Electronics Project #1: ALKOY Capacitor Discharge Pen Teardown | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

Silly Job Title: Electron Herder

This video is a teardown of the ALKOY Capacitor Discharge Pen which I did for YouTube user t1d100 who asked me about it over here: Demo of the ALKOY Capacitor Discharge Pen | In The Lab With Jay Jay.

I made a bunch of mistakes while making this video, so please bear with me. I tried to add some captions to explain things when I went wrong.

The discharge pen that I have was purchased from Amazon Australia here: 1000V Portable Capacitor Discharge Pen High Voltage Quick Discharging Tool Constant Discharge Pen Electronic Repairs Discharge Pen ALKOY.

There seems to be a similar product available from Amazon USA here: YEKMLCO Capacitor Discharge Pen Fast Discharging High Voltage 1000V Repair Tool Discharger for Electronic Safety Intelligent (affiliate link).

In the video you can watch me break this thing open. I didn’t exactly know how to do it, and I permanently damaged the device while opening it. In the end I wasn’t 100% sure what the safe and proper way to open these things really is. Giving it a mighty pull might work, otherwise you will need to leverage off some friction locks.

Before I broke the device open I tried to measure the resistance across its probes, but all three measurement devices reported open circuit. The device doesn’t seem to engage the resistor until it detects a voltage.

Eventually I got the device open, you can see some photos of the circuit board below, and I make some attempt to identify the components.

The MB10F on the top is a bridge rectifier, the M7F in the middle is a rectifying diode, and the resistor at the bottom is 2MΩ. In the video I say that the resistor is a “two ohm resistor”, but it is actually a “two MEGA ohm resistor” (I knew that, I just misspoke).

I’m not 100% sure what the CS01N100 A3R is, but it seems than an CS01N100 A4R is a silicon N-Channel Power MOSFET, so I think that’s probably what that is.

As I broke this device during the teardown I have purchased myself a replacement device for AU$23.02.

In the video I use the following equipment (affiliate links where possible):

Mini Digital Tweezers Miniware DT71 Mini Digital Tweezers Smart SMD LCRDVF Tester Multimeter Signal Generator for Measuring Components
SMD Digital Tweezers UNI-T UT116A Digital Tweezers Smart SMD Tester Electrical Multimeter Resistance Capacitance Continuity Diode Test Meter
Component Tester FNIRSI DSO-TC3 Digital Oscilloscope Transistor Tester 10MS/s Sampling Rate 500kHz Bandwidth Support Diode LCR Detect Signal Generator
Soldering Station Horusdy 2in1 Soldering Station Solder Iron Rework Hot Air Blower Digital SMD Display + 11 Tips, 4 Nozzles & Tweezer Set
Mini Screwdriver Set Legion Tools Precision Mini Screwdriver Set 11pc Jeweller Laptop Phone Watch Repair Tool
Repair Mat Kaisi Heat Insulation Silicone Repair Mat with Scale Ruler and Screw Position for Soldering Iron, Phone and Computer Repair Size: 13.7 x 9.8 Inches
Desoldering Pump Kaisi Professional Solder Auxiliary Tool 6 piece double-sided repair tool with Desoldering Wick & Desoldering Pump
Craft Knife Precision Craft Knife Set 52pcs Professional Razor Sharp Knives for Art, Hobby

In the video I have trouble with the connections into the DSO-TC3, the connections are documented here: FNIRSI DSO-TC3.

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 52 in 1 Tiger WrenchThis is an image of the product.notes

Let’s go shopping!

Channel News #1: Stetmann Cosplay Costume Reveal | 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 on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

Silly Job Title: Craig Entertainer

Here it is! As planned, my new costume! Just for fun when I record electronics videos in my lab I’m gonna dress myself up like Egon Stetmann the scientist from StarCraft II:

The cosplay costume reveal is in this video. Also some news and discussion about the goals for the channel over the longer term.

As mentioned in this video I will have a new job title for my ID card for each video. The inaugural job title is Craig Entertainer, for my only regular reader, Craig. :)

Here are some affiliate links to the bits and pieces I got for the costume:

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!

aToolTour Extra Long Magnetic Drill Bit ExtensionThis is an image of the product.notes

Let’s go shopping!

Early Content #11: Demo of the ALKOY Capacitor Discharge Pen | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I demo my new ALKOY Capacitor Discharge Pen.

The bench multimeter I use in this video is my OWON XDM1041 and the bench power supply is my RIDEN RD6006.

The demo circuit used a 1KΩ 1/4W resistor, a 25V 330μF electrolytic capacitor, and an 18V supply.

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 Heat Shrink Wire ConnectorsThis is an image of the product.

Let’s go shopping!

Unboxing #5: Unboxing of AliExpress TE-801 Third Hand With Magnifier | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I unbox two “different” helping hands (AKA “third hand”) only to discover they are the same TE-801 model.

I purchased these separately on AliExpress:

They are exactly the same product so if you’re planning to purchase might as well get the cheapest option. Note that the first link above also has a separate more expensive option which is actually a different product, I didn’t get one of those.

In addition to unboxing these third hands I also add some 4mm heat shrink to the alligator clips to take the bite out of the teeth.

Note: in this video I have the annoying habit of calling “heat shrink”, “shrink wrap”. The correct term is heat shrink, shrink wrap is a different type of thing.

In the video I use 4mm yellow heat shrink:

The hot air gun I use is a part of my Horusdy Soldering Station.

The batteries I use are Duracell AAA batteries.

My gloves are:

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!

ENGINEER PA-09 Crimping ToolThis is an image of the product.notes

Let’s go shopping!

Early Content #10: Enameled Bodge Wire With UV Solder Mask | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I solder three different sized bodge wires onto some perfboard for practice and for the purpose of exposition. After attaching the three bodge wires I cover them with UV solder mask.

If you haven’t heard of the expression “bodge wire” before, ChatGPT will explain.

I want to thank my mate Bruce from Branchus Creations for recommending the enameled wire of various sizes, the Swann Morton blades, and the Amtech flux.

I got three rolls of this enameled copper wire from AliExpress:

The diameters of the various rolls I got were:

Size mm inches
Small 0.07mm 0.003″
Medium 0.16mm 0.006″
Large 0.31mm 0.012″

I got the “coppery” colour, not the red stuff.

The Swann Morton blade handles I got were these:

I got three types of blades in #15C, #15, and #10 sizes:

The #15C Swann Morton blade is the smallest and is so far my favourite. The #15C is the blade I use in this video.

My flux is:

The industrial/precision tweezers I mention in the video are these:

The solder lugs I refer to are these:

The perfboard I used in this video was a 2x8cm board which I picked up from AliExpress:

I use two microscopes in this video:

In the video I reference my thermal imager:

My gloves are:

My head-mounted magnifying glasses are:

The soldering iron I use in this video is a part of my Horusdy soldering station:

My desoldering pump came in this kit:

The solder mask I ordered was this green stuff, but the stuff they actually sent me was red:

The solder I use in this video is:

My paint brush is the 5/0 sized brush from this set:

The blow torch I mention in this video is this one:

My Kapton tape and tape dispenser are these:

The bench multimeter I use in the video is a:

  • OWON XDM1041 Bench Multimeter

The isopropyl (IPA) alcohol I use in this video is this stuff:

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!

Amazon Basics Ratchet ScrewdriverThis is an image of the product.notes

Let’s go shopping!

Early Content #9: OGXbox Recapping, Thermal Paste and Pro’sKit SS-331 Demo | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I recap an old OGXbox. I also redo the thermal paste. I use my Pro’sKit SS-331 desoldering pump in anger for the first time. I spend an inordinate amount of time trying to figure out my new tools. In the end the Xbox is still broken!

I sold this Xbox on eBay but it was returned to me during the warranty period (one month) as it was faulty.

In this video I mention a trick you can do in your browser when you’re watching videos on YouTube. Ordinarily the YouTube user interface only allows you to set playback speed to 2x, but if you want to set it at 3x or higher you can do so by pressing F12 to bring up developer tools, then open the Console, and enter this code:

document.querySelector("video").playbackRate = 3.0;

Change the number to change the playback speed.

In this video I mention that it was in a video from Bruce from Branchus Creations that I got the recommendation to try a beveled soldering iron tip. Having given it a bit of a go and not really having great luck with it I am going back to a small chisel bit instead.

I comment in the video about how you don’t need to replace the clock capacitor on a v1.6 board, but Harcroft on the ConsoleMods.org original-xbox Discord forum reminded me that sometimes you do need to replace this capacitor.

The capacitors I use for this recapping are Chong 6.3V 3300μF Low ESR caps. Of course the board didn’t work after recapping so it’s possible these are dodgy caps.

I’m pretty sure I did damage the tip on my desoldering pump by putting the temperature all the way up to 480°C. Maybe don’t do that yourself. I believe anything over 380°C can damage iron tips (basically they melt!).

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!

ZKETECH EBD-A20H Electronic LoadThis is an image of the product.notes

Let’s go shopping!

Unboxing #4: Unboxing of Pro’sKit SS-331 Desoldering Pump | In The Lab With Jay Jay

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

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I unbox my new Pro’sKit SS-331 desoldering pump.

I also recommend the Brother HT-D210 label maker.

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!

Logitech Brio USB CameraThis is an image of the product.

Let’s go shopping!

Unboxing #3: Unboxing of UNI-T UTi260B Thermal Imager with Macro Lens | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I unbox my new UNI-T UTi260B thermal imager with macro lens and compare it with my Noyafa NF-521 thermal imager.

I made a few mistakes with the production of this video, sorry about that. I made a mess of the side branding, I will have that fixed in future. And I managed to get my toes on camera. The height of professionalism!

In this video I refer to my lab equipment documentation. Particularly I mention the Jackcat Mini Cutter electric scissors.

Note: in the video I’m not sure what “ROI” means, but it turns out it means “region of interest”. The region of interest is a box in the middle of the display, and some settings apply to this area.

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 Heavy Duty Stainless Steel Wire BrushThis is an image of the product.notes

Let’s go shopping!

Unboxing #2: Unboxing of NBD Camera | 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 on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I unbox my new NBD Camera. It’s cheap and terrible. I mounted it with an Arkon Wall Mount. In a future video I will demo my new camera setup. After we’ve done that we will replace the batteries in my friend’s hair trimmer. Riveting stuff! Stay tuned!

Note: I was confused while making this video, I thought the camera was a “HBD” camera, but it’s an “NDB” camera, and you will see me getting that wrong. Not a super important detail…

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!

Maxitronix 130 In 1 (130in1) Electronics Project Lab KitThis is an image of the product.notes

Let’s go shopping!

Early Content #8: Making Input Power Cable for EBD-A20H Battery Tester | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I make an input power cable for my ZKE Tech EBD-A20H Battery Tester and Electronic Load. This power cable connects a DC female input to four male banana plugs, two positive, two negative. This power cable can be used to connect a power source for testing by the EBD-A20H.

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 Dual-Purpose Sanding StickThis is an image of the product.notes

Let’s go shopping!