Category Archives: Science

Learning the Art of Electronics: Constant Current BJT Circuit from AoE | In The Lab With Jay Jay

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This post is part of my video blog and you can find more information about this video.

Silly Job Title: Switch Sleuth. I am the Switch Sleuth!

In this video we continue working through Learning the Art of Electronics. Today we don’t do any course work, rather we do two exercises from the text, AoE ex 2.9 and 2.10 on page 86, and make a BJT-based current source as described in AoE Figure 2.32 on page 87.

These are the results I got as I varied the load resistance:

RL Ω VL V IL µA VBE V
1 0.06 0.0 -0.746
10 0.18 0.0 -0.745
100 1.21 0.0 -0.740
1k 5.41 0.0 -0.699
10k 7.54 4.9 1.145
100k 7.79 4.8 1.598
1M 7.88 4.9 1.637
10M 7.96 5.0 1.641

My notes are here:
John's notes for AoE ex-2.9
John's notes for AoE ex-2.10
John's notes for the circuit in AoE figure 2.32 A

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

We use the AiXun H314 Hot Air Gun for heat shrink.

We use the MUIN Solder Fume Extractor for fume extraction.

We use the Riden RD6006 Bench Power Supply for 10 V power input.

We use the EEVblog BM2257 Digital Multimeter to take measurements.

We use the Fluke 17B+ Digital Multimeter to take measurements.

We use the Peak Electronic Design Atlas DCA75 Pro Semiconductor Analyzer to check our NPN transistor pin out.

We use the Sharp EL-546L Scientific Calculator to crunch some numbers.

We use the ElectroCookie PCB Prototype Solderable Breadboard to build our circuits on.

We use the Multicomp Pro MP701033 Resistor Decade Box as a variable load resistor.

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

We use the Plato Model 170 Wire Cutter to trim component leads.

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! :)

p.s. today I added AoE to my spell check.

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!

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Unboxing #35: Unboxing the HP Prime CAS Graphing Calculator | In The Lab With Jay Jay

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Silly Job Title: Spark Specialist. I am the Spark Specialist!

In this video we unbox our HP Prime graphing calculator.

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MECHANIC UV Curing LightThis is an image of the product.notes

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Mail Call #62: Loot from AliExpress, Amazon, and eBay | In The Lab With Jay Jay

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Silly Job Title: Phase Phaser. I am the Phase Phaser!

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

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p.s. today I added BNC, BNC-SMA, Xylitol, html, Thermocouple, CAS, LCR, Brushless, IGBT, Triode, PWM, LiPo, LiFe/em>, NiMH, and NiCd to my spell check.

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Learning the Art of Electronics: Constant Current Reading from AoE and AoEx | In The Lab

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Silly Job Title: Connector Kingpin. I am the Connector Kingpin!

In this video we continue working through Learning the Art of Electronics. Today we don’t do any course work, rather we do selected readings about current sources found in the text.

Our reading from The Art of Electronics 3ed includes:

  • §2.2.6 pg 85-87 RE: resistor and BJT current sources
  • §4.2.5 pg 228-230 RE: op-amp current sources
  • §9.3.14 pg 620-623 RE: voltage-regulator current sources

And our reading from The Art of Electronics: The x Chapters includes:

  • §2x.2 pg 103-107 RE: Current-Source Problems and Fixes
  • §2x.3 pg 108-109 RE: The Cascode Configuration

Note that the 2nd edition of the x-Chapters is available for pre-order: The Art of Electronics: The x-Chapters 2.

When we continue next week we will do the various exercises we ran out of time to do today, and build some current sources, starting probably with a BJT version.

Thanks very much for watching! And please remember to hit like and subscribe! :)

p.s. today I added BJT and Cascode to my spell check.

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 13-in-1 Multi-function Digital Display USB Voltage Current Power MeterThis is an image of the product.

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Unboxing #33: Unboxing the ZeenKo LiteVNA64 Vector Network Analyzer | In The Lab With Jay Jay

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This post is part of my video blog and you can find more information about this video.

Silly Job Title: Electron Enchanter. I am the Electron Enchanter!

In this video we unbox the ZeenCo LiteVNA64 Vector Network Analyzer.

The specifications from the manufacturer are here: LiteVNA.

The user manual is here: LiteVNA User Guide.

You can download manuals, firmware, and software from here: LiteVNA Google Drive.

A related open-source software project is NanoVNA-Saver.

The books I have been reading to learn about the technology include A guide to the NanoVNA and What is Smith chart. Also “S-Parameter Techniques” by Hewlett-Packard.

Thanks very much for watching! And please remember to hit like and subscribe! :)

p.s. today I added NanoVNA to my spell check.

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 Metallic Craftwork PenThis is an image of the product.notes

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Learning the Art of Electronics: Fig 2N.4 Constant Current Investigation | In The Lab With Jay Jay

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Silly Job Title: Watt Wizard. I am the Watt Wizard!

In this video we continue working our way through Learning the Art of Electronics and continue 2N RC Circuits.

In this video we try to make a simple current source using only a transistor and a few resistors, for learning purposes. We don’t quite get the circuit running in the end, we will take another look at it soon.

In the back part of the video I take some time out to make some cables which I will use when we continue with this current source project in the near future.

The signal generator come current source which I mention in the video is this one: FNIRSI SG-002 Signal Generator.

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

We use the AiXun H314 Hot Air Gun to heat shrink.

We use the MUIN Solder Fume Extractor to clear the air.

We use the Tenma 72-10505 Bench Power Supply to provide power.

We use the Riden RD6006 Bench Power Supply to provide power.

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

We use the EEVblog BM036 Digital Multimeter to measure voltage.

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

We use the UNI-T UT116A Digital Tweezers to measure resistance.

We use the Peak Electronic Design Atlas DCA75 Pro Semiconductor Analyzer to check the pin out of our 2N2222 NPN transistors.

We use the Multicomp Pro MP701033 Resistor Decade Box as our variable resistor.

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

We use the Plato Model 170 Wire Cutter to trim component leads and cut heat shrink.

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! :)

p.s. today I added NPN to my spell check.

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!

XIASONGXIN LIGHT DT3 USB Cable TesterThis is an image of the product.

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Learning the Art of Electronics: Fig 2N.3 RC constant current | In The Lab With Jay Jay

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Silly Job Title: Chief Engineer. I am the Chief Engineer!

In this video we continue working our way through Learning the Art of Electronics and begin 2N RC Circuits.

Our notes are here:

John's notes

John's notes

We use the Rigol MSO5074 Mixed Signal Oscilloscope to monitor the changing voltage.

We use the EEVblog BM2257 Digital Multimeter to measure voltage.

We use the Fluke 17B+ Digital Multimeter to measure current.

We use the Multicomp Pro MP701033 Resistor Decade Box as our variable resistor.

We use the WilliamKlein Music Stand to hold our textbook.

We use the Carpenter Mechanical Pencil to make notes.

We use the Kaisi S-160 45x30cm Repair Mat as our workspace.

We use the FNIRSI SG-002 Signal Generator as our constant current source.

Thanks very much for watching! And please remember to hit like and subscribe! :)

p.s. today I added FNIRSI to my spell check.

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 3pcs Drill Scrub BrushThis is an image of the product.notes

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The Rain Detector | Project 18/30 | Maxitronix 30in1 | Learning Electronics In The Lab With Jay Jay

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Silly Job Title: Fixeruperer. I am the Fixeruperer!

In this video we do the 18th project from the Maxitronix 30in1 Electronics Project Lab Kit: The Rain Detector.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to investigate the tone signal.

We use the UNI-T UTi260B Thermal Imager to investigate thermals.

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

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! :)

p.s. today I added Fixeruperer to my spell check.

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!

Allsome QR040 ClampThis is an image of the product.

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Learning the Art of Electronics: 1O Breadboarding Hints and Tips | In The Lab With Jay Jay

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This post is part of my video blog and you can find more information about this video.

Silly Job Title: Tome Pumper. I am the Tome Pumper!

In this video we continue working our way through Learning the Art of Electronics and work through 1O Online Content: Breadboarding Hints & Tips.

The online content is here: https://laoe.link/LAoE_Chapter_01O.pdf

There is a bunch of related material here:

The order of magnitude for the multiplier bands on resistors is shown here:

Third and fourth band multipliers for resistor colour coding

Thanks very much for watching! And please remember to hit like and subscribe! :)

p.s. today I added breadboarding, ProtoBoard, DigiKey, solderless, stackable, IC, and colour to my spell check.

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 2-in-1 Dual Head WrenchThis is an image of the product.

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The Art of Computer Programming (TAOCP)

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Today I purchased the following ebooks for The Art of Computer Programming (TAOCP) by the venerable Donald Knuth: