Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging

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My Sonicare electric toothbrush recently quit working, so I took it apart and examined the interesting circuitry inside. There's much ...
28 comments:

Restoring a Xerox Alto day 7: experiments with disk and Ethernet emulators

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In this Alto restoration session we controlled the Alto's disk drive with an FPGA disk emulator and attempted booting the Alto with a B...

How to run C programs on the BeagleBone's PRU microcontrollers

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This article describes how to write C programs for the BeagleBone's microcontrollers. The BeagleBone Black is an inexpensive, credit-...
23 comments:

Restoring YC's Xerox Alto: how our boot disk was trashed with random data

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In the previous Xerox Alto restoration session , we got the disk working, but the system didn't boot. After much investigation, I dis...
9 comments:

Restoring YCombinator's Xerox Alto day 6: Fixed a chip, data read from disk

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In today's Xerox Alto restoration session we investigated why the disk drive isn't working and found a failed chip. With this chip...
9 comments:

Lacking safety features, cheap MacBook chargers create big sparks

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You might wonder if it's worth spending $79 for a genuine MacBook charger when you can get a charger on eBay for under $15. You should...
4 comments:

Restoring YCombinator's Xerox Alto day 5: Microcode tracing with a logic analyzer

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In today's Xerox Alto restoration session we investigated why the system doesn't boot. We find a broken wire, hook up a logic analyz...
6 comments: