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Category Archives: Diary
Learning the Art of Electronics: 1L.4.1 Internal resistance of the movement | In The Lab
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: Tech Lead. I am the Tech Lead!
In this video we continue to work our way through Learning the Art of Electronics. In this video we continue with 1L Lab: DC Circuits and measure the internal resistance of our meter movement.
We use the METCAL PS-900 Soldering Station for soldering.
We use the Pro’sKit SS-331H Desoldering Pump to desolder (unsuccessfully).
We use the Riden RD6006 Bench Power Supply to provide 1V power for testing.
We use the Fluke 17B+ Digital Multimeter to measure current/voltage/resistance.
We use the EEVblog BM2257 Digital Multimeter to measure current/voltage/resistance.
We use the Brother P-Touch D210 Label Maker to label our circuit.
We use the Sharp EL-546L Scientific Calculator to calculate our values.
We use the ElectroCookie PCB Prototype Solderable Breadboard to make our circuit on.
We use the Multicomp Pro MP701033 Resistor Decade Box to provide test resistances.
We use the WilliamKlein Music Stand to hold our textbook.
We use the Carpenter Mechanical Pencil to take notes.
We use the Hakko CHP 3C-SA Precision Tweezers for tweezering.
We use the Plato Model 170 Wire Cutter to cut wires and trim leads.
We use the Kaisi S-160 45x30cm Repair Mat as our workspace.
The circuit I make in this video for interfacing the meter movement is JJ001:
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!
Fluke 17B+ Digital Multimeter |
Let’s go shopping!
Mail Call #53: Microphones, Diodes, Costumes, Markers, LED Filament, Heat Inserts 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: Spark Specialist. I am the Spark Specialist!
In this video we take a look at what arrived in the mail from AliExpress and Amazon:
- 10PCS Condenser pick-up Microphone 9x7mm 9767 9×4.5mm 9745 6x5mm 6050 6×2.2mm 6022 4.5×2.2mm 4522 4×1.5mm 4015 MP3 Accessories (9x7mm microphone)
- Rectifier Diode Sample Book SMD SMA Assortment Kit 24 Values Schottky diodes M1 M4 M7 SS12 SS14 SS16 SS24 SS34 SS36 SS110 SS210 (24valuesX50pcs)
- TOGROP 4Pcs Doctor Scientist Lab Costume for Kids Role Play Thick White Coat Birthday Party Gift 2-12 Years (Colour Name: White; Size Name: 5-6T)
- 5pcs White Acrylic Marker,Permanent Pen Art Supplies for Black Paper,Tire,Plastic,Stone,Metal,Painting for Artists,Beginners (5pcs, CHINA)
- LED Same End Filament Flexible Ultra Slim 3V Spiral Bulb Filament Retro Edison Bulb Lamp Parts Diode Lighting Strip Decoration (6500K, 300mm)
- M2 M2.5 M3 M4 M5 M6 Brass Heat Insert Nut Hot Melt Nutinsert Thread Knurled Double Twill Embedment Nuts 3D Printer Accessories (80 Pcs)
- 8pcs Black and White Acrylic Paint Markers Set, Large Ink Capacity, Acrylic Markers for Illustration Sketching, Wood, Glass, Fab (4black4white, CHINA)
- 60Pcs Wire Thread Insert M3 M4 M5 M6 M8 M10 M12 Fastening Thread Insert Stainless Steel Spiral Wire Screw Sleeve Wear Repair Kit (60Pcs)
- 6PCS Sculpting Pottery Clay Tools Wood Handle Pottery Set Wax Carving Sculpt Smoothing Shaper Pottery Clay Ceramic Tool (6pcs)
- Heat Insert Nut Iron Tip Heat Set Insert Tips Soldering Iron Tips M2 M2.5 M3 M4 M5 M6 Brass Thread Embedded Kit 3D Printer Parts (Color: 1set heat insert nut)
- Heat Insert Nut Iron Tip M2 M3 M4 M5 M6 M8 Brass Thread Embedded Kit Heat Insertion Tool for Plastic 3D Printer Soldering Iron
- Angled Type Hose Plier Car Auto Fuel Vacuum Line Tube Hose Remover Separator Pliers Pipe Hand Tool (Color: Red)
- safety Test Clip Insulation Piercing Probes Clip Piercing Test Clip For Car Circuit Detection Diagnostic Tool test Clip Cable (type1)
- Heat Set Insert Soldering Iron Tip Head M2 M2.5 M3 M4 M5 M6 Hot Melt Insets Nut Brass Embedded Thread Insertion Kit For Plastic (7Pc Heat insert tips)
- 2Pcs 1M Double End Test Lead Wire Line Electrical Voltage 4mm Banana Plug Alligator Clip Crocodile 15A Multimeter DIY Test Wires
- safety Test Clip Insulation Piercing Probes Clip Piercing Test Clip For Car Circuit Detection Diagnostic Tool test Clip Cable (Color: type1)
- Thread Checker Screw Measurement Ruler Stainless Steel Caliper Metric Gauge Tool For Measuring Screw Pitch Bit Bolt Nut Screw (White)
- 10Pcs Diagnostic Tools Multimeter Test Lead Extention Back Piercing Needle Tip Probes Autotools Automotive Kit Machine 0.7MM (Length: 10Pcs)
- MOTARRO 1Pcs Rectangle Paint Tray Metal Palettes for Acrylic Oil Paint Watercolor Craft Professional DIY Art Painting Palette (MP166-4)
- 10pcs Disposable Plastic 5ml Injector Syringe No Needle for Lab Nutrient Measuring Small Pet Food Feeder (Without Needle) 2024
- Glue Applicator Syringe with Blunt Tip Needle and Cap, for Liquid, Glue, Ink, Perfume, Lip Gloss Making (Lead Color: 1 set)
- ANENG PT2003 Pen Extension Needle Tip 1 Pair Probe Tip Test Fine tip 1000V/10A Bendable Probe Detachable Accessories Tester Tool (Color: PT2003)
- ANENG PT2002 Insulation Piercing Needle 1mm Pin Non Destructive Multimeter Test Probe 10A 600V For 2mm Test Lead (Color: PT2002)
- 20Pcs SOT23 SOT23-3 Turn SIP3 Double-Side SMD Turn DIP SIP3 Adapter Converter Plate SOT SIP IC Socket PCB Board DIY Kit
- 1pcs/lot 14 16 18 20 24 28 32 40 P Pin 2.54 MM Green DIP Universal ZIF IC Socket Test Solder Type IC lock seat zif socket (40Pin Narrow)
- 1pcs/lot 14 16 18 20 24 28 32 40 P Pin 2.54 MM Green DIP Universal ZIF IC Socket Test Solder Type IC lock seat zif socket (40Pin wide)
- 100Pcs PH 2.0 Pitch JST 2Pin Male and Female Housing Connectors PH 2.0mm 2P Electrical Wire Connector (Right Angle)
- 10/50X 304 Stainless Steel Cross Recess Phillips Pan Round Head Flat End Self Tapping Screw M1.2 M1.4 M1.7 M2 M2.6 M3 M3.5 M4 M5 (50pcs M3, 16mm)
- 10/50X 304 Stainless Steel Cross Recess Phillips Pan Round Head Flat End Self Tapping Screw M1.2 M1.4 M1.7 M2 M2.6 M3 M3.5 M4 M5 (50pcs M3, 12mm)
- PLCC IC Chip Extractor Component Puller Removal Tool and Vacuum Suction Pen IC Pickup Pen for PCB Circuit Board Repair Tools Kit
- 1.8 inch/2.4 inch TFT LCD Display with EC11 Rotary Encoder Combined Module and SPI Interface ST7735S ST7789 for Arduino (Color: 1.8 inch)
- 1.8 inch/2.4 inch TFT LCD Display with EC11 Rotary Encoder Combined Module and SPI Interface ST7735S ST7789 for Arduino (Color: 2.4 inch)
- BST-66 Flying Wire Repair Spot Solder Pad + Soldering Pin for Mobile Phone IC BGA PCB Solder Pad Repair Pad Soldering Point Tool (Color: BST-66)
- 10Pcs/Lot Single Row 40Pin 2.54mm Round Female Pin Header
For how to use the PLCC IC Chip Extractor see this video: PLCC IC Chip Extractor demonstration. #firmware #pcb #USA.
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 Precision Disassembly Screwdriver Kit With Spudgers |
Let’s go shopping!
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!
Old Book Teardown #19: Encyclopedia of Electronic Circuits Volume 6 (1995) | In The Lab
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: Technical Director. I am the Technical Director!
In this video we take a look inside Encyclopedia of Electronic Circuits Volume 6 by Rudolf F. Graf and William Sheets.
Some circuits of interest included:
| Page | Circuit |
|---|---|
| 387 | Heartbeat Transducer |
| 531 | Geiger Counter |
| 663 | FM Bug |
And some new terms that we learned were:
- AGC: Automatic Gain Control
- ALC: Automatic Level Control
- IF: Intermediate Frequency
- He: Helium
- Ne: Neon
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 TE-801 Third Hand notes |
Let’s go shopping!
Mail Call #52: Maker Advent Calendar, Banana Cables, Test Probes, Brushes and More! | In The Lab
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: Fixeruperer. I am the Fixeruperer!
In this video we take a look at what arrived in the mail from AliExpress, Amazon, and The Pi Hut:
- Maker Advent Calendar – The 12 Projects of Codemas (inc. Raspberry Pi Pico H)
- Zero: The Biography of a Dangerous Idea
- Mothers Choice Outlet Plug Protectors (24 Pack)
- Cleqee P1036B 4mm Banana To Banana Plug Test Lead Kit for Multimeter Match Alligator Clip U-type & Puncture Test Probe Kit (Color: 30PCS Test Lead Kit)
- 15pcs Automotive Diagnostic Test Probe Puncture Needles Oscilloscope Probe Pins Set Repair Tool Accessories
- 304 Stainless Steel Flat Washer M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14-M22 Metal Gasket Meson Sealing Plain Washers Spacer Shim (M3x15x0.8 x20pcs, M3x9x0.8 x50pcs, M3x8x0.8 x50pcs, M3x7x0.5 x100pcs)
- 10/50X 304 Stainless Steel Cross Recess Phillips Pan Round Head Flat End Self Tapping Screw M1.2 M1.4 M1.7 M2 M2.6 M3 M3.5 M4 M5 (50pcs M3, 8mm)
- A Set Chinese Calligraphy Brush ceramics Hook Line Fine Paint Brush Pen Weasel Mouse Whisker Stone Badger Hair Paint Brush (Color: 3Pcs)
- 00000 Fine Tip Paint Brush Set for Acrylic, Models, Mini Miniature Detail , Nylon Hair Thin Extra Fine Paintbrushes (Color: 6pcs)
- MAX7219 Dot Matrix Module 32×8 4 in 1 LED Display Modules Drive with 5Pin Wires for Arduino Raspberry Pi (Color: red)
- 15Pcs/Set Sandpaper 400 600 3000 800 1000 1200 1500 2000 2500 Grit Sand Paper Water/Dry Sanding Paper Abrasive Tools
- 5pcs White Acrylic Marker,Permanent Pen Art Supplies for Black Paper,Tire,Plastic,Stone,Metal,Painting for Artists,Beginners (Color: 5pcs)
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 IC Puller |
Let’s go shopping!
Learning the Art of Electronics: 1L.2.4.1 Measure Your DVM’s current output in diode test mode | In The Lab
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: Wattage Warlock. I am the Wattage Warlock!
In this video we continue to work our way through Learning the Art of Electronics. In this video we continue with 1L Lab: DC Circuits and measure our DVM’s current output in diode test mode.
We use the Fluke 17B+ Digital Multimeter for voltage and current measurements.
We use the EEVblog BM2257 Digital Multimeter for voltage and current measurements.
We use the Carpenter Mechanical Pencil to take 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 9 in 1 Air Quality Meter |
Let’s go shopping!
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!
Electronics Project #22: DC Barrel Female Into Hook-Clips | 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: Solder Soldier. I am the Solder Soldier!
In this video we make a power cable running a DC barrel female socket into hook-clips.
We use the METCAL PS-900 Soldering Station for soldering.
We use the Riden RD6006 Bench Power Supply to provide power for testing.
We use the EEVblog BM2257 Digital Multimeter to test the cable.
We use the Hakko CHP 3C-SA Precision Tweezers for tweezering.
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 Octopus Soldering Third Hand |
Let’s go shopping!
Old Book Teardown #18: Encyclopedia of Electronic Circuits Volume 5 (1994) | In The Lab
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: Switch Switcher. I am the Switch Switcher!
In this video we take a look inside Encyclopedia of Electronic Circuits Volume 5 by Rudolf F. Graf and William Sheets.
Some circuits of interest included:
| Page | Circuit |
|---|---|
| 150 | Bug Detector |
| 224 | IR Pulse Audio |
| 256 | Simple Lie Detector |
| 257 | Chapter 49: Light Comms |
| 326 | Voice Disguiser |
| 373 | Chapter 61: Moisture and Fluid Detectors |
| 554 | Speech Scrambler |
| 556 | Chapter 93: Sound Effects |
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!
Yizhan Digital Microscope notes |
Let’s go shopping!