiast, Amateur radio operator, lover of classic rock.
Location: Brisbane, QLD, Australia (QG62ln)
Learned the hard way with #NetBSD : if you want the #gd and/or #ImageMagick libraries in PHP (commonly required if you're installing Wordpress or in my case, @movim@piaille.fr), one must install the X11 sets when installing NetBSD.
You can install them later using sysinst, however, have a back-up of your /etc handy, because it's real easy to accidentally blat your /etc config files with system defaults that will boot to single user mode with no sshd running.
@Sempf@infosec.exchange @cjust@infosec.exchange
Didn't do:
So that's a 10 for me.
@mgorny@social.treehouse.systems A few months ago I was wondering if reviving Pypy was an option… but replacing CPython is only part of the issue… it's all the other libraries like setuptools and friends… that are ingesting slop at an alarming rate.
This afternoon I found myself reading through the Lua reference manual to assess whether that might be worth trying as an alternative. Python seems cooked now.
@dianea@lgbtqia.space You push them all onto the stack with the pspsps instruction.
void* package = new void();
Rather than roll the dice on yet another Chinese vendor… I'm taking a different tack.
I've acquired a roll of 0.3mm PVC.
It's a 3½m roll of the stuff, 1370mm wide. Should be enough.
There are five possible ways I can join pieces of it:
Whilst I have devices that can put 100W of RF anywhere between 1.8MHz and 29MHz… I don't think my radio finals will take too kindly to this sort of abuse… and a RF welding rig is likely well outside my price range.
Ultrasonic rigs are up around the AU$700+ mark… pricey for a one-off.
Thermal welding rigs need to get to 300°C… soldering iron territory. I have an old Jaycar one that has temperature control and a somewhat buggered tip. Might be an option here.
I'll try a small sample of material and see what works.
Silly electronics question for people… I'm building a circuit that needs to drive a LED dot matrix panel, which means I need a beefy 5V DC-DC power supply to step down from 12V.
I found a suitable candidate: the Meanwell NID100-5. 5V 11A output. I'll be using it next to radio equipment, so class-B filtering is very desirable. The NID100 can be used without filtering for class-A (industrial) applications, but for class-B you need filters.
Below is the recommended circuit. I'm a little stumped with the inductor. This is not a symbol I'm familiar with. It is taken from the datasheet: https://configurable.meanwell.com/webapp/product/search.aspx?prod=NID100
The literature I can find says a differential mode inductor has two terminals, this appears to be a four-terminal device with two coils, mutually coupled somehow.
Right now I have a Kicad schematic with a Wurth Electric 7448421016 subbed in there: https://www.we-online.com/components/products/datasheet/7448421016.pdf
Is this the right type of filter here? Should maybe the connections on FL1 be swapped around to invert the phase? (e.g. swap pins 2 & 3, or 1 & 4)