Today on the BBC: Popping a cocktail of supplements every day might be doing you more harm than good. They say “those which are particularly toxic to the liver when taken in high doses include vitamin A, glutamine, ashwagandha and green tea extract.”
Today I am reading The Decision Book which Justin Sung mentioned recently.
A fellow crustacean helped me find out more information about my mechanical pencils by asking on reddit. Turns out they’re still available at Officeworks: Keji Mechanical Pencils. Pretty happy about that! Nice work Internet, and thanks @badtuple! ❤️
Technically there’s nothing special about these mechanical pencils. They’re just cheapo plastic things. But I like them because they are lightweight, the grip is good, they have an eraser, and the nib is clear which means you can check on the status of the lead, if it’s run out or broken. So I am very pleased to now have a lifetime supply of these:
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Silly Job Title: Circuit Sorcerer. I am the Circuit Sorcerer!
In this video we assemble the CD4017 Colorful Voice Control Rotating LED Light Kit Electronic Manufacturing DIY Kit Spare Parts Student Laboratory.
The notes are on the wiki, over here: CD4017 Colorful Voice Control Rotating LED Light Kit.
I am planning to come back and review this circuit again in future. I have three spare kits and I’d like to understand the circuit better, particularly the filter and how the transistor controls the clock signal.
We use the METCAL PS-900 Soldering Station to solder.
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 Tenma 72-10505 Bench Power Supply to provide 5V for testing.
We use the Fluke 17B+ Digital Multimeter to check our resistors.
We use the Bysameyee Head-Mounted Magnifier for magnification.
We use the Scotch Titanium Scissors for snipping.
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!
Yum Cha IC Extractor Claw IC Chip Pickup Tool |
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This post is part of my video blog and you can find more information about this video.
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 Light notes |
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You can support this channel on Patreon: patreon.com/JohnElliotV
This post is part of my video blog and you can find more information about this video.
Silly Job Title: Current Curator. I am the Current Curator!
In this video we follow the instructions to build the Space Drop handheld computer game which you can buy in kit form from here: Space Drop Solder Kit.
The kit comes with the software preinstalled on the D1 Mini microcontroller, but in this video we replace the code with our own version of the code just to see if we could. And we could! Our code is here: Space_Drop.ino.
We use the METCAL PS-900 Soldering Station for soldering.
We use the Pro’sKit SS-331H Desoldering Pump to remove the OLED screen which I accidentally installed without the spacer.
We use the MUIN Solder Fume Extractor to clear the air.
We use the Bysameyee Head-Mounted Magnifier for magnification.
We use the Scotch Titanium Scissors to chop up the packaging for scrap-booking.
We use the Hakko CHP 3C-SA Precision Tweezers for holding solder off cuts.
We use the Plato Model 170 Wire Cutter to snip off 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 OLED 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!
DUTRIEUX 14pcs Hexagonal Socket Set |
Let’s go shopping!
Check out Spliseal! Demo below.
In this photo we see three voltmeters (across the top) and five ammeters (across the bottom) attached to a voltage divider connected to a load.
30 V is applied then 2 mA flows through R1 and then splits with 1 mA going through R2 and 1 mA going through Rload. 20 V drops across R1 and there is 10 V across R2 and Rload.
The circuit on the left in the schematic below is the one being tested. In this case R1, R2, and Rload are all 10 kΩ. As R2 and Rload are connected in parallel their effective resistance is 5 kΩ. R1 being 10 kΩ gets two thirds of the voltage because R2 || Rload is 5 kΩ getting one third of the 30 V being 10 V.
I had three third-hands with two clips each. I cannibalized one of them for parts and now I have two third-hands with three clips each and a spare light / magnifying glass.
