I was watching How To TEST OP AMPS Using A Multimeter vs Op-Amp Tester Project Single Dual and I learned about this Operational Amplifier OP AMP Tester For Single Dual OPAMP TL071 TL072 TL081 TL082 Single/Dual Op Amp Test Board.
I have to cool it on the spending for a little while, but I’ve made a note of this on my shopping list.
I was just poking about with my new thermal imagers and I found one of my power bricks was warm, while the one next to it, on the right, was not. Turned out the one on the right wasn’t plugged in properly! It was supposed to be powering a USB hub, but the hub was bus powered, not mains powered, and I couldn’t tell. I mean, all of the lights were on, and the power brick was plugged in, so I hadn’t suspected anything. If I hadn’t made this discovery with my thermal camera I would probably never have learned that my USB hub was unpowered. I could very well have run into problems with devices plugged into it being under powered, and I would never have known why.
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In this video I unbox my new UNI-T UTi260B thermal imager with macro lens and compare it with my Noyafa NF-521 thermal imager.
I made a few mistakes with the production of this video, sorry about that. I made a mess of the side branding, I will have that fixed in future. And I managed to get my toes on camera. The height of professionalism!
In this video I refer to my lab equipment documentation. Particularly I mention the Jackcat Mini Cutter electric scissors.
Note: in the video I’m not sure what “ROI” means, but it turns out it means “region of interest”. The region of interest is a box in the middle of the display, and some settings apply to this area.
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Yum Cha Heavy Duty Stainless Steel Wire Brush notes |
Let’s go shopping!
This evening I reviewed and updated the documentation about the equipment in my lab.
I swear, ChatGPT knows everything. Today it told me I could run the following in the developer tools console to speed up YouTube video playback beyond the “maximum” of 2x up to 3x (or more!).
document.querySelector("video").playbackRate = 3.0;
Gonna work through this playlist today: Learn to solder by Branchus Creations.
This evening I was working on a battery replacement for a Philips QT4022 hair trimmer for my friend. They don’t seem to make this model any more, it was hard to find useful info about them. I made some notes over here. In the end I accidentally released the magic smoke, but at least I got some practice using my soldering iron and my microscope (this evening I learned how to take photos with my microscope and transfer them to my computer, haven’t done that before).
I did start off making a video about this, but it all went very badly, so I’m not gonna be publishing that one. :P
I learned a few lessons:
My soldering skills are pretty poor at the moment. What I need is lots of practice. I’m not sure what the best tips or the best temperatures are yet. I accidentally lifted some SMD components because I used too much heat too close to them.
RIP Philips trimmer.
Found some good videos with various approaches to repairing traces on a printed circuit board:
Over on How To Repair Damaged / Broken PCB Traces – 2 Great Methods, Mr SolderFix says that Loctite Tak Pak is good PCB glue. He recommends the Loctite SF 7455 activator, and the Loctite 382 instant adhesive. I tried to find some for purchase but it’s only available via international shipping and costs a fortune.
I have some glue in my drawer, particularly 24x 3G Super Glue for Plastic, Leather, Ceramics, Rubber, Metal, Wood Super Glue. Might give that a go for wiring a bodge wire to a PCB to see if it works okay or not.
I’m in the process of moving some of my web systems to new servers. The blog.jj5.net has been completed, svn.jj5.net is a working progress, and some of www.jj5.net is broken until I can get around to fixing that too. This outage will manifest as some images which won’t load in blog posts. I’m sleepy now, so I’ll try and fix this tomorrow when I wake up.