Mail Call #14: Loot from Amazon and AliExpress: Cables, Micros, and More! | In The Lab With Jay Jay

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In this video I open my recent mail. Stuff that I ordered:

In the video I mention that I made some notes about how to pronounce famous mathematicians’ names, those notes are here: God Created the Integers.

In the video I mention the Arduino Leonardo and the Arduino Micro which I am using for my MIDI-synth project: Crustaceans Chirp Chirp Challenge. Both the Leonardo and the Micro are based on the ATmega32U4 microcontroller which has built-in USB support.

My audio cables are so that I can connect my new gaming rig ‘treat‘ to my Logitech Z607 5.1 Surround Sound Speaker System Bluetooth.

The NASA Astronomy Picture of the Day for 2024 November 15 is what I needed the 3D glasses for. Unfortunately they didn’t work particularly well for me. Oh well, can’t win ’em all.

Also, I figured out how to use my thermometer properly by reading the manual. Go figure. The thermometer supports two modes of operation, forehead and ear. So it works properly if you use it correctly.

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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!

Sharp EL-546L Scientific CalculatorThis is an image of the product.notes

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Mail Call #13: Latest Loot from Amazon and AliExpress | Learning Electronics In The Lab With Jay Jay

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

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I open my mail. I got some stuff from Amazon and AliExpress:

The book that I mention I’m doing a new book teardown for is God Created the Integers, so keep your eye out for that coming up soon on the main channel.

The cable-making video I mention is this one: Electronics Project #5: Hook Clip Test Probes to DuPont Jumpers | In The Lab With Jay Jay.

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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 Universal Magnetic Ring Drill BitThis is an image of the product.

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Air Quality Meter

Mum is roasting a chicken and my Air Quality Meter started alarming. The oven in the kitchen is smoking too much! This thing is super sensitive, it’s great, I’m glad I got it! The other day while I was soldering with the window closed it started alarming too. It’s good to have something reminding you about air quality.

Mail Call #12: Latest Loot from AliExpress | Learning Electronics In The Lab With Jay Jay

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

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I take a quick look at what has arrived lately from AliExpress:

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


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!

Maxitronix Electronic Metal Detector Kit Electronics ProjectThis is an image of the product.notes

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Demo #2: Resistor Box Banana Plug Modding and Demo | Learning Electronics In The Lab With Jay Jay

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

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In this video I mod a pair of resistor boxes by installing banana plug terminals in place of the lug terminals they came with and then I give a quick demo of them.

In the demo we connect them in both series and parallel and then measure their resistance with my Fluke multimeter.

I mention this video from Dave Jones on the EEVblog: EEVblog #1020 – Is A $7 LCR / Component Tester Any Good? which is where I found out about the RS-201W resistor box which he has. I searched on eBay for RS-201W but what I found for over US$1,000 (inc shipping) was way too expensive: IET Labs RS-201W Wide Range Precision Resistance Substituter.

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


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 11 in 1 USB-C Hub USB HubThis is an image of the product.

Let’s go shopping!

Mail Call #10: Thanks Craig! Also loot from AliExpress | In The Lab With Jay Jay

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

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I receive Engineer’s Mini Notebook Volume II – Science and Communication Circuits & Projects all the way from the USA from my friend (and mentor (and reader (and viewer (and patron (and Lisp hacker))))) Craig. Thanks Craig! <3

I mention that the October 2024 edition of Silicon Chip magazine is out.

I mention that I recently got my symbol keyboard working on Linux! Pretty happy about that! These are the extra keys that I have at my workstation now: ° ± § λ Δ Σ Π Ω ε µ π θ

I also get a bunch of stuff from AliExpress, including:

And yes, despite confusion, I did get three lots of two different kinds of hard brushes, and yes, I did end up saying the wrong thing in the video! Can’t take me anywhere.

Oh, and as I mention in the video I am from a beautiful part of the world known as the Blue Mountains. It’s pretty hot here today!

In the end my collection of Arduino boards includes:

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


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!

Wozniak Solder LugsThis is an image of the product.notes

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JMP001 Symbol Keyboard now on Debian Linux

Thanks to my mate @edk from IRC I learned of the compose key. I configured my KDE Plasma desktop to use Right Alt as my compose key in System Settings -> Input Devices -> Keyboard -> Advanced. Then I updated the firmware and deployed a .XCompose file that I generated, and now I have a symbol keyboard on my Debian Linux workstation!

New electrical wiring

My new 10-way powerboard arrived today and I wired it into the booth along with a PowerShield Defender 1200 UPS battery which I had spare.

Then I had two spare powerboards so I installed one of them (with an RCD Safety Switch) behind the bench. You can see it in the photo below. The thing you can see plugged in on the top is my Watt Meter, it reports on current draw and power usage.

I am pretty happy with today’s handiwork.

John's powerboard installed behind his bench

Mail Call #9: Tools and Equipment from Jaycar, Amazon, and AliExpress | In The Lab With Jay Jay

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

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I go through what arrived in the mail recently.

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


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 Multifunction Hook ToolsThis is an image of the product.

Let’s go shopping!