I have a new post on Hackaday: Barcodes, “Lasers”, And Fourier Transforms.
Category Archives: Writing
Module Monday #8: HW-038 Water Level Sensor Module | 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.
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 Brushes notes |
Let’s go shopping!
Making Actually Useful Schematics In KiCad
I have a new post on Hackaday: Making Actually Useful Schematics In KiCad.
Internet Archive Hits One Trillion Web Pages
I have a new post on Hackaday: Internet Archive Hits One Trillion Web Pages.
Exploring The Performance Gains Of Four-Pin MOSFETs
I have a new post on Hackaday: Exploring The Performance Gains Of Four-Pin MOSFETs.
TMS9900-based Home Brew Computer
I have a new post on Hackaday: TMS9900-based Home Brew Computer.
An Introduction To DC Motor Technology
I have a new post on Hackaday: An Introduction To DC Motor Technology.
Module Monday #7: HW-028 Rain Drops Sensor Module | 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.
You can support this channel on Patreon: patreon.com/JohnElliotV
Silly Job Title: Bench Master. I am the Bench Master!
In this video we take a look at the HW-028 Rain Drops sensor module: Separate PCB Board Raindrop Module Sensor Rising Water Level Detection Module Raindrop Sensor Board. Project doco is here: HW-028.
We found some instructions and tutorials, including these:
- Arduino – Rain Sensor – Servo Motor
- Arduino Modules – Rain Sensor
- Rain drop Sensor Module
- How to use the Raindrop Sensor Module
Also we noted the use of the LM393 comparator on the module.
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!
Galacok 12 Pcs Magnetic Phillips Screwdriver Set![]() |
Let’s go shopping!
Making A Machine To Sort One Million Pounds Of LEGO
I have a new post on Hackaday: Making A Machine To Sort One Million Pounds Of LEGO.
The Transistor, an Electronic “Trigger” | Project 5/30 | Maxitronix 30in1 | In The Lab With Jay Jay
This post is part of my video blog and you can find more information about this video.
You can support this channel on Patreon: patreon.com/JohnElliotV
Silly Job Title: Power Provider. I am the Power Provider!
In this video we continue to work through our Maxitronix 30in1, today doing project #5: The Transistor, an Electronic “Trigger”. In this project we see how an NPN transistor works.
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!
Emenne 110111 Brush Holder![]() |
Let’s go shopping!


