A look at how the Banksy artwork prank “Girl with a Balloon” shredded itself moments after being sold for £1M at a Sotheby’s auction.
How long did it sit idle waiting to be triggered?, and was this actually possible?
NOTE: The Artwork was authenticated by “Pest Control”, which is Banksy’s own authentication house. If the artwork was delivered to them for checking before the auction, this is when they installed the mechanism. I still think the at least the seller has to be in on it, and likely the buyer (otherwise they could sue Banksy and bring his real name into the public). And if Sotheby’s were in on it (they’d lose their reputation if they were) they look like fools. Lose–lose for Sotheby’s.
How to turn a horrible unorganised schematic into a nice readable modular schematic with proper signal flow.
Tips on industry standard and expected layout techniques.
Using the open source Haasoscope oscilloscope as an example.
Please do NOT complain about the length of this video. I know. It is what it is.
9:28 LED configuration
12:28 Single Page Vs Multi page schematics
14:24 Net lines and bus lines
25:25 Connection stuff
36:32 Consistent component symbols
37:29 Signal flow from left to right (schematic reorganisation part 1)
44:15 The great nF debate
46:18 Text designation (Part II)
47:57 Net line Vs Port (for blocks)
49:43 Description on blocks
50:02 Signal f low from left to right (schematic reorganisation part 2)
1:08:38 Don’t put junctions on line cross-overs (Don’t cross the streams)
Follow-up to the Studio Monitor Noise video, replacing the mains power supply with a battery supply. Does the noise floor go away?
Yes, Mailbag Monday is back!
Weekly mailbag videos to come.
Perhaps the worst schematic ever seen?
Only two items for today’s Mailbag, and I had a lot to say on each.
The WIHA SpeedE Electric Screwdriver
This sub US$500 Eakins microscope from Aliexpress seems identical to the new AU$1800 Suba Engineering microscope for 1/3 the cost.
And Dave shows how it can out perform the $4500 Tagarno!
Inside the new Rigol 7000 Series oscilloscope with custom ASIC’s.
Also a look at the bootloader code for potential hacks.
A look at the recent EEVblog meetup and the projects people bought along to show off. And you won’t believe which companies advertised at the event!
Youtube isn’t suggesting Fran Blanche’s channel any more, what’s going on?
Does Youtube not suggest de-monetised content?
Who saw it coming?, Fontus have filed for bankruptcy!
The infamous “self-filling water bottle” that raised $340k on Indiegogo has gone bankrupt and delivered nothing.
You ‘canna beat the laws of physics Captain!
Gav “The Mechatronics Guy” explains circular polarised light and demonstrates his physical laser cut models to help understand this concept in his quest to make a pixel mapped polarised light camera.
How do 3D shutter glasses work?
Bart Schroder from Cleverscope talks about the challenges in designing the world’s highest performance isolated oscilloscope.
Measurement demo on a 500V MOSFET H-Bridge and how to accurately probe it. Then a teardown and walk through of the design of the new CS448 1kV 4CH 200MHz 14bit isolated oscilloscope and the custom probes, power supplies and optical fibre interfaces they had to design to get this performance.
Why do many powered studio monitor speakers have a low level audible background noise?
This is an issue with many big and popular brand monitors like KRK, Yamaha, JBL, Alesis and many others
Time for some investigation on the KRK Rokit 6 studio monitor speakers to track down where the noise is coming from.
NOTE: Not all monitors have this issue, many much higher end ones may not. It pays to check this first if you are going to spend decent money on studio monitors, as you may find it annoying.
Are power planes in a 4 layer PCB any good as a capacitor?
Can it work as one big bypass capacitor?
A look at an discussion on PCB layer stackups, and some measurements on 4 and 8 layer PCB power planes with different prepreg thicknesses and how well they work as a capacitor.
Circuit building block time. The capacitance multiplier and how it gives almost negligible power supply ripple compared to a voltage regulator.
Whiteboard theory and then some bench demonstrations and experiments. Plus a twist at the end that proves that the “Capacitance multiplier” is perhaps one of the most mis-named circuits of all time.