Unboxing #32: Unboxing the Casio fx-991CW ClassWiz Scientific Calculator | In The Lab With Jay Jay

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Silly Job Title: Voltage Virtuoso. I am the Voltage Virtuoso.

In this video we unbox the Casio FX-991CW ClassWiz Scientific Calculator.

Thanks very much for watching! And please remember to hit like and subscribe! :)

p.s. today I added ClassWiz to my spell check.


Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!

Yum Cha Orange Telescopic Magnetic Pickup ToolThis is an image of the product.

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The Art of Computer Programming (TAOCP)

Today I purchased the following ebooks for The Art of Computer Programming (TAOCP) by the venerable Donald Knuth:

Scientific calculators and graphing calculator

Today I got myself two scientific calculators:

One graphing calculator:

And a few books about how to use them:

If you’re interested in such things you might like to check out Developing a Scientific Calculator Easier for Everyone to Use, the story of the Casio ClassWiz models.

I also considered:

On my iPhone I have:


Casio FX-991CW Advanced Scientific Calculator

Casio FX-991CW Advanced Scientific Calculator

TI 36X Pro Scientific Calculator

TI 36X Pro Scientific Calculator

HP Prime G2 Graphing Calculator

HP Prime G2 Graphing Calculator

Learning the Art of Electronics: 1S Supplementary Notes: Investigating Thevenin equivalent of voltage divider | In The Lab

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This post is part of my video blog and you can find more information about this video.

Silly Job Title: Luminary Luminar. I am the Luminary Luminar!

In this video we continue to work our way through Learning the Art of Electronics. In this video we finish 1S Supplementary Notes: Resistors, Voltage, Current and do Exercise 1.10 from The Art of Electronics which has us investigating a voltage divider.

In this video I recommend to you the book Schaum’s Outline of Basic Circuit Analysis, 2nd Edition and Gary Tuttle’s website gtuttle.net where you can find Thevenin & Norton practice problems.

We use the METCAL PS-900 Soldering Station for soldering.

We use the AiXun H314 Hot Air Gun for heat shrinking.

We use the Pro’sKit SS-331H Desoldering Pump to fix up some of our mistakes.

We use the Tenma 72-10505 Bench Power Supply to provide 15 and 30 V DC to our circuits.

We use the EEVblog BM2257 Digital Multimeter to measure voltage.

We use the Fluke 17B+ Digital Multimeter to measure current.

We use eight of the cheapo Yum Cha DT830B Digital Multimeters as ammeters and voltmeters.

We use the Brother P-Touch D210 Label Maker to label our circuit.

We use the Sharp EL-546L Scientific Calculator to do some basic calculations.

We use the Bysameyee Head-Mounted Magnifier to light up our life.

We use the nmsafety Nitrile Gloves to protect our fingers.

We use the ElectroCookie PCB Prototype Solderable Breadboard to make our circuit on.

We use the WilliamKlein Music Stand to hold our tome.

We use the Scotch Titanium Scissors to snip, snip, snip.

We use the Hakko CHP 3C-SA Precision Tweezers for tweezering.

We use the Plato Model 170 Wire Cutter to cut, cut, cut.

We use the Kaisi S-160 45x30cm Repair Mat as our workspace.

Thanks very much for watching! And please remember to hit like and subscribe! :)

p.s. today I added Luminar, Pro’sKit, Desoldering, Tenma, Yum Cha, Multimeters, Bysameyee, nmsafety, ElectroCookie, Solderable, WilliamKlein, and Hakko to my spell check.


Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!

Yum Cha 10pcs Glue Removal Razor BladesThis is an image of the product.

Let’s go shopping!