Category Archives: Science

Passive sign convention

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Today I learned about the passive sign convention in electric circuits. It is also known as “associated references”. When current is flowing into the positive terminal of a circuit element then the element is absorbing power. When current is flowing into the negative terminal of a circuit element then the element is providing power. P = VI and when P is positive the element is receiving power and when P is negative the element is providing power. In a complete circuit the sum of power is zero, the sources and loads are evenly balanced.

The Electronic Canary | Project 15/30 | Maxitronix 30in1 | In The Lab With Jay Jay

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Silly Job Title: Current Connoisseur. I am the Current Connoisseur!

In this video we do the 15th project from the Maxitronix 30in1 Electronics Project Lab Kit: The Electronic Canary.

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

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

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Learning the Art of Electronics: 1W.3 Instrument Imperfections | In The Lab With Jay Jay

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

In this video we continue working our way through Learning the Art of Electronics and continue working through 1W Worked Examples: DC circuits with 1W.3 Working around imperfections of instruments.

We use the Tenma 72-10505 Bench Power Supply for 20 V power.

We use the EEVblog BM2257 Digital Multimeter as our voltmeter (DVM).

We use the Pro’sKit MT-2207-C Analog Multimeter as our ammeter (VOM).

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

We use the Carpenter Mechanical Pencil to take notes.

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

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

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p.s. today I added DVM and VOM 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!

Yizhan Digital MicroscopeThis is an image of the product.notes

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Learning the Art of Electronics: 1W.2 Resistor power dissipation | In The Lab With Jay Jay

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Silly Job Title: Chief Fuse Blower.

In this video we continue working our way through Learning the Art of Electronics and continue working through 1W Worked Examples: DC circuits with 1W.2 Resistor power dissipation and 1.2.2.C Power in resistors.

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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!

Ninth World Floppy Disk USB DriveThis is an image of the product.

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The Bee | Project 14/30 | Maxitronix 30in1 | Learning Electronics In The Lab With Jay Jay

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Silly Job Title: Systems Architect. I am the Systems Architect!

In this video we do the 14th project from the Maxitronix 30in1 Electronics Project Lab Kit: The Bee.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to view the oscillating signal.

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

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

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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 13mm Center PunchThis is an image of the product.

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Learning the Art of Electronics: 1W.1 Designing an Ammeter | In The Lab With Jay Jay

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Silly Job Title: Electronics Guy. I am the Electronics Guy!

In this video we continue working our way through Learning the Art of Electronics and begin working through 1W Worked Examples: DC circuits. Particularly we design and implement the 1A ammeter. Next week we will do the voltmeter.

I measure the internal resistances of my various analog meters, which comes out like this:

Meter Resistance (Ω)
100 µA 2,271
1 mA 239
10 mA 27
100 mA 7
1 A 2
5 V 4,916
10 V 9,150
15 V 13,010

We use the METCAL PS-900 Soldering Station to solder our 222 mΩ resistor.

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

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

We use the Riden RD6006 Bench Power Supply to provide test voltages and currents.

We use the EEVblog BM2257 Digital Multimeter to measure various things, particularly resistance.

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

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 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! :)

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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