How to use QuickSort algorithm to find a median value.
The Smartest Algorithm No One Uses
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Category Archives: Chatter
PHP URL
Today while reading My temporary PHP fix from 2014 has nearly 20M installs. Today I’m deprecating it. I learned about PHP 8.5’s New URI Extension: A Game-Changer for URL Parsing.
9 Firmware Shortcuts You Should Never Ship in a Product
More wisdom from John Teel.
Less-Common Features of Multimeters
Some interesting features.
His old Fluke 187 meter has a “nS” mode (nano-siemens) which can give crazy high resistance measurements (up to 100 GΩ) as conductance measurements.
His Fluke 87V has a low pass filter on its AC voltage input.
He explains Lo-Z mode and phantom voltage. It works by putting a thermistor across the input leads.
His old Tekpower TP8250 analog meter has a D.Ω range for measuring low resistances and a NULL mode for indicating voltage direction. His Sanwa EM7000 also has a NULL mode facility.
His Tekpower TP8250 also has a battery mode, which will measure the voltage from a battery with a load attached.
His ANENG AN870 has a Non-Contact Voltage sensing (NCV) mode which does what it says on the tin. My NCV device is a Fluke 1AC-C2-II VoltAlert Voltage Detector.
Old tech books
Some old tech books I probably shouldn’t have purchased:
How Inverters Turn Battery Power into AC
Infinite series
I asked ChatGPT to make a visual for the infinite series which sums to two and it gave me this:
Learning the Art of Electronics: 2N.2.1 Differentiators, Again | In The Lab With Jay Jay
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This post is part of my video blog and you can find more information about this video.
Silly Job Title: Electricity Guardian. I am the Electricity Guardian!
In this video we continue working through Learning the Art of Electronics. Today we revisit the differentiator we built last week. We build a new differentiator using a 10 nF capacitor and a 100 Ω resistor. Before we build our circuit we simulate it using EveryCircuit.
We use the Rigol MSO5074 Mixed Signal Oscilloscope to investigate our signal and generate our 50 kHz sine wave.
We use the METCAL PS-900 Soldering Station for soldering.
We use the MUIN Solder Fume Extractor to clear the air.
We use the Peak Electronic Design Atlas LCR45 LCR Meter to measure our capacitors.
We use the Bysameyee Head-Mounted Magnifier for magnification.
We use the Multicomp Pro MP701033 Resistor Decade Box as our variable resistor.
We use the Hakko CHP 3C-SA Precision Tweezers for tweezering.
We use the Plato Model 170 Wire Cutter to trim our 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!
UNI-T UTi260B Thermal Imager notes |
Let’s go shopping!
Adafruit SHARP Memory Display
Today I learned about the Adafruit SHARP Memory Display. Looks like an interesting bit of kit. Don’t have one yet, but maybe one day.
Bayside Ceiling Fan
Today I had a Bayside Archer 132cm DC Fan with Light Kit in White installed in my lab. The new light is Lucci 21W 220mm GX53 LED CCT Dimmable Globe. There is a switch on the light to operate it at 3000K/4000K/5000K Kelvins. It’s nice and bright, I am a happy customer.
