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I followed your technique but my coffee now tastes of IPA - not India Pale Ale, but Isopropanol. Also, it has subtle hints of solder and flux and an aroma of scorched FR4. I think I've done something wrong.?

Hey - you've inadvertantly opened the trapdoor to a very specialist area of RF design. Radio hams have, in the last 25-30 years, been designing and building very high spec HF recievers and transcievers using H-mode mixers. There was a lot of buzz about these techniques 20 years ago or more, but due to the fact that DDS methods have taken over as the new wanna-buy kit the very high dynamic range approach that MOSFET and square-drive mixers provide has been bypassed except for those striving for the best possible performance. Some search terms for further research - G3SBI mixer , H-mode mixer , TLT H-mode mixer , IK4AUY mixer , high IP3 RF mixer I ran across this vid searching for "CMOS RF mixer" and ended up watching your whole vid even though I was really looking for a circuit I saw is Radcom magazine in, oh, about 1997 haha

How do you get the SDI cable?

Great video explaining component / composite! I hope I can use this information in a project I'm working on

I'v heard a few times people say that the 42S was the best HP calculator ever made. I don´t have a 42S so I can´t say if I agree or not, but I do have a 11C and I absolutelly love it dearly. I also have a 48GX that I used during engineering undergraduation but I would rather use the 11C than have to navigate through many 48GX menus. So I understand why many people would also prefer a simpler 42S than a vastly more complex and powerfull 48GX. I recently bought a 15C and a 41CV and love them both but for matrices, complex numbers and integration there is nothing like the 48GX.

I’ve been wanting to try this, I have the exact same machine too. Do you find that 1 minute is enough? It looks a lot weaker in color compared to the traditionally brewed one.

I think that BlackMagic may use some common PCB design techniques (not necessarily the same PCB) for a number of converters - I've seen a teardown of their SDI to HDMI converter czcams.com/video/ImcmgyI7OEg/video.html that looks very similar - so I think that unpopulated chip may be for an HDMI transmitter potentially.

Would love to see you try this with an Aeropress. Think the filtering would work well ?

I bought an ultrasonic cleaner (the exact same one you're using... ) just to test what that research paper found. My first run was a bit of a dud cuz I used a glass container rather than something thinner like plastic or metal, but I'll give this some more tries and see how it actually turns out. I can say this will never be a viable home coffee brewing method long term, if only because of the terrible noise the ultrasonic makes when on. Well, at least I have a parts cleaner at the end of this experiment...

I learned where not to put the mic on my body - armpit :D

My left ear feels left out.

Great video as always mate ❤

Mmmm 😋 subtle hints of microplastic

things you find around your house........ like an ultrasonic cleaner :D

Thanks a lot for the video. I love cold-brew coffee and use the Hario "Can" that you also had in your video. It's a great idea with the ultrasonic cold brew. I am going to try that. By the way, the placement of your Lavalier mic could have been better.

Ultrasonic can not only clean your stuff and make coldbrew, but you can also do the same with alcohol as coldbrew.

Gday, that’s pretty interesting, I’ve never seen an untrasonic cleaner used before but it works, cheers

i love signal processing its always surprising how ingenius it is

How long before hp sues the hell out of them?

Thanks! I worked in the mail room in Standard & Poor's back in the 70's and had to make many deliveries to McGraw Hill (in NYC). There was a store in the building that sold HP calculators and I fell in love with them but I couldn't afford anything at the time. I was able to save up and buy a TI 59 calculator w/printing crib and had fun programming blackjack on it. (I pulled it out of storage recently. The batteries died and the mag reader has problems but they otherwise still work!) In the early 80's I became a programmer was able to buy an HP 16C and it quickly became my go-to calculator. I had to change the batteries only once since then. I bought the Swiss Micros DM42 as soon as I found out about it. The keys and the screen are a bit lacking, but I love everything else about it. I still use the 16C for hex/dec conversions and bit manipulations and use the DM42 for everything else. I seem to have a problem with 'normal' calculators because I think in RPN now. I may buy a spare (updated) DM42 and their 16C clone and maybe others just for fun. My name is Dave and I have an HP calculator problem ...

I'm more of an AVR fan boy rather than PIC... I was wondering what kind of PICs you were using and if a poor little 8 bit AVR might be up to the job. I'm working with good old fashioned 625 line PAL rather than 1080p which could work in my favour. I came back here to see if you could recommend a good opamp for video work... so thanks for mentioning the LM7171 right at the start. :)

Please don't make any more videos.

Hi mate Paul from Sydney. I actually used the Cmos inverter as an audio amp (low powered) intercom. I cant remember the output power but it was enough to power a speaker. The feedback resistor on a "digital" gate is a forgotten trick. It forces the gate to its linear area. I think you may get vcc/2....not sure. With a quad inverter chip you could bias them all and put a ferrite ant out front and come up with a basic AM receiver..which part of Aus are you from?

Just got one of these from a thrift store. Any chance of getting it working on windows 11? Also, is that a pci-e x1 I see on the hdmi end?

Did you test how high in frequency it works ?

Perhaps it needs to see something on the SI pin to send the data. Perhaps it can send the data stored in memory for a particular user, and you would tell it witch user with some simple command. Often if you send a CR-LF sequence it will show some data and perhaps a command prompt?

i am still using the hp-15c since the 80's. it is on its second set of batteries! I also use a 41c. its nice swissmini revived these but they don't have the same build quality.

Incredible

The song is Hello Hammerheads by Caribou.

Incredible work, despite the lens being less than perfect, i'm impressed by the sheer effort at turning eyeglasses into its components. Funny and classy. Who's music is in the video by the way? Wanted to find more by them.

The image looks great, and also the edit and music. I am curious, who is the artist playing the song?

The video looks like early childhood memories and like being very old and dying at the same time

Nice!

Really interesting. And I love the result. I'd love to see how it does portraits. (And if you ever feel like making a longer video talking about the process, I'd love that :-))

Awesome!

HACKERNEWS BROUGHT ME HERE AND YOU GOT A NEW SUBSCRIBER

“Fingerprint coated” 😂

This is brilliant. Really enjoyed the mood you set with the music and imagery as well.

I love this so much!

Almost a dreamy quality

Much love! ❤‍🩹

Superb!

Totally agree with the need for the correct orange color! Does the case allow placing the DM42 face down without pressing buttons? I seem to recall my old hp42s could do that, and it was a nice way to protect it. (mine was stolen and i replaved with a 48s, also nice but kind of large, clunky compared with the 42s)

Bought my son a 28s for college but he wasn't too fond of it. I messed around with it just for fun, but now it does my taxes every spring. I like having the stack and being able to 'undo' to double check if something looks fishy. I think the plotting feature has gone awry but i'll be ok without it doing taxes.😂

Time to do my 50hr service at 100hrs :/ And thanks. I don't have a lot of time to spare recently and knowing what to expect before I go out there will save a ton of time!

Cool, I didn't know it was possible to get 1080p with component video, I thought it was limited to 1080i, but maybe it was just the limitation of the equipment I had back when I first heard about it. Nowadays it's getting nearly impossible to find a new TV with YPbPr input. A few still have a single composite input, but component is nearly impossible to find.

Hello superchromat. I am presently putting together a video about the widescreen Philips pattern. I see you are using a (sort-of) mock up of it for some actual experiments, which is quite interesting. I'd like to include a few seconds of this video in mine if that is OK?

No I/O, no go! HP-50g for me!

This is excellent... it's a bit too complex for the more "brute force" applications I've got in mind but a good bit of essential theory none the less.

I hope I’m not being too forward, but I’d love to buy one of these if you’re willing to sell one. It would be a great tool to have around :)