Category Archives: Learning

The Leaky Faucet | Project 13/30 | 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: Maker of Videos. I am the Maker of Videos!

In this video we do the 13th project from the Maxitronix 30in1 Electronics Project Lab Kit: The Leaky Faucet.

Here are the timing measurements we took:

Capacitor Resistor Period
10 µF 470 kΩ 3.05, 3, 2.97, 3.03, 2.98
10 µF 100 kΩ 0.67, 0.6, 0.8
100 µF 100 kΩ 7.02, 7.02, 7.15
4.7 µF 100 kΩ 0.43, 0.35, 0.39
4.7 µF 470 kΩ 1.76, 1.5, 1.56

We use the Rigol MSO5074 Mixed Signal Oscilloscope to look for the oscillating signal.

We use the UNI-T UTi260B Thermal Imager to check the thermals (nothing interesting to report).

We use the Carpenter Mechanical Pencil to take our notes.

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 16MP USB CameraThis is an image of the product.

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Learning the Art of Electronics: 1L.4.3 10 mA Ammeter Redux | 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: Electronics Guru. I am the Electronics Guru!

In this video we continue to work our way through Learning the Art of Electronics. In this video we return to 1L Lab: DC Circuits and revisit lab 1L.4.3 in which we made a 10 mA ammeter. This time around we do a better job of it, build two ammeters from different movements, and compare our results with an actual known-good ammeter.

As promised here are the notes:

We use the Tenma 72-10505 Bench Power Supply to provide 5 V for testing.

We use the EEVblog BM2257 Digital Multimeter to measure our resistor and as our reference ammeter.

We use the Sharp EL-546L Scientific Calculator to calculate our shunt resistance.

We use the Multicomp Pro MP701033 Resistor Decade Box as our shunt resistor.

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 mA 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 Universal Handheld Wire StripperThis is an image of the product.notes

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Module Monday #10: HW-390 Soil Moisture Sensor Module | 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: 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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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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Just train tired

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Justin Sung’s D-F-U-Z method for Thought Action Defusion helps to decouple your productivity from your motivation:

  1. Distinguish (between feelings, thoughts, and actions)
  2. Fake (pretend you’re not feeling tired or lazy, even if you are)
  3. Uptime (increasingly spend longer and longer in the thought-action defusion state)
  4. Zone (create a distraction-free environment you can be focused in)