Category Archives: In The Lab With Jay Jay

Module Monday #10: HW-390 Soil Moisture Sensor Module | In The Lab With Jay Jay

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Silly Job Title: Sparky. I am Sparky!

Today is Module Monday and the module we’re looking at today is the HW-390 Soil Moisture Sensor Module. This is a capacitive sensor which is different to the two previous moisture sensors which were resistive.

The code for today’s demo is here: 2026-04-20-HW-390-Capacitive-Soil-Moisture.ino.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to look for a waveform (there was none).

We use the EEVblog BM2257 Digital Multimeter to measure voltage and resistance.

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! :)

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 4pcs 30mm Deep Hole PenThis is an image of the product.notes

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Mail Call #55: Tapo P110M Smart Plug, FNIRSI SG-002, USB-C Power and Cables | In The Lab

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Silly Job Title: Technical Director. I am the Technical Director!

In this video we take a look at what has arrived in the mail:

We use the Scotch Titanium Scissors to cut open some packaging.

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 TP-Link, AirPods, and USB-C 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!

ANENG AN-999S Bench MultimeterThis is an image of the product.notes

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Electronics Project #26: More Banana Jack to Female DuPont Cables | 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: Craig Entertainer. I am the Craig Entertainer!

In this video we make some banana jack to female DuPont cables for connecting various things such as multimeters and power supplies to circuit boards using pin header.

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

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

We use the MUIN Solder Fume Extractor to clear the air.

We use the EEVblog BM2257 Digital Multimeter to test our cables.

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

We use the Plato Model 170 Wire Cutter to cut our wire.

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! :)

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!

TOOKKS HZY ABS Wire FixtureThis is an image of the product.notes

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New Book Teardown #9: Basic Circuit Analysis 2nd Edition (2011) | 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: Operation Manager. I am the Operation Manager!

In this video we take a look at what’s inside Basic Circuit Analysis 2nd Edition.

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

p.s. today I added Teardown 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!

HDmatters 4K HDMI USB 2.0 4-Port HDMI KVMThis is an image of the product.

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Music from a Pencil | Project 12/30 | Maxitronix 30in1 | In The Lab With Jay Jay

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Silly Job Title: Energy Maestro. I am the Energy Maestro!

In this video we do the 12th project from the Maxitronix 30in1 Electronics Project Lab Kit: Music from a Pencil.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to investigate our oscillator’s waveform.

We use the METCAL PS-900 Soldering Station to solder our cables to the alligator clips.

We use the MUIN Solder Fume Extractor to clear the air.

We use the EEVblog BM2257 Digital Multimeter to measure resistance.

We use the Multicomp Pro MP701033 Resistor Decade Box as a variable resistor.

We use the Carpenter Mechanical Pencil to draw our pencil resistor.

We use the Plato Model 170 Wire Cutter to cut our cables.

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 MUIN 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 6pcs Wire BrushThis is an image of the product.notes

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Interlude #20: Making Banana Jack to Female DuPont Cables | 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: Relay Renegade. I am the Relay Renegade!

In this video we make a few cables for connecting our cheapo DT830B digital multimeters to our test circuits via pin-header. The cables have banana jacks on one end and female DuPont connections on the other end.

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

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

We use the Fluke 17B+ Digital Multimeter to test our cables.

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 AliExpress, multimeters, and Patreon 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!

EXAR XR2206 Signal GeneratorThis is an image of the product.notes

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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.

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Interlude #19: Making Power Cables for FNIRSI SG-002 Current Source | In The Lab With Jay Jay

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

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

Silly Job Title: Note Taker. I am the Note Taker!

In this video we make some power cables for use with my FNIRSI SG-002 Signal Generator. I use these as a current source in my experiments. The power cables I required are DC barrel female sockets into banana jacks.

I am getting ready to build some circuits to test Thevenin equivalent circuits which I am learning more about over here: Thevenin & Norton practice problems.

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

We use the AiXun H314 Hot Air Gun to shrink the heat shrink.

We use the EEVblog BM2257 Digital Multimeter to test the cables.

We use the Multicomp Pro MP701033 Resistor Decade Box to explain how I plan to use these new cables.

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

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

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

p.s. today I added Thevenin, METCAL, AiXun, and Multicomp 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 5 in 1 Air Quality MeterThis is an image of the product.

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The Beacon Light | Project 11/30 | Maxitronix 30in1 | Learning Electronics 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: Transistor Troubadour. I am the Transistor Troubadour!

In this video we do the 11th project from the Maxitronix 30in1 Electronics Project Lab Kit: The Beacon Light.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to examine the waveform.

We use the UNI-T UTi260B Thermal Imager to check the thermals (there wasn’t much to see).

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! :)

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!

MECHANIC Hard BrushThis is an image of the product.

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Learning the Art of Electronics: 1L.7 Oscilloscope and function generator | In The Lab With Jay Jay

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

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

Silly Job Title: Spark Slinger. I am the Spark Slinger!

In this video we continue to work our way through Learning the Art of Electronics. In this video we finish 1L Lab: DC Circuits by learning how to use our oscilloscope and function generator.

We use the Rigol MSO5074 Mixed Signal Oscilloscope as our oscilloscope and we use the UNI-T UTG962E Signal Generator as our function generator.

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

p.s. today I added slinger 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 Razor BladesThis is an image of the product.

Let’s go shopping!