Category Archives: Diary

Learning the Art of Electronics: 1L.4.1 Internal resistance of the movement | In The Lab

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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:

Photo of circuit JJ001

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Fluke 17B+ Digital MultimeterThis is an image of the product.

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Mail Call #53: Microphones, Diodes, Costumes, Markers, LED Filament, Heat Inserts and More!

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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:

For how to use the PLCC IC Chip Extractor see this video: PLCC IC Chip Extractor demonstration. #firmware #pcb #USA.

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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 SpudgersThis is an image of the product.

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Module Monday #8: HW-038 Water Level Sensor Module | Learning Electronics In The Lab With Jay Jay

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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.

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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 BrushesThis is an image of the product.notes

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Old Book Teardown #19: Encyclopedia of Electronic Circuits Volume 6 (1995) | In The Lab

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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

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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 HandThis is an image of the product.notes

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Mail Call #52: Maker Advent Calendar, Banana Cables, Test Probes, Brushes and More! | In The Lab

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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:

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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 PullerThis is an image of the product.

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Learning the Art of Electronics: 1L.2.4.1 Measure Your DVM’s current output in diode test mode | In The Lab

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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 MeterThis is an image of the product.

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Module Monday #7: HW-028 Rain Drops Sensor Module | Learning Electronics In The Lab With Jay Jay

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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:

Also we noted the use of the LM393 comparator on the module.

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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 SetThis is an image of the product.

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Electronics Project #22: DC Barrel Female Into Hook-Clips | In The Lab With Jay Jay

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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 HandThis is an image of the product.

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Old Book Teardown #18: Encyclopedia of Electronic Circuits Volume 5 (1994) | In The Lab

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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

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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 MicroscopeThis is an image of the product.notes

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Mail Call #51: Stamp Breakout Boards, DIY Telegraph Machine, PTZ Mount with Servos, and More!

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Silly Job Title: Lightning Tamer. I am the Lightning Tamer!

In this video we take a look at what arrived in the mail:

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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 MatThis is an image of the product.

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