Category Archives: Internet

Unboxing #31: AiXun H314 Hot Air Gun from AliExpress | In The Lab With Jay Jay

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

Silly Job Title: Volt Vanguard. I am the Volt Vanguard!

In this video we unbox the JCID Aixun H314 Intelligent Hot Air Gun Soldering Station 1400W Digital High Power BGA Rework Heating Station For SMD BGA Repair.

I learned about this hot air gun over here: Testing a 1400W Hot Air Station & Remote? – AiXun H314 Review. Shout out to my mate @nanofix, thanks for the tip!

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!

ANENG BT189 Battery TesterThis is an image of the product.

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Archer Semiconductor Reference and Application Handbook, 1978 edition (1978)

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

Silly Job Title: Phase Pharaoh. I am the Phase Pharaoh!

In this video we take a look at the Archer Semiconductor Reference and Application Handbook, 1978 edition. This old book from Radio Shack outlines their semiconductor portfolio as it was in 1978.

This book is available online over here: https://archive.org/details/archer-semi-1978-ed

In the video I accidentally skipped over a few pages: 14 and 15 and 40 and 41 and 44 and 45 and 50 and 51.

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 Probe TweezersThis is an image of the product.notes

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Interlude #18: Measuring Forward Voltage of LEDs of Various Colours | In The Lab With Jay Jay

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

Silly Job Title: …

In this video we use our Peak Electronic Design Atlas DCA75 Pro Semiconductor Analyzer to measure the forward voltage of ten different LEDs which I keep in stock.

In the following table the values are computed for VS = 5V and I = 20mA.

Size Colour VF VR RS
10mm RED 1.890 3.110 156
10mm GREEN 2.030 2.970 149
10mm BLUE 2.643 2.357 118
10mm YELLOW 1.939 3.061 153
10mm WHITE 2.615 2.385 119
5mm RED 1.889 3.111 156
5mm GREEN 1.995 3.005 150
5mm BLUE 2.710 2.290 115
5mm YELLOW 2.019 2.981 149
5mm WHITE 2.775 2.225 111
VS
Supply voltage, e.g. 5 V.
I
Desired LED current in milliamps, e.g. 20 mA.
VF
Forward voltage, as measured; e.g. 1.8 V.
VR
Voltage across resistor = VS – VF.
RS
Series resistance to use, in Ohms = VR / I.

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 13-in-1 Multi-function Digital Display USB Voltage Current Power MeterThis is an image of the product.

Let’s go shopping!

Module Monday #8: HW-038 Water Level Sensor Module | Learning Electronics In The Lab With Jay Jay

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

Silly Job Title: Electronics Guy. I am the Electronics Guy!

Today is Module Monday.

In this video we take a look at the 1pcs Rain Water Level Sensor Module Detection Liquid Surface Depth Height For Arduino.

The code for this Arduino sketch is here: 2025-11-24-HW-038-Water-Level.ino.

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!

Yutiars Round Paint BrushesThis is an image of the product.notes

Let’s go shopping!