I have a new post on Hackaday: Installing An 84MB Hard Drive Into A PDP-11/44.
Category Archives: Internet
Mail Call #51: Stamp Breakout Boards, DIY Telegraph Machine, PTZ Mount with Servos, and More!
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: Lightning Tamer. I am the Lightning Tamer!
In this video we take a look at what arrived in the mail:
- Stamp: Modular Breakout Boards for Easy Prototyping
- 1/5PCS NRF24L01 Wireless adapter Module 3.3V New Socket Adapter plate Board 8Pin For arduino Robot Car 24L01 Wireless Module (5pcs)
- Data Extension Cable Cable for X Box Classic Ultra ATA UDMA 39P 80-Wire Computer Storage Device 3.5 IDE HDD DVD-Rom 2-Drive 64CM (this is two IDE cables and a gender changer, long enough for OG Xbox!)
- MaAnt MY-065 Nano Cleaning Sponge Dust-free Wipes Tool for Mobile Phone Screen Glue Removal/Camera/PCB Welding Flux Oil Cleaner (Color: MY-065)
- Photoelectric Beam Speed Sensor Module 3.3V-5V Slot-Type Optocoupler Tacho-Generator Counter For Arduino/51/AVR/PIC Diy Kit (Color: Black) and (Color: Blue)
- 2×4 Keypad 4×2 Keypad 8 Push Buttons V1.00 Key Board Matrix Keyboard Button for Arduino AVR PIC 2*4 Module AVR PIC NEW
- 15 Meter Heat-resistant Flame Retardant Tape Coroplast Adhesive Cloth Tape For Car Cable Harness Wiring Loom Protection (Width: 19mm, Color: black, Length: 15m)
- High Temperature Wire Harness Cloth Tape Automotive Cable Loom Heatproof Fabric Adhesive Tape for Engine Electrical Insulation (Width: 19 mm, Color: Black, Length: 15 m)
- Educational Glass Prism – Spectral Reflection, Ideal Teaching and Photography Tool, Perfect Gift for Science Enthusiasts
- T-type 3mm to 6mm hand tap wrench thread tapping tool set hand wrench thread tapping M6 to M8 tool set
- Precision Titanium Alloy Tweezers Professional Repair Fingerprint Fly Line Phone Motherboard Antimagnetic Electronics Forceps (Tweezer Tip Type: Bending) and (Tweezer Tip Type: Straight)
- A Set Chinese Calligraphy Brush ceramics Hook Line Fine Paint Brush Pen Weasel Mouse Whisker Stone Badger Hair Paint Brush
- 50Pcs 5mm 4mm 3mm Clear 12V Mini Bulb Of Wheat Rice Bulbs Switch Button Bulbs Indicator Bulb Tungsten Lamp Accessories (Emitting Color: 50Pcs 3MM-12V) and (Emitting Color: 50Pcs 4MM-12V) and (Emitting Color: 50Pcs 5MM-12V)
- Smart Robot Tilt Vibration Sensor Module Vibration Switch Alarm Module for arduino Diy Kit
- SW-420 Normally Closed Alarm Vibration Sensor Module Vibration Switch SW420 For Arduino
- 1+4PCS/5PCS Pen Knife Mini Pressing Engraving Pen Ins Mini Account Sticker Art Knife Paper Art Knife Pen Cutting Paper Knife (Color: GREY)
- Children’s Science Technology Small Production Diy Telegraph Machine in the Science Experiment Equipment Stem Education Model
- PTZ Ultrasonic Aviation Model Camera Installation FPV Camera Support Accessories Rc Aircraft Parts FPV Servo Gimbal Bracket
- Stripping Pliers Decrustation Wire Cable Tools Stripper Stainless Steel Hexagon Wrench Accessorie Insulated Electrical Straight
- LED Same End Filament Flexible Ultra Slim 3V Spiral Bulb Filament Retro Edison Bulb Lamp Parts Diode Lighting Strip Decoration (Emitting Color: Green)
- 10-100/PCS New 2N3819 TO-92 N-channel field-effect transistor In Stock
- TCS3472 Color Sensor Recognition Module RGB IIC Color Light Sensor Development Board with IR Filter for Arduino STM32 30
- 1PCS 4×4 4*4 Matrix Keypad Keyboard module 16 Botton mcu For Arduino
- DIY Electronic Kits Wireless Stereo FM Radio Receiver Module PCB 76MHz-108MHz DC 1.8V-3.6V
- 1/5/10pcs Five-way Navigation Key Module Independent Keyboard Key Switch Button 5D Joystick Microcontroller
- Black Electrical Fabric Tape Heat Resistant Wire Harness Bundle Insulation Auto Wiring Cloth Wrap Waterproof Cable Adhesive Tape
- Easy to Use Laser Level Line Tool Multipurpose Laser Level Kit Standard Cross Line Lase 8 Feet Measure Tape Ruler
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 A5 Cutting Mat![]() |
Let’s go shopping!
Electronics Project #21: DIY Telegraph Machine | 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: Joule Juggler. I am the Joule Juggler!
In this video we assemble the Children’s Science Technology Small Production Diy Telegraph Machine in the Science Experiment Equipment Stem Education Model.
The instructions were easy enough to follow, given they are in Chinese! We get the two circuits working perfectly. Really impressed with this one, it works like a charm! Didn’t do any range testing or what not, I’m going to do this one again when my little people come to visit.
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!
MROOFUL Carpenter Mechanical Pencil![]() |
Let’s go shopping!
2025 Component Abuse Challenge: Using Inductors To Steal Power From Qi Wireless Charging Base Station
I have a new post on Hackaday: 2025 Component Abuse Challenge: Using Inductors To Steal Power From Qi Wireless Charging Base Station.
The Mathematics of General Relativity
Making RAM For A TMS9900 Homebrew Computer
I have a new post on Hackaday: Making RAM For A TMS9900 Homebrew Computer
Resistor vs Capacitor vs Inductor
HTTP Verbs
You only need GET (and its little brother HEAD) and POST. Whether operations on a resource are idempotent or not is something that you might like to change. Send all operations through POST which will apply business logic and don’t use PUT or DELETE. Simple.
Module Monday #4: KY-035 Analog Hall Effect Sensor Module | 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: Buzz Boss. I am the Buzz Boss!
In this video we take a look at the 1-10pcs KY-035 Analog Hall Magnetic Sensor Module 49E For Arduino.
You can learn more about the Hall effect which is basically a magnetism detector.
The code for this Arduino sketch is here: 2025-10-27-KY-035-analog-hall-effect.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!
Damotk 5pcs Crevice Cleaning Brush notes |
Let’s go shopping!
Filming At The Speed Of Light, About One Foot Per Nanosecond
I have a new post on Hackaday: Filming At The Speed Of Light, About One Foot Per Nanosecond.


