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Technical Analysis

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"I [suspect] that we are throwing more and more of our resources, including the cream of our youth, into financial activities remote from the production of goods and services, into activities that generate high private rewards disproportionate to their social productivity. I suspect that the immense power of the computer is being harnessed to this 'paper economy', not to do the same transactions more economically but to balloon the quantity and variety of financial exchanges." --James Tobin, July 1984
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jepler
44 minutes ago
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Everyone's retirement plan in a nutshell.
Earth, Sol system, Western spiral arm
wreichard
8 hours ago
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No better than monkeys throwing darts.
Earth
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3 public comments
RC1140
3 hours ago
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Comments to real
alt_text_bot
8 hours ago
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"I [suspect] that we are throwing more and more of our resources, including the cream of our youth, into financial activities remote from the production of goods and services, into activities that generate high private rewards disproportionate to their social productivity. I suspect that the immense power of the computer is being harnessed to this 'paper economy', not to do the same transactions more economically but to balloon the quantity and variety of financial exchanges." --James Tobin, July 1984
alt_text_at_your_service
8 hours ago
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"I [suspect] that we are throwing more and more of our resources, including the cream of our youth, into financial activities remote from the production of goods and services, into activities that generate high private rewards disproportionate to their social productivity. I suspect that the immense power of the computer is being harnessed to this 'paper economy', not to do the same transactions more economically but to balloon the quantity and variety of financial exchanges." --James Tobin, July 1984

CNC Mill Repairs iPhone 7

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Modern smartphones are highly integrated devices, bringing immense computing power into the palm of one’s hand. This portable computing power and connectivity has both changed society in innumerable ways, and also tends to lead to said powerful computers ending up dropped on the ground or into toilets. Repairs are often limited to screen replacement or exchanging broken modules, but it’s possible to go much further.

The phone is an iPhone 7, which a service center reported had issues with the CPU, and the only fix was a full mainboard replacement. [The Kardi Lab] weren’t fussed, however, and got to work. The mainboard is installed in a CNC fixture, and the A10 CPU is delicately milled away, layer by layer. A scalpel and hot air gun are then used for some further cleanup of the solder pads. Some conductivity testing to various pads is then carried out, for reasons that aren’t entirely clear.

At this point, a spare A10 CPU is sourced, and a stencil is used to apply solder paste or balls – it is not immediately obvious which. The new chip is then reflowed on to the mainboard, and the phone reassembled. The device is then powered on and shown to be functional.

It’s an impressive repair, and shows that modern electronics isn’t so impossible to fix – as long as you have the right tools to hand. The smart thing is, by using the CNC machine with a pre-baked program, it greatly reduces the labor required in the removal stage, making the repair much more cost-effective. The team are particularly helpful, linking to the tools used to pull off the repair in the video description. We’ve seen similar hacks, too – such as upgrading an iPhone’s memory.  Video after the break.

[Thanks to Nikolai for the tip!]





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jepler
22 hours ago
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that's pretty crazy as a repair technique.
Earth, Sol system, Western spiral arm
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Preview – Metro M4 WiFi Express @adafruit @arduino @CircuitPython @MicrochipMakes @ESP32net #arduino #circuitpython

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Wifim4

Preview, Metro M4 WiFi Express, SAMD51 with all the goodies you expect for CircuitPython + ESP32 co-processor (caboose?) on the SPI bus to do SSL, WiFI and maybe even BTLE! Best o’ both worlds 🙂

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jepler
1 day ago
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Looks more versatile than their M0 + wifi, unless the Feather form factor is important to you
Earth, Sol system, Western spiral arm
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Nissan unveils its longest-range Leaf EV yet

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Even though it's one of the oldest EVs on the market, the Nissan Leaf has only been available with just 150 miles of range -- far less than its newer rivals. Nissan has finally rectified that at CES 2019 by unveiling the 2019 Leaf e+. It packs a 62 kWh battery pack that can propel it about 226 miles, approaching the range of Chevy's Bolt and the Tesla 3 base version.

There wasn't much to improve besides battery life over the 2018 Leaf, which introduced a sleeker design, the excellent ProPilot driver assistance tech and a 40 kWh battery. The Leaf e+ continues that progress on the drive train side, not only increasing range by 40 percent, but adding a new 150 kW motor (around 200 HP), which bumps power by 33 percent.

That means it's not only much zippy off the line, Nissan says, but faster on the freeway, too, making passing and other maneuvers safer. It also charges quicker too, able to use CHAdeMO chargers up to 100kW compared to 40kW on the last model.

Nissan also updated its "Intelligent Mobility" interface with a larger 8-inch display. It's controlled by smartphone-like swiping, scrolling and tapping gestures, and apps, maps and firmware are updated over the air. Nissan now offers door-to-door navigation that syncs to your smartphone and has integrated Nissan Energy -- its vehicle-to-home system for managing battery-assisted solar power and other home energy installations.

The launch of the Leaf was actually delayed because of the dramatic arrest of former CEO Carlos Ghosn in Japan. It's coming this month to Japan for 4,162,320 yen ($38,000), will hit Europe later this quarter for 45,000 euros and arrive to US shores sometime this spring. US pricing has yet to be announced.

Source: Nissan

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jepler
1 day ago
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going over 200 miles sure changes how I'd think about the leaf. Not that we're considering a car purchase in the next 5 years, so it's moot.
Earth, Sol system, Western spiral arm
zipcube
1 day ago
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Dallas, Texas
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Radio time station transmitter using the Raspberry Pi #PiDay #RaspberryPi @Raspberry_Pi

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Radio time station transmitter using the Raspberry Pi

Do you have a watch or device that is supposed to sync its time with one of the world time services? DCF77 (Germany), WWVB (US), MSF (UK), or JJY (Japan)?

There are many times you may not be near these transmitters to have your device sync up or your location may shield the signal. What to do??

Henner Zellerhzeller on GitHub, has designed and implemented an elegant solution using a Raspberry Pi! With the code and a few small components, the circuit broadcasts to a device like a watch just like the time services would, over radio frequencies!

I am living in a country where there is no DCF77 sender nearby for my European radio controlled wristwatch to get its time. This vintage Junghans Mega doesn’t have any buttons to set the time, so to bring it back to life, I built my own ‘transmitter’, taking the NTP time of a Raspberry Pi and generating a modulated signal via GPIO pins to then magnetically couple it into the watch ferrite.

This program is useful if you have a clock that otherwise does not get any reception. This magnetic coupling is very low power and only works over a few centimeters, but before running this program, make sure you follow your local laws with regard to restrictions on radio transmissions.

See the video below for a demonstration and head over to GitHub for the code and build instructions.

Do you have a radio enabled device (Ed: I have a Casio watch that uses US or Euro time broadcasts)? Let us know in the comments.

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jepler
1 day ago
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I started a similar project years ago and got as far as a generator for wwvb signals in python: https://github.com/jepler/wwvbpy -- but I never got a device to successfully set.
Earth, Sol system, Western spiral arm
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Receipts are secretly really bad–why are we still using them?

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Not only are they hugely wasteful, they’re also poisoning you every time you buy something.

If you walk into a neighborhood coffee shop in San Francisco and buy a drink, you’ll probably pay on a Square reader and get your receipt by email. If you walk into the Walgreens next door, you might get a foot-long paper receipt. A new bill in California aims to shift all stores to a default digital version, and raises the question of why we’re still cutting down trees and lacing paper with BPA when the technology exists for an alternative.

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jepler
4 days ago
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So my choices are to destroy the environment OR hand over my e-mail address to every retailer I visit in person?
Earth, Sol system, Western spiral arm
DMack
3 days ago
I was just thinking the other day, I'd like it if my credit card company / bank could do that, and have it all in a searchable database or something. That would require me to funnel all my spending through my dumb little cash back credit card, which I already do
wreichard
2 days ago
I don’t think Apple Pay, at least, gives any private info to the recipient. Though I loathe receipts and would give up my email address to avoid them since I can filter such things like all the other spam.
JimB
23 hours ago
If I pay with Google pay (presumably like other app based payment systems), I don't even need any receipt. The app shows what I've spent and where. Besides which - surely you have an email address specifically for junk like this? They're easy to get. Or make up any random address.
JayM
4 days ago
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Atlanta, GA
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fxer
4 days ago
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But think of the loggers and the people mining BPA ore who will be out of a job
Bend, Oregon
wreichard
2 days ago
And those damned owls will gloat.
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