An interesting summary of the history of electromagnetic waves.
How Radio Waves Were Discovered
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Category Archives: Learning
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 Pen notes |
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New Book Teardown #9: Basic Circuit Analysis 2nd Edition (2011) | In The Lab With Jay Jay
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: 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 KVM |
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Salvage Power Supply Parts Bipolar Supply
I like this bloke’s modular approach.
How to Find and Fix a Dead Battery Cell on KuKirin M4 Pro
Upgrading the PlayStation 1
Music from a Pencil | Project 12/30 | Maxitronix 30in1 | In The Lab With Jay Jay
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: 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 Brush notes |
Let’s go shopping!
Just train tired
Justin Sung’s D-F-U-Z method for Thought Action Defusion helps to decouple your productivity from your motivation:
- Distinguish (between feelings, thoughts, and actions)
- Fake (pretend you’re not feeling tired or lazy, even if you are)
- Uptime (increasingly spend longer and longer in the thought-action defusion state)
- Zone (create a distraction-free environment you can be focused in)
Making an automatic putting club
lol. This is over the top. :)
Removing IC when there’s no space around it
I’m gonna have to keep this in mind in case I ever need it.
https://www.youtube.com/shorts/OHONr8Hhogc