Category Archives: Notes

Old Book Teardown #20: Encyclopedia of Electronic Circuits Volume 7 (1999) | In The Lab

Posted on by
Reply

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: Charge Changer. I am the Charge Changer!

In this video we take a look inside Encyclopedia of Electronic Circuits Volume 7 by Rudolf F. Graf and William Sheets.

Some circuits of interest included:

Page Circuit
385 DTMF Infrared Transmitter
524 FET Tester
916 Electronic Parrot
925 Voice-Effects Simulator Circuit

And some new terms that we learned were:

  • VFO: Variable-Frequency Oscillator
  • LM3914, LED Driver, similar to LM3915 and LM3916
  • MMIC: Monolithic Microwave Integrated Circuit
  • Balun: balanced to unbalanced; balancing unit
  • NE602: signal processing IC

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 29 In 1 Mini Precision Screwdriver SetThis is an image of the product.notes

Let’s go shopping!

The Transistor and “Amplification” | Project 6/30 | Maxitronix 30in1 | In The Lab With Jay Jay

Posted on by
Reply

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 Sleuth. I am the Switch Sleuth!

In this video we continue to work through our Maxitronix 30in1, today doing project #6: The Transistor and “Amplification”. In this project we see how an NPN transistor acts as an amplifier.

The HFR trigger coupling I use at the end of the video is called High Frequency Reject, it hides high frequency components from the triggering system and in this case fixed our triggering issue. I haven’t used HFR trigger coupling before. The Rigol user manual for the MSO5000 series doesn’t explain the feature, it just says: “HFR: rejects the high frequency components”.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to examine our input and output voltages, and also to provide a test sine wave for input.

We use the UNI-T UTi260B Thermal Imager to look at the thermals, but there wasn’t anything really to see.

We use the UNI-T UTG962E Signal Generator to provide an input signal, but we couldn’t get it to work properly so we used the signal generate from the scope instead.

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!

3ELIGHTING 10″-26″ VESA Wall MountThis is an image of the product.

Let’s go shopping!

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

Posted on by
Reply

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:

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 SpudgersThis is an image of the product.

Let’s go shopping!

Learning the Art of Electronics: 1L.3 Voltage divider | Learning Electronics In The Lab With Jay Jay

Posted on by
Reply

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: Note Taker. I am the Note Taker!

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 make a voltage divider.

We use the METCAL PS-900 Soldering Station for soldering.

We use the Riden RD6006 Bench Power Supply for 15V power.

We use the Fluke 17B+ Digital Multimeter to measure voltage and resistance.

We use the EEVblog BM2257 Digital Multimeter to measure voltage and current.

We use the Brother P-Touch D210 Label Maker to label our circuit.

We use the ElectroCookie PCB Prototype Solderable Breadboard to make our circuit on.

We use the Multicomp Pro MP701033 Resistor Decade Box for variable resistance.

We use the WilliamKlein Music Stand to hold our textbook.

We use the Scotch Titanium Scissors to cut, cut, cut.

We use the Carpenter Mechanical Pencil to make notes.

We use the Hakko CHP 3C-SA Precision Tweezers for tweezering.

We use the Plato Model 170 Wire Cutter to cut, cut, cut.

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!

MECHANIC Hard BrushThis is an image of the product.

Let’s go shopping!

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

Posted on by
Reply

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 BrushesThis is an image of the product.notes

Let’s go shopping!

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

Posted on by
Reply

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 HandThis is an image of the product.notes

Let’s go shopping!

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

Posted on by
Reply

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:

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 PullerThis is an image of the product.

Let’s go shopping!