Inside the charging case for some $20 “true wireless” earbuds

For extra points here is the program. Can you tell where I made the error?

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There is nothing more sci-fi than the way a classic HP calculator looks when it’s running a user entered program.

Commands get sent down from the crane control room to the gear room by these LEDs installed in what I think are baking tins...

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And here’s what it’s like to stand on the platform outside the gear room while the entire crane slews.

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Big anchor energy. We moved the anchor from the bow of the boat to the stern, and in doing so flipped it over so the marine archeology folks can conserve the bottom side of it.

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This end of the room drives the derrick and hoist. Here it’s “luffing” by turning the giant screw threads that go up in to the crane.

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Did some learning on how to operate the “gear room” on the Hikitia today. These are the slewing and counterweight movement mechanisms.

I am calling this a success. I didn’t get the new module perfectly aligned but I think (as you’ll see in my next post) I eventually got it close enough. Being without the HP factory tooling to bend the leads jjjuuuust right and compounded by using a replacement module of not exactly the same package means it’ll never be completely factory perfect. I’m OK with that.

Here’s a better photo of the modified LCD driver. The LED backlight driver is an ADD5201 (analog.com/media/en/technical-). I changed the configuration resistors to put it in direct-PWM mode then tied the backlight enable and PWM pins high (to the 3.3v rail conveniently generated inside the driver IC).

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Re-visiting a classic laptop recycling manoeuvre in an age of more complicated backlight drivers

Still running a bit weak but not bad! Better than it was.

It runs but struggly. I think the balance pivots might be bent :(

Oh and instead of screws in a bunch of places it has brass taper pins, shown here under the microscope :/

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Everything has been cleaned, rinsed and dried and I started reassembly but I’ll probably finish it tomorrow.

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