Tag Archives: LED

The Sunrise-Sunset Light | Project 7/30 | Maxitronix 30in1 | In The Lab With Jay Jay

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

In this video we continue to work through our Maxitronix 30in1, today doing project #7: The Sunrise-Sunset Light. In this project we see how an electrolytic capacitor can control and NPN transistor. By varying the resistor and capacitor we can change the timings of the circuit.

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

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 IC Extractor Claw IC Chip Pickup ToolThis is an image of the product.

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Interlude #18: Measuring Forward Voltage of LEDs of Various Colours | In The Lab With Jay Jay

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Silly Job Title: …

In this video we use our Peak Electronic Design Atlas DCA75 Pro Semiconductor Analyzer to measure the forward voltage of ten different LEDs which I keep in stock.

In the following table the values are computed for VS = 5V and I = 20mA.

Size Colour VF VR RS
10mm RED 1.890 3.110 156
10mm GREEN 2.030 2.970 149
10mm BLUE 2.643 2.357 118
10mm YELLOW 1.939 3.061 153
10mm WHITE 2.615 2.385 119
5mm RED 1.889 3.111 156
5mm GREEN 1.995 3.005 150
5mm BLUE 2.710 2.290 115
5mm YELLOW 2.019 2.981 149
5mm WHITE 2.775 2.225 111
VS
Supply voltage, e.g. 5 V.
I
Desired LED current in milliamps, e.g. 20 mA.
VF
Forward voltage, as measured; e.g. 1.8 V.
VR
Voltage across resistor = VS – VF.
RS
Series resistance to use, in Ohms = VR / I.

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

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The One-Way Street | Project 3/30 | Maxitronix 30in1 | Learning Electronics In The Lab With Jay Jay

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Silly Job Title: Chief Fuse Blower. I am the Chief Fuse Blower!

In this video we continue to work through our Maxitronix 30in1, today doing project #3: The One-Way Street. In this project we learn a little more about diodes and LEDs.

We use the EEVblog BM2257 Digital Multimeter to investigate voltages within our circuit.

We use the Sharp EL-546L Scientific Calculator to do some basic calculations.

We use the Carpenter Mechanical Pencil to make our notes.

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!

Fluke 17B+ Digital MultimeterThis is an image of the product.

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The Electronic Storage Tank | Project 2/30 | Maxitronix 30in1 | In The Lab With Jay Jay

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Silly Job Title: Tech Lead. I am the Tech Lead!

In this video we do the 2nd project from the Maxitronix 30in1 Electronics Project Lab Kit: The Electronic Storage Tank.

We use the Rigol MSO5074 Mixed Signal Oscilloscope to measure the voltage across the capacitor.

We use the UNI-T UTi260B Thermal Imager to check for thermal response (there was none).

We use the Riden RD6006 Bench Power Supply to provide 3V to our test circuit.

We use the EEVblog BM2257 Digital Multimeter to measure voltage across the capacitor.

We use the Peak Electronic Design Atlas DCA75 Pro Semiconductor Analyzer to measure the forward voltage of our LED.

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!

Rigol PLA2216 Compatible Logic ProbeThis is an image of the product.notes

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Interlude #10: Take Three: Improving My Maker Faire ‘Here There Be Makers’ Badge | In The Lab

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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 have a third go at my Maker Faire “Here There Be Makers” badge. You can see my previous attempts here and here

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!

Scotch Titanium ScissorsThis is an image of the product.notes

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