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

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Silly Job Title: Circuit Breaker. I am the Circuit Breaker!

In this video we continue working through Learning the Art of Electronics. Today we build the circuit from Fig-2N.4 which is a manually switched constant current ramp.

The constant current sources we’re using are these: LT3092 Adjustable Precision Current Source Module, 200mA / 500mA Adjustable Constant Current Source Module, LED Driver.

The other constant current sources I have but that we aren’t using today are these: LT3092 Adjustable Constant Current Source Module 200mA Continuous Adjustable Constant Current Output, Sensor Drive Power Supply.

The box I put everything is the 82x52x35mm-Black box from here: 70/100mm DIY Electrical Enclosure Box Electronic Project Case White Black Grey Instrument Storage Junction Controller Box.

The spanners I mention that I purchased recently are these: 3mm Ultra-thin Open Box Dual-purpose Wrench Set 6-24mm Stainless Steel Spanner Metric Ratcheting Combination Wrench Kit with Bag (6-24mm 12pcs kit).

We use the Rigol MSO5074 Mixed Signal Oscilloscope to investigate Vout.

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 to clear the air.

We use the Yizhan Digital Microscope for close ups.

We use two Riden RD6006 Bench Power Supplies to provide positive and negative power.

We use the EEVblog BM2257 Digital Multimeter for continuity testing.

We use the Brother P-Touch D210 Label Maker for labeling.

We use the nmsafety Nitrile Gloves for hand protection.

We use the ENGINEER PA-09 or PA-21 Crimping Tool for crimping.

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!

DTBD WrenchThis is an image of the product.

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Unboxing #36: Unboxing the MESTEK EMF02R EMF Meter | Learning Electronics In The Lab With Jay Jay

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Silly Job Title: Energy Elicitor. I am the Energy Elicitor!

In this video we take a look at my new MESTEK EMF meter which I purchased recently from AliExpress: Mestek Emf Meter Electromagnetic Field Radiation Detector Rechargeable Counter Emission Dosimeter for Mobile Phone and Computer. I got the EMF02R model.

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 CrowbarThis is an image of the product.

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Mail Call #63: Loot from AliExpress & Amazon, Periodic Table & Electronics | In The Lab

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

Silly Job Title: Charge Changer. I am the Charge Changer!

In this video we take a look at what has arrived in the mail from Amazon and AliExpress.

I mention in the video about the September 2026 edition of Silicon Chip magazine. I am reading Fundamentals of Solid State which you can purchase for AUD$40 on the Silicon Chip website from the bottom of this page. In the video I say that it dates back to 1979, but actually it dates back to 1984. Close enough! If you’re not into paywalled content they have some free downloads including The Internet – What’s In It For You?, When I Think Back 1, and When I Think Back 2.

The cheatsheet I mention is Periodic Table Advanced. I have a bunch of these QuickStudy cheatsheets.

The stuff from Amazon is:

The stuff from AliExpress is:

If you’re interested in the CH341A programmer you might like to learn how to mod it for low voltage.

The various current sources, voltage references, and transistors which arrived in the mail today were the purchases I made for the equipment we looked at from The Art of Electronics.

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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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!

Yum Cha Stainless Steel SpudgerThis is an image of the product.

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Unboxing #35: Unboxing the HP Prime CAS Graphing Calculator | 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: Spark Specialist. I am the Spark Specialist!

In this video we unbox our HP Prime graphing calculator.

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

Update: there was some confusion when I made this video. I ordered the G2 model but when it arrived I couldn’t find any G2 branding on my device so I mistakenly thought I had been sent a G1 instead. In fact I had not. I did in fact receive a G2, it’s just that the G2 branding was very subtle and I missed it. The only indication seems to be a small “G2” on the back under the HP logo. Also I heard that the G2 model came with a USB-C connection, but that is wrong. My G2 has a USB-Micro connection, which I believe is standard.

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 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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You can support this channel: patreon.com/JohnElliotV

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

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

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

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

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.

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 Half Round Nose and Half Groove PliersThis is an image of the product.

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