This post is part of my video blog: In The Lab With Jay Jay.

In this video we conclude the Maxitronix 10in1 Electronic Project Lab.

This post is part of my video blog: In The Lab With Jay Jay.

In this video I do the tenth Maxitronix 10in1 Electronic Project Lab project: Burglar Alarm.

This post is part of my video blog: In The Lab With Jay Jay.

In this video I do the seventh Maxitronix 10in1 Electronic Project Lab project: Wireless Continuous Wave Transmitter.

While conducting this experiment I made some notes over here: Maxitronix/10in1/7.

I made a bunch of mistakes while building and testing this circuit, and a lot of the footage I took didn’t make it into the final video. In particular in between the construction part of the video at the beginning, and the testing part of the video at the end, I added a ceramic capacitor at the base of the transistor; I hadn’t understood the instructions to install this capacitor as it wasn’t wired in using spring terminals like all the other components.

This post is part of my video blog: In The Lab With Jay Jay.

In this video I do the third Maxitronix 10in1 Electronic Project Lab project: Diode Experiment.

When I looked at the resistor on the bottom I thought it was red – brown – black – gold which would have been 21Ω but I think I misread brown and that was actually purple which would be 27Ω which stacks better with the two measurements I made both of which said 27Ω.

In the video we examine the forward voltage of our germanium diode and get various readings. Typically a germanium diode should be around 0.3V versus silicon diodes which are usually around 0.7V.

The component testers we use are these:

• UNI-T UT116A Digital Tweezers Smart SMD Tester
• FNIRSI DSO-TC3 Component Tester

On the FNIRSI component tester the Ir is the “reverse current”, also known as the “leakage current”. This is the small amount of current which flows through the diode when it is reverse biased (that is, basically, connected the wrong way around).

I asked ChatGPT a few questions about diodes and their specifications which you can read here: Germanium Diode Forward Voltage if you’re at all interested in such things. Of course you should be doubly suspicious of anything you read on the internet. :)

The really amazing learning for me in this experiment was how hot the germanium diode got versus the lamp, which was so surprising. Just goes to show how good an idea it is to actually do experiments and measure things! The thermal imager we used was the UNI-T UTi260B.

Also I think I’m coming around to the view that an oscilloscope is a pretty poor voltmeter. My oscilloscope is an MSO5074 70MHz 4 Channel MIXED SIGNAL OSCILLOSCOPE and I love it but I think in future I will limit my use of the oscilloscope to situations where I’m actually dealing with some sort of oscillator. I think simple digital multimeters would have been better test equipment to use for the kinds of readings I was trying to take in this experiment.

I hope you enjoy the video. Stay tuned for the upcoming projects. If you’re interested in seeing them don’t forget to subscribe!

Also, if you’re interested in getting any of these Maxitronix kits yourself the best place I know to look is on eBay. Let me know if you find them somewhere else!

Here is a table of products I use which may appear in my video with affiliate links to vendors if you would like to buy. The link given here won’t necessarily have the best price so please do shop around to see if you can find a better deal. If you have thoughts or questions please feel free to let me know. Let’s go shopping!

Equipment	Affiliate Link	Notes
Rigol MSO5074 Mixed Signal Oscilloscope	MSO5074 70MHz 4 Channel MIXED SIGNAL OSCILLOSCOPES	notes
FILCO Majestouch 2SS 87-key mechanical keyboard	Tenkeyless 87-key: FILCO Majestouch 2SS Edition Tenkeyless English Layout Cherry MX Speed Silver Axis with 3 Red Key Locks, Black FKBN87MSS/ECSP2B-RKL	notes
gku Underdesk Keyboard Drawer	gku™ Underdesk Keyboard Drawer under desk keyboard tray and storage AC1009	notes
UNI-T UTi260B Thermal Imager	UNI-T UTi260B Infrared Thermal Imager 256 x192 Industrial Handheld Testing Thermometer For Repair Floor Heating Thermal Camera	notes
Leadstar 12″ LCD TV	Prechen 11.6 Inch Small HDMI Monitor 1366×768 Small PC Monitor TFT LCD Monitor Built-in Speaker with HDMI VGA AV BNC USB Input Mini HD Color Screen Display	notes
UPERFECT 15.6″ HDMI LCD	UPERFECT Portable Monitor 15.6″ Computer Display (100% sRGB High Color Gamut) 1920×1080 USB C Monitor FHD Eye Care Gaming Screen IPS Mini HDMI Type C OTG Dual Speaker VESA, Included Smart Cover Stand	notes
TOMLOV DM602 Pro Digital Microscope	TOMLOV DM602 Pro 10.1″ HDMI Digital Microscope 2000x, Pro Boom Arm Stand, LCD Soldering Microscope with 3 Lens, Adults Microscope for Electronics Repair, Coin Microscope Ring Light,PC Compatible, 64G	notes
Riden RD6006 Bench Power Supply	RD6018 RD6018W USB WiFi Digital Control Power Supply DC to DC Voltage Step Down Module Buck Converter Voltmeter 60V 18A	notes
OWON XDM1041 Bench Multimeter	Owon XDM1041/XDM1241 Digital Multimeter 55000 Counts High Accuracy Desktop Multimeters AC/DC Tester True RMS USB Multimeter	notes
ANENG AN-999S Bench Multimeter	ANENG AN-999S Desktop Voice Multimeter Digital 19999 Counts Professional Bluetooth Tester True RMS AC/DC Voltmeter Current Tools	notes
Hakko CHP 3C-SA Precision Tweezers	Hakko CHP 3C-SA Stainless Steel Non-Magnetic Precision Tweezers with Very Fine Point Tips for Microelectronics Applications, 4-1/4″ Length (5 Pack)	notes
Miniware DT71 Digital Tweezers	Miniware DT71 Mini Digital Tweezers Smart SMD LCRDVF Tester Multimeter Signal Generator for Measuring Components	notes
FNIRSI DSO-TC3 Component Tester	FNIRSI DSO-TC3 Digital Oscilloscope Transistor Tester 10MS/s Sampling Rate 500kHz Bandwidth Support Diode LCR Detect Signal Generator	notes
Brother P-Touch D210 Label Maker	Brother P-Touch D210 Handheld Label Maker TZe 3.5mm 6mm 9mm 12mm with Free Tape	notes
UNI-T UT116A Digital Tweezers	UNI-T UT116A Digital Tweezers Smart SMD Tester Electrical Multimeter Resistance Capacitance Continuity Diode Test Meter	notes
nmsafety Gloves	24Pieces/12 Pairs Work Gloves For PU Palm Coating Safety Protective Glove Nitrile Professional Safety Suppliers Color: PU1350NV -DMF	notes
Kaisi Repair Mat	Kaisi Heat Insulation Silicone Repair Mat with Scale Ruler and Screw Position for Soldering Iron, Phone and Computer Repair Size:17.7 x 11.8 Inches	notes
Kaisi 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	notes
MMOBIEL Helping Hands	LED Light Helping Hand Magnifier Station for Soldering, Assembly, Repair,Modeling, Hobbies and Crafts – 2.5X /4X LED Light – Hands-Free Magnifying Glass Stand – Incl. Clamp and Alligator Clips	notes
QWORK Helping Hands	QWORK Glass Stand	notes
Legion Tools Mini Screwdriver Set	Precision Mini Screwdriver Set 11pc Jeweller Laptop Phone Watch Repair Tool	notes
Kaisi Soldering Tools w/ Desoldering Pump	Kaisi Professional Solder Auxiliary Tool 6 piece double-sided repair tool with Desoldering Wick & Desoldering Pump	notes
Craft Knife Set	Precision Craft Knife Set 52pcs Professional Razor Sharp Knives for Art, Hobby	notes
Sudake SDK07 test clips	10X Universal Chip clamp micro IC clamp SOP SOIC TSOP MSOP SSOP SMD IC Test Clip pin Socket Adpter Programmer for logic analyzer	notes
Sudake SDK08 test clips	10pcs x Universal Chip IC clamp SOP SOIC TSOP MSOP SSOP SMD IC Test Clip Socket Adpter Programmer for logic analyzer	notes
Magnetic/Claw Pickup Tool	Magnetic Pick Up Tool LED Light Magnet 4 Claw Flexible Telescopic Grabber 62cm	notes
‎SWANLAKE Telescopic Magnetic Pick Up Tool	Telescopic Magnetic Pick Up & Swivel Inspection Mirror Set Round, Round Mirror Pen Style Magnet Auto Hand Tools	notes
‎SWANLAKE Telescopic Swivel Inspection Mirror	Telescopic Magnetic Pick Up & Swivel Inspection Mirror Set Round, Round Mirror Pen Style Magnet Auto Hand Tools	notes
Digital meter	Digital Voltmeter Ammeter DC 100V 10A Amp Voltage Current Meter Tester 0.28 Inch Dual LED Display Panel with Connect Wires
Telescopic magnet	1pc 8lb Orange Red Handle Magnetic Pickup Stainless Steel Antenna Retractable Suction Iron Rod Strong Magnetic Suction Rod Tools
Dismantling tools	22 In 1 Multifunctional Disassembly Tool Mobile Phone iPad Laptop Screwdriver Maintenance Kit Repair Tools Opening Set For Hand
Telescopic Magnetic Pickup w/ Light	Telescopic Pickup Magnetic Iron Rod Household Automotive Repair And Inspection Tool Strong Magnetic Metal Screw Suction Rod
Knife blades	100/50pcs Knife DIY Wood Carving Fruit Food Scalpel Craft Sculpture Cutting Tool Metal Engraving Blades Knifes Wood Carving Disc
Multifunction Hooks	4Pcs 160mm Car Auto Vehicle Oil Seal Screwdrivers Set O Ring Gasket Puller Remover Pick Hooks Multifunction Tools
Spudger set	5PCs Car Audio Trim Removal Tool Kit Anti-Scratch Pry Applicable Car Door Panel and Audio Dashboard
IC Chip Pickup Tool	IC Chip Pickup Tools Pen Extractor Electronic Parts Gripper Electronic Repair Tools
Metal spudgers	6PCS Metal Crowbar with Two Ends Universal Mobile Phone Digital Home Appliance Product Dismantling Stick Shell Opening Tool
Victorinox Swiss Champ Red Swiss Army Knife	VICTORINOX SWISS CHAMP RED – SWISS ARMY POCKET KNIFE – LENGTH: 91 MM – 33 TOOLS	notes
Scotch Titanium Scissors	3M Scotch Precision Ultra Edge Titanium 8″ Scissors Stay Sharp Smooth Cutting	notes
DT830B Digital Multimeter	DT830B AC/DC LCD Digital Multimeter 750/1000V Voltmeter Ammeter Ohm Tester High Safety Handheld Meter Digital Multimeter	notes