Archive for the ‘computers’ Category:

2022-06-27 The Complete History of the Home Microprocessor

A min YouTube video.

2022-06-01 USB Cable Internal Resistance

I had a “high quality” 1 meter long USB A male to type C charging cable go bad so I cut the bad type C connector off. Then I stripped and twisted the two 5V wires together and measured the total wire resistance on the A end with my HP 3478 DMM in the 4

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2022-05-31 UCI: Autonomous Vehicles Spooked By Objects

This research from U. California Irvine says they can trick autonomous vehicles into erratic behavior.

2022-05-29 CuriousMarc

Short YouTube video bio of “curiousMarc” Marc Verdiell.

2022-05-28 Capacitors: Inferior Or Compromise

Long discussion about the great electrolytic capacitor failure fiasco of 2003. Someone said Dell lost $420 million on in-warranty repairs (we had Optiplex 270 and 280 MoBoards with those bad caps). Tom May One single video of cheap capacitors failing could be an individual with an axe to grind, trying to blemish a company. I

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2022-04-22 Reasons For The Chip Shortage

ASML makes equipment for leading edge chips, so later there may be a shortage of those; see this article. But I find it amusing that they’re salvaging trailing edge (older) chips from washing machines to reuse for other purposes. But this article explains in detail how the chips are made and why they’re having

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2022-04-12 Chip Shortage Actually A Wafer Shortage

For more than a year during this ‘chip shortage, I’ve constantly heard, Elon Musk should build a chip fab. Build a chip fab! Build a chip Fab! Over and over again. It turns out that the chip shortage is actually a wafer shortage – there are not enough 200 mm (8 inch) wafers to make

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2022-02-01 Level 5 Autonomy Needs Smart Roads

From FB group TSLA… I think that level 5 autonomy is going to need the roads to have some role in driving the vehicle. There are a lot of transitory and emergency events that take place that will best be handled by the roads than by vehicles. Seems to me that a huge amount of

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2022-01-12 Printer Ink Cartridges Are A Ripoff

From FB group The article said DRM, but it didn’t make sense to me either. But what makes me wonder is why do they go to the trouble and expense to put a chip in the cartridge if it’s just a matter of accepting the prompt that appears??? What purpose does the chip serve? The

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2021-12-21 RS-232 Sharing Box, RS-485, Poll-Select, Etc.

I had hundreds of CRT terminals around campus, connected to 16 RS-232 ports on the mainframe computer, back in the ’80s and ’90s. The protocol was Burroughs poll-select. Each of a dozen or so terminals was given its own address by dip switch. They were all running at 9600 bps over telephone lines driven by

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